82 XJ750 Head Studs

I just finished removing the head on my 1982 XJ750 due to a broken exhaust stud. I noticed that some of the head studs had some pitting. I can't find any new ones online and the only things i can find on xj4ever is are the dowel pin / stud collar. Any advise on either finding new studs or cleaning up the old ones would be appreciated. While the head is off, is there anything I should look at or replace?

 

Are you referring to the long studs (head to upper crankcase) or some of the short studs on the front and rear of the head?

 

Mostly the shorter ones closer to the exhaust. I’ll attach pictures that might help clarify

 

CYLINDER HEAD & JUGS HARDWARE:

The long studs, their washers, and crown nuts that secure the cylinder head and jugs to the upper engine case take a lot of stress and heat, and it's not a bad idea to replace these when doing a head service or a full engine rebuild, as proper torque values may be difficult (if not impossible) to achieve on used, stretched, and (typically) very rusted studs. NOTE: originally, some of these long studs came with a black plastic outer sheathing which is not always present on the replacement studs, but can be ordered separately below.

Additional hardware pieces used to insure the proper alignment of the cylinder head to the jugs, and also at the bottom of the jugs to insure proper alignment to the upper crankcase. These stud collars (or dowel pins) typically are rusted and semi-or-fully seized into their bores after years of use, and all of these locators and their associated o-rings and gaskets should always be replaced whenever the cylinder head or the jugs are removed.

There are also threaded studs (and associated washers and nuts) that secure the head to the jugs (typically at the front and rear of the cam chain tunnel), as well as a forward stud and hardware that secures the bottom of the jugs to the upper crankcase, which should be carefully inspected and replaced if needed whenever the head or jugs come off.


XJ650, XJ700 air-cooled, XJ750 air-cooled, and XJ900RK, RL, N, FN, and F engines:

HCP4661 OEM cylinder head-to-crankcase stud CROWN NUT, semi-polished bright finish, for all XJ650 (except Turbo and Midnight Maxim), all XJ700 air-cooled, all XJ750 air-cooled (except XJ750 Midnight Maxim), all XJ900 F, N, and FN models, XJ1100, and all XS1100 engines. Use 12 per engine on all positions. Each:
$

HCP4661SET12 OEM cylinder head-to-crankcase stud CROWN NUTS, set of 12:
$


HCP4660 OEM cylinder head-to-crankcase stud CROWN NUT, dark green (originally black) finish, for all XJ650 Turbo, XJ650 Midnight Maxim, XJ750 Midnight Maxim, XJ900RK and RL, and all XS1100 Midnight Special models, use 12 per engine on all positions. Each:
$

HCP4660SET12 OEM cylinder head-to-crankcase stud CROWN NUTS, set of 12:
$



HCP16424 Aftermarket cylinder head-to-crankcase stud CROWN NUT, high-polished chrome-plated finish, will fit all XJ650, all XJ700 air-cooled, all XJ750 air-cooled, all XJ900 F, N, and FN models, use 12 per engine on all positions. This nut is a bit taller (and lacks the flanged base) compared to the original HCP4660 or HCP4661 nuts, and has a beautiful, highly polished chrome finish compared to the stock HCP4661 nut above, and the extra height is visually pleasing. NOTE the lack of a flange on this nut requires the use of the HCP26762 shim washer on both of the #4 studs (outer positions), on top of the copper crush washer and under this crown nut, to insure a proper seal of the copper crush washer. Each:
$

HCP16424SET12 Aftermarket cylinder head-to-crankcase stud CROWN NUTS, set of 12:
$


HCP26762ET2 Aftermarket stainless-steel SHIMMING WASHERS, for use with the HCP16424 nuts above when used on all XJ650, all XJ700 air-cooled, all XJ750 air-cooled, all XJ900 F, N, and FN engines. This set of 2 washers does 1 engine.
$



HCP4665 OEM cylinder head nut FLAT COPPER WASHER, use 2 per engine on all XJ650, XJ700 air-cooled, XJ750 air-cooled, and XJ900RK, RL, N/FN, and F engines in the following position: both #4 cylinder outer positions. These copper washers fit underneath the crown nuts on the #4 outer long cylinder head studs and act as an oil seal and should be replaced whenever the head comes off. Each:
$

HCP21343 Aftermarket cylinder head nut FLAT COPPER WASHER, use 2 per engine on all XJ650, XJ700 air-cooled, XJ750 air-cooled, and XJ900RK, RL, N/FN, and F engines in the following position: both #4 cylinder outer positions. These copper washers fit underneath the crown nuts on the #4 outer long cylinder head studs and act as an oil seal and should be replaced whenever the head comes off. Each:
$


HCP4663 OEM cylinder head-to-crankcase stud FLAT WASHER, for all XJ650, all XJ700 air-cooled and XJ750 air-cooled, and XJ900RK, RL, N, FN, and F engines, use 10 per engine in the following position: all positions except the #4 cylinder outer positions. Use 12 per engine (all positions) on all XJ1100 and XS1100 engines. Each:
$

HCP4663SET10 OEM cylinder head-to-crankcase stud FLAT WASHER, set of 10:
$

HCP4663SET12 OEM cylinder head-to-crankcase stud FLAT WASHER, set of 12:
$



HCP29800 Aftermarket cylinder head-to-crankcase stud FLAT WASHER, for all XJ650, all XJ700 air-cooled and XJ750 air-cooled, and XJ900RK, RL, N, FN, and F engines, use 10 per engine in the following position: all positions except the #4 cylinder outer positions. Use 12 per engine (all positions) on all XJ1100 and XS1100 engines. Each:
$

HCP29800SET10 Aftermarket cylinder head-to-crankcase stud FLAT WASHER, set of 10:
$

HCP29800SET12 Aftermarket cylinder head-to-crankcase stud FLAT WASHER, set of 12:
$




HCP27405 Aftermarket cylinder head-to-crankcase LONG STUDS SET, for all XJ650, all XJ700 air-cooled and XJ750 air-cooled engines. This full set of 12 aftermarket studs does one engine, and features the proper size and configuration studs, and since they’re made from 4140 chrome-moly steel, they are actually tougher than the originals! The exterior plastic sleeve that was used on some of the original studs is not needed (and won’t fit; as these studs are so much thicker than originals). Studs are coated with a high-temp ceramic coating so they retain the “black” look as original. Use 1 set per engine. Each:
$


HCP5756 OEM cylinder head-to-crankcase LONG STUD, for all XJ650, all XJ700 air-cooled and XJ750 air-cooled engines, use 3 per engine, one each in the following positions: cylinder #1 outer rear, and cylinder #4 outer front and rear. XJ900RK, RL, N, F, and FN engines will use 4 per engine, one each in the following positions: cylinder #1 outer front and rear, and cylinder #4 outer front and rear. Each:
$

HCP5757 OEM cylinder head-to-crankcase LONG STUD, for all XJ650, all XJ700 air-cooled, all XJ750 air-cooled, and XJ900RK, RL, N, F, and FN engines, use 4 per engine, one each in the following positions: in-between cylinders #1 and 2, rear; #2 cylinder inner rear, #3 cylinder inner rear, and in-between cylinders #3 and 4, rear. NOTE: the original stud used (only) in the #2 rear inner position had a shouldered bottom that limited the depth of entry of the stud into the upper crankcase threaded bore hole. These studs no longer have this feature. Each:
$

HCP5759 OEM cylinder head-to-crankcase LONG STUD, for all XJ650, all XJ700 air-cooled, all XJ750 air-cooled, and XJ900RK, RL, N, F, and FN engines, use 4 per engine, one each in the following positions: in-between cylinders #1 and 2, front; #2 cylinder inner front, #3 cylinder inner front, and in-between cylinders #3 and 4, front. Has the black plastic sheathing as original. Each:
$

HCP5760 OEM cylinder head-to-crankcase LONG STUD, for all XJ650, all XJ700 air-cooled and XJ750 air-cooled engines, use 1 per engine in the following position: #1 cylinder outer front. Has the black plastic sheathing as original. Each:
$

HCP24664 Aftermarket cylinder head-to-crankcase LONG STUD, for all XJ650, all XJ700 air-cooled and XJ750 air-cooled engines, use 1 per engine in the following position: #1 cylinder outer front. Has the black plastic sheathing as original. Each:
$



HCP968 OEM camshaft bearing cap locating DOWEL PIN, use 12 per engine on all XJ550, 1984-85 FJ600, 1984-91 XJ600 Euro, 1986-88 FZ600, 1986-90 YX600 Radian, 1992-98 XJ600 Seca II, 1992-2002 XJ600 Euro, all XJ650, XJ700 non-X, and XJ750 air-cooled engines, and use 16 per engine on all XJ700-X, XJ750-X, and all XJ900RK, RL, N/FN, and F engines. Each:
$


HCP5825 OEM cylinder head-to-cylinder jugs locator STUD COLLAR or DOWEL PIN, for all XJ550, 1984-85 FJ600, 1984-91 XJ600 Euro, 1986-88 FZ600, 1986-90 YX600 Radian, 1992-98 XJ600 Seca II, 1992-2002 XJ600 Euro, all XJ650 models, XJ700 air-cooled, XJ750 air-cooled, and all XJ900RK, RL, N, F, and FN models. Use 4 per engine in the following position: #4 cylinder outer front and rear, in-between cylinders #3 & 4 front, and cylinder #1 outer rear. Each:
$

HCP5826 OEM cylinder head-to-cylinder jugs locator dowel pin ”DONUT” OIL SEAL, for all XJ550, 1984-85 FJ600, 1984-91 XJ600 Euro, 1986-88 FZ600, 1986-90 YX600 Radian, 1992-98 XJ600 Seca II, 1992-2002 XJ600 Euro, all XJ650, XJ700 air-cooled, XJ750 air-cooled, and all XJ900RK, RL, N/FN, F models, use 2 per engine in the following position: #4 cylinder outer front and rear. Each:
$

HCP26175 Aftermarket cylinder head-to-cylinder jugs locator dowel pin ”DONUT” OIL SEAL, for all XJ550, 1984-85 FJ600, 1984-91 XJ600 Euro, 1986-88 FZ600, 1986-90 YX600 Radian, 1992-98 XJ600 Seca II, 1992-2002 XJ600 Euro, all XJ650, XJ700 air-cooled, XJ750 air-cooled, and all XJ900RK, RL, N/FN, F models, use 2 per engine in the following position: #4 cylinder outer front and rear. Each:
$



HCP2941 OEM cylinder head-to-cylinder jugs MOUNTING STUD, used at the front of the cam chain tunnel. Use 2 per engine on all of the following engines: 1984-85 FJ600, 1986-88 FZ600, 1986-90 YX600, 1982-83 XJ650 Maxim, XJ650 Turbo, XJ700 air-cooled, XJ750 air-cooled, and all XJ900RK, RL, N/FN, and F engines, each:
$

HCP19160 Aftermarket cylinder head-to-cylinder jugs MOUNTING STUD, used at the front of the cam chain tunnel. Use 2 per engine on all of the following engines: 1984-85 FJ600, 1986-88 FZ600, 1986-90 YX600, 1982-83 XJ650 Maxim, XJ650 Turbo, XJ700 air-cooled, XJ750 air-cooled, and all XJ900RK, RL, N/FN, and F engines, each:
$


HCP5828 OEM cylinder head-to-cylinder jugs MOUNTING STUD, dark finish, alloy steel. Used at the front of the cam chain tunnel. Use 1 per engine on all 1980-81 XJ650 engines, each:
$

HCP25978 Aftermarket cylinder head-to-cylinder jugs MOUNTING STUD, bright finish, 18-8 stainless steel. Used at the front of the cam chain tunnel. Use 1 per engine on all 1980-81 XJ650 engines. NOTE: this stud is approximately 2mm longer than the original, but will fit and function properly. Each:
$



HCP5829 OEM cylinder head-to-cylinder jugs MOUNTING STUD, dark finish, alloy steel. Used at the front of the cam chain tunnel. Use 1 per engine on all 1982 XJ650RJ Seca engines, each:
$

HCP25826 Aftermarket cylinder head-to-cylinder jugs MOUNTING STUD, bright finish, 18-8 stainless steel. Used at the front of the cam chain tunnel. Use 1 per engine on all 1982 XJ650RJ Seca engines. NOTE: this stud is approximately 2mm shorter than the original, but will fit and function properly. Each:
$



HCP10852 OEM cylinder head-to-cylinder jugs MOUNTING STUD, used at the rear of the cam chain tunnel. Dark finish, alloy steel. Use 2 per engine on all YICS engines: 1982-83 XJ650 Maxim, XJ650 Turbo, XJ700 non-X, XJ750 non-X, and all XJ900RK, RL, N/FN, and F engines, each:
$

HCP25807 Aftermarket cylinder head-to-cylinder jugs MOUNTING STUD, used at the rear of the cam chain tunnel. Bright finish, 18-8 stainless steel. Use 2 per engine on all YICS engines: 1982-83 XJ650 Maxim, XJ650 Turbo, XJ700 non-X, XJ750 non-X, and all XJ900RK, RL, N/FN, and F engines, each:
$



HCP10855 OEM cylinder head-to-cylinder jugs MOUNTING STUD, dark finish, alloy steel. Used at the rear of the cam chain tunnel. Use 1 per engine on all 1980-81 XJ650 Maxim and Midnight Maxim and 1982 XJ650RJ Seca engines, each:
$

HCP25813 Aftermarket cylinder head-to-cylinder jugs MOUNTING STUD, dark finish, alloy steel. Used at the rear of the cam chain tunnel. Use 1 per engine on all 1980-81 XJ650 Maxim and Midnight Maxim and 1982 XJ650RJ Seca engines. NOTE: this stud is approximately 2mm longer than the original, but will fit and function properly. Each:
$

HCP25824 Aftermarket cylinder head-to-cylinder jugs MOUNTING STUD, bright zinc-plated alloy steel. Used at the rear of the cam chain tunnel. Use 1 per engine on all 1980-81 XJ650 Maxim and Midnight Maxim and 1982 XJ650RJ Seca engines. NOTE: this stud is approximately 2mm longer than the original, but will fit and function properly. Each:
$



HCP5827 OEM cylinder head-to-cylinder jugs mounting studs FLAT WASHER, alloy steel with a black finish, for the studs located at both the front and rear of the cam chain tunnel. Use 2 per engine on all 1980-81 XJ650 Maxim and Midnight Maxim, 1982 XJ650RJ Seca, XJ1100, and all XS1100 engines, each:
$

HCP25754 Aftermarket cylinder head-to-cylinder jugs mounting studs FLAT WASHER, zinc-plated alloy steel with a bright finish, for the studs located at both the front and rear of the cam chain tunnel. Use 2 per engine on all 1980-81 XJ650 Maxim and Midnight Maxim, 1982 XJ650RJ Seca, XJ1100, and all XS1100 engines, each:
$

HCP25755 Aftermarket cylinder head-to-cylinder jugs mounting studs FLAT WASHER, 18-8 stainless steel with a bright finish, for the studs located at both the front and rear of the cam chain tunnel. Use 2 per engine on all 1980-81 XJ650 Maxim and Midnight Maxim, 1982 XJ650RJ Seca, XJ1100, and all XS1100 engines, each:
$



HCP2173 OEM cylinder head-to-cylinder jugs mounting studs FLAT WASHER, for the studs located at both the front and rear of the cam chain tunnel. Use 4 per engine on all YICS engines: 1982-83 XJ650 Maxim, XJ650 Turbo, and all XJ750 non-X (except Midnight Maxim) engines, original bright finish, each:
$

HCP1869 OEM cylinder head-to-cylinder jugs mounting studs FLAT WASHER, for the studs located at both the front and rear of the cam chain tunnel. Use 4 per engine on all XJ750 Midnight Maxim engines, black-oxide finish, each:
$

HCP6642 Aftermarket cylinder head-to-cylinder jugs mounting studs FLAT WASHER, zinc-plated alloy steel with a bright finish, for the studs located at both the front and rear of the cam chain tunnel. Use 4 per engine on all 1982-83 XJ650 Maxim, XJ650 Turbo, and all XJ750 air-cooled engines, each:
$

HCP6643 Aftermarket cylinder head-to-cylinder jugs mounting studs FLAT WASHER, 18-8 stainless steel with a bright finish, for the studs located at both the front and rear of the cam chain tunnel. Use 4 per engine on all 1982-83 XJ650 Maxim, XJ650 Turbo, and all XJ750 air-cooled engines, each:
$

HCP25756 Aftermarket cylinder head-to-cylinder jugs mounting studs FLAT WASHER, 316 stainless steel with a natural finish, for the studs located at both the front and rear of the cam chain tunnel. Use 4 per engine on all 1982-83 XJ650 Maxim, XJ650 Turbo, and all XJ750 air-cooled engines, each:
$

HCP14285 Aftermarket cylinder head-to-cylinder jugs mounting studs FLAT WASHER, black oxide-coated 18-8 stainless steel, for the studs located at both the front and rear of the cam chain tunnel. Use 4 per engine on all 1982-83 XJ650 Maxim, XJ650 Turbo, and all XJ750 air-cooled engines, each:
$

HCP14284 Aftermarket cylinder head-to-cylinder jugs mounting studs FLAT WASHER, black oxide-coated hardened alloy steel, for the studs located at both the front and rear of the cam chain tunnel. Use 4 per engine on all 1982-83 XJ650 Maxim, XJ650 Turbo, and all XJ750 air-cooled engines, each:
$



HCP9125 OEM cylinder head-to-cylinder jugs mounting studs FLAT WASHER, for the studs located at both the front and rear of the cam chain tunnel. Use 4 per engine on all 1984-85 FJ600, 1986-88 FZ600, 1986-90 YX600, XJ700 non-X, and all XJ900RK, RL, N/FN, and F engines, each:
$

HCP23513 Aftermarket cylinder head-to-cylinder jugs mounting studs FLAT WASHER, for the studs located at both the front and rear of the cam chain tunnel. Use 4 per engine on all 1984-85 FJ600, 1986-88 FZ600, 1986-90 YX600XJ700 non-X, and all XJ900RK, RL, N/FN, and F engines, each:
$



HCP3494 OEM cylinder head-to-cylinder jugs mounting studs NUT, for the studs located at both the front and rear of the cam chain tunnel. Use 2 per engine on all 1980-81 XJ650 Maxim and 1982 XJ650RJ Seca models, each:
$

HCP24037 Aftermarket cylinder head-to-cylinder jugs mounting studs NUT, made from 18-8 stainless steel, for the studs located at both the front and rear of the cam chain tunnel. Use 2 per engine on all 1980-81 XJ650 Maxim and 1982 XJ650RJ Seca models, each:
$


HCP3495 OEM cylinder head-to-cylinder jugs mounting studs NUT, for the studs located at both the front and rear of the cam chain tunnel. Use 2 per engine on all XJ650 Midnight Maxim models, each:
$

HCP24038 Aftermarket cylinder head-to-cylinder jugs mounting studs NUT, for the studs located at both the front and rear of the cam chain tunnel. Use 2 per engine on all XJ650 Midnight Maxim models, each:
$


HCP581 OEM cylinder head-to-cylinder jugs mounting studs SPECIAL TALL FLANGED NUT with the 6mm allen-key drive, for the studs located at the front of the cam chain tunnel. Use 2 per engine on all 1982-83 XJ650 Maxim, XJ650 Turbo, XJ700 non-X, XJ750 non-X, and all XJ900RK, RL, N/FN, and F engines. NOTE: original nuts featured a bright finish, these are now supplied with a dark finish. Each:
$

HCP26769 Aftermarket cylinder head-to-cylinder jugs mounting studs FLANGED NUT, made from alloy steel with a bright zinc-plated finish. A more affordable option than the factory nuts, but note that these aftermarket nuts are regular-height, and do not feature the hex-drive opening (so you’ll need to use a deep 10mm socket to install them). Used on the studs located at the front of the cam chain tunnel. Use 2 per engine on all 1982-83 XJ650 Maxim, XJ650 Turbo, XJ700 non-X, XJ750 non-X, and all XJ900RK, RL, N/FN, and F engines, each:
$

HCP24409 Aftermarket cylinder head-to-cylinder jugs mounting studs FLANGED NUT, made from super-corrosion resistant 316 stainless steel. Note that these aftermarket nuts are regular-height, and do not feature the hex-drive opening (so you’ll need to use a deep 10mm socket to install them). Used on the studs located at the front of the cam chain tunnel. Use 2 per engine on all 1982-83 XJ650 Maxim, XJ650 Turbo, XJ700 non-X, XJ750 non-X, and all XJ900RK, RL, N/FN, and F engines, each:
$



HCP3968 OEM cylinder head-to-cylinder jugs mounting studs NUT, for the studs located at the rear of the cam chain tunnel. Use 2 per engine on all 1982-83 XJ650 Maxim, XJ650 Turbo, XJ700 non-X, XJ750 non-X, and all XJ900RK and RL engines, each:
$

HCP24059 Aftermarket cylinder head-to-cylinder jugs mounting studs NUT, for the studs located at the rear of the cam chain tunnel. Black-oxide coated stainless steel. Use 2 per engine on all 1982-83 XJ650 Maxim, XJ650 Turbo, XJ700 non-X, XJ750 non-X, and all XJ900RK and RL engines, each:
$


HCP5828 OEM cylinder head-to-cylinder jugs MOUNTING STUD, dark finish, alloy steel. Used on the rear of the cylinder head, directly below the #1 and the #4 intake ports. Use 2 per engine on all YICS engines: 1982-83 XJ650 Maxim, XJ650 Turbo, XJ700 non-X, XJ750 non-X, and all XJ900RK, RL, N/FN, and F engines, each:
$

HCP25978 Aftermarket cylinder head-to-cylinder jugs MOUNTING STUD, bright finish, 18-8 stainless steel. Used on the rear of the cylinder head, directly below the #1 and the #4 intake ports. Use 2 per engine on all YICS engines: 1982-83 XJ650 Maxim, XJ650 Turbo, XJ700 non-X, XJ750 non-X, and all XJ900RK, RL, N/FN, and F engines. NOTE: this stud is approximately 2mm longer than the original, but will fit and function properly. Each:
$



HCP5827 OEM cylinder head-to-cylinder jugs mounting studs FLAT WASHER, alloy steel with a black finish, for the large studs located at the rear of the cylinder head, underneath the #1 and #4 intake ports. Use 2 per engine on all XJ550, 1982-83 XJ650 Maxim, 1982-83 XJ650 Turbo, XJ700 all, XJ750 all, all XJ900RK, RL, N/FN, and F models, and XJ1100 engines, each:
$

HCP25754 Aftermarket cylinder head-to-cylinder jugs mounting studs FLAT WASHER, zinc-plated alloy steel with a bright finish, for the large studs located at the rear of the cylinder head, underneath the #1 and #4 intake ports. Use 2 per engine on all XJ550, 1982-83 XJ650 Maxim, 1982-83 XJ650 Turbo, XJ700 all, XJ750 all, all XJ900RK, RL, N/FN, and F models, and XJ1100 engines, each:
$

HCP25755 Aftermarket cylinder head-to-cylinder jugs mounting studs FLAT WASHER, 18-8 stainless steel with a bright finish, for the large studs located at the rear of the cylinder head, underneath the #1 and #4 intake ports. Use 2 per engine on all XJ550, 1982-83 XJ650 Maxim, 1982-83 XJ650 Turbo, XJ700 all, XJ750 all, all XJ900RK, RL, N/FN, and F models, and XJ1100 engines, each:
$



HCP3494 OEM cylinder head-to-cylinder jugs mounting studs NUT, for the large studs located at the rear of the cylinder head, underneath the #1 and #4 intake ports. Use 2 per engine on all YICS engines: 1982-83 XJ650 Maxim, XJ650 Turbo, XJ700 non-X, and all XJ750 non-X engines, each:
$

HCP24037 Aftermarket cylinder head-to-cylinder jugs mounting studs NUT, made from 18-8 stainless steel, for the large studs located at the rear of the cylinder head, underneath the #1 and #4 intake ports. Use 2 per engine on all YICS engines: 1982-83 XJ650 Maxim, XJ650 Turbo, XJ700 non-X, and all XJ750 non-X engines, each:
$


HCP3495 OEM cylinder head-to-cylinder jugs mounting studs NUT, for the large studs located at the rear of the cylinder head, underneath the #1 and #4 intake ports. Use 2 per engine on all XJ900RK, RL, N/FN, and F models, each:
$

HCP24038 Aftermarket cylinder head-to-cylinder jugs mounting studs NUT, for the large studs located at the rear of the cylinder head, underneath the #1 and #4 intake ports. Use 2 per engine on all XJ900RK, RL, N/FN, and F models, each:
$



On the right side of some heads, there is a casting passage block-off SCREW and WASHER. Some early model heads had all four of these casting passage openings sealed off with a non-removable plug, but later model heads used a screw with a gasket (reason for this change is unknown). This special screw incorporates both a hex-head and a phillips-drive screw slot.

HCP13857 OEM cylinder head casting passage block-off SCREW, use 1 per engine on all 1983 XJ550 heads, 1984-85 FJ600, 1986-88 FZ600, 1986-90 YX600 Radian, 1992-98 XJ600 Seca II, 1982-83 XJ650 Maxim heads, 1983 XJ650 Turbo head, all XJ700 air-cooled heads, 1982-83 XJ750 heads, and all XJ900RK, RL, N/FN, and F heads.
$

HCP26453 Aftermarket cylinder head casting passage block-off SCREW, use 1 per engine on all 1983 XJ550 heads, 1984-85 FJ600, 1986-88 FZ600, 1986-90 YX600 Radian, 1992-98 XJ600 Seca II, 1982-83 XJ650 Maxim heads, 1983 XJ650 Turbo head, all XJ700 air-cooled heads, 1982-83 XJ750 heads, and all XJ900RK, RL, N/FN, and F heads. NOTE: this screw is much close to the originally-installed screw than the HCP13857 screw listed above.
$


HCP4853 OEM cylinder head casting passage block-off screw copper CRUSH WASHER, use 1 per engine on all 1983 XJ550 heads, 1984-85 FJ600, 1984-91 XJ600 Euro, 1986-88 FZ600, 1986-90 YX600 Radian, 1992-98 XJ600 Seca II, 1992-2002 XJ600 Euro, 1982-83 XJ650 Maxim heads, 1983 XJ650 Turbo head, all XJ700 air-cooled heads, 1982-83 XJ750 heads, and all XJ900RK, RL, N/FN, and F heads.
$

HCP20671 Aftermarket cylinder head casting passage block-off screw copper CRUSH WASHER, use 1 per engine on all 1983 XJ550 heads, 1984-85 FJ600, 1984-91 XJ600 Euro, 1986-88 FZ600, 1986-90 YX600 Radian, 1992-98 XJ600 Seca II, 1992-2002 XJ600 Euro, 1982-83 XJ650 Maxim heads, 1983 XJ650 Turbo head, all XJ700 air-cooled heads, 1982-83 XJ750 heads, and all XJ900RK, RL, N/FN, and F heads.
$



HCP5828 OEM upper crankcase-to-cylinder jugs MOUNTING STUD, dark finish, alloy steel. Used at the front of the jugs to secure them to the boss in the upper crankcase. Use 1 per engine on all XJ550, 1984-85 FJ600, XJ650, XJ700 non-X, and all XJ750 non-X models, each:
$

HCP25978 Aftermarket upper crankcase-to-cylinder jugs MOUNTING STUD, bright finish, 18-8 stainless steel. Used at the front of the jugs to secure them to the boss in the upper crankcase. Use 1 per engine on all XJ550, 1984-85 FJ600, XJ650, XJ700 non-X, and all XJ750 non-X models. NOTE: this stud is approximately 2mm longer than the original, but will fit and function properly. Each:
$



HCP5829 OEM upper crankcase-to-cylinder jugs MOUNTING STUD, dark finish, alloy steel. Used at the front of the jugs to secure them to the boss in the upper crankcase. Use 1 per engine on all XJ900RK, RL, N/FN, and F models, each:
$

HCP25826 Aftermarket upper crankcase-to-cylinder jugs MOUNTING STUD, bright finish, 18-8 stainless steel. Used at the front of the jugs to secure them to the boss in the upper crankcase. Use 1 per engine on all XJ900RK, RL, N/FN, and F models. NOTE: this stud is approximately 2mm shorter than the original, but will fit and function properly. Each:
$



HCP5827 OEM cylinder jugs-to-upper crankcase mounting stud FLAT WASHER, alloy steel with a black finish, used at the front of the jugs to secure them to the boss in the upper crankcase. Use 1 per engine on all XJ550, 1984-85 FJ600, XJ650, XJ700 non-X, all XJ750 non-X, and all XJ900RK, RL, N/FN, and F models, each:
$

HCP25754 Aftermarket cylinder jugs-to-upper crankcase mounting stud FLAT WASHER, zinc-plated alloy steel with a bright finish, used at the front of the jugs to secure them to the boss in the upper crankcase. Use 1 per engine on all XJ550, 1984-85 FJ600, XJ650, XJ700 non-X, all XJ750 non-X, and all XJ900RK, RL, N/FN, and F models, each:
$

HCP25755 Aftermarket cylinder jugs-to-upper crankcase mounting stud FLAT WASHER, 18-8 stainless steel with a bright finish, used at the front of the jugs to secure them to the boss in the upper crankcase. Use 1 per engine on all XJ550, 1984-85 FJ600, XJ650, XJ700 non-X, all XJ750 non-X, and all XJ900RK, RL, N/FN, and F models, each:
$



HCP3494 OEM upper crankcase-to-cylinder jugs mounting stud NUT, used at the front of the jugs to secure them to the boss in the upper crankcase. Use 1 per engine on all XJ550, 1984-85 FJ600, XJ650 (except Midnight Maxim), XJ700 non-X, and all XJ750 non-X (except Midnight Maxim) models, each:
$

HCP24037 Aftermarket upper crankcase-to-cylinder jugs mounting stud NUT, made from 18-8 stainless steel, used at the front of the jugs to secure them to the boss in the upper crankcase. Use 1 per engine on all XJ550, 1984-85 FJ600, XJ650 (except Midnight Maxim), XJ700 non-X, and all XJ750 non-X (except Midnight Maxim) models, each:
$


HCP3495 OEM upper crankcase-to-cylinder jugs mounting stud NUT, used at the front of the jugs to secure them to the boss in the upper crankcase. Use 1 per engine on all XJ650 Midnight Maxim, XJ750 Midnight Maxim, and XJ900RK models, each:
$

HCP24038 Aftermarket upper crankcase-to-cylinder jugs mounting stud NUT, used at the front of the jugs to secure them to the boss in the upper crankcase. Use 1 per engine on all XJ650 Midnight Maxim, XJ750 Midnight Maxim, and XJ900RK models, each:
$



HCP5825 OEM upper crankcase-to-cylinder jugs locator STUD COLLAR or DOWEL PIN, *XJ550, 1984-85 FJ600, 1984-91 XJ600 Euro, 1986-88 FZ600, 1986-90 YX600 Radian, 1992-98 XJ600 Seca II, 1992-2002 XJ600 Euro, all XJ650, XJ700 air-cooled, XJ750 air-cooled, and XJ900RK, RL, N, FN, and F engines Use 1 per engine in the following position: #1 cylinder outer rear position at the base of the stud (where the stud threads into the crankcase). *NOTE: this pin is 14.00mm OD, and is specified for use on 1982-83 XJ550 Seca engines and on some XJ550 Maxim engines. 1981 XJ550 Seca and some XJ550 Maxim engines use the smaller (10.00mm OD) dowel pin in this position. Each:
$

HCP9351 OEM upper crankcase-to-cylinder jugs stud locator STUD COLLAR or DOWEL PIN, for all XJ550, 1984-85 FJ600, 1984-91 XJ600 Euro, 1986-88 FZ600, 1986-90 YX600 Radian, 1992-98 XJ600 Seca II, 1992-2002 XJ600 Euro, all XJ650, XJ700 air-cooled models, XJ750 air-cooled models, and all XJ900RK, RL, N, FN, and F models. Use 2 per engine in the following position: both #4 cylinder outer positions at the base of the stud (where the stud threads into the crankcase) on all models except 1992-1998 XJ600 Seca II and 1992-2002 XJ600 Euro-----these models use only 1 of these pins, at the #4 cylinder outer front position. Each:
$



HCP4696 OEM cylinder jugs-to-crankcase O-RING, for all XJ550, 1984-85 FJ600, 1984-91 XJ600 Euro, 1986-88 FZ600, 1986-90 YX600 Radian, 1984-91 XJ600 Euro, XJ650 (except Turbo), XJ700 non-X (air-cooled) models, all XJ750 air-cooled, and all XJ900RK, RL, N/FN, and F models. Use 2 per engine in the following position: both #4 cylinder outer positions at the base of the stud (where the stud threads into the crankcase). These o-rings fit underneath the jugs and into a recessed bore on top of the crankcase around the #4 outer long cylinder head studs and act as an oil seal. They should be replaced whenever the jugs comes off. Each:
$

HCP20844 Aftermarket cylinder jugs-to-crankcase O-RING, for all XJ550, 1984-85 FJ600, 1984-91 XJ600 Euro, 1986-88 FZ600, 1986-90 YX600 Radian, 1984-91 XJ600 Euro, XJ650 (except Turbo), XJ700 non-X (air-cooled) models, all XJ750 air-cooled, and all XJ900RK, RL, N/FN, and F models. Use 2 per engine in the following position: both #4 cylinder outer positions at the base of the stud (where the stud threads into the crankcase). These o-rings fit underneath the jugs and into a recessed bore on top of the crankcase around the #4 outer long cylinder head studs and act as an oil seal. They should be replaced whenever the jugs comes off. Each:
$



HCP22878 Aftermarket cylinder jugs-to-crankcase O-RING, for all XJ650 Turbo models. Use 2 per engine in the following position: both #4 cylinder outer positions at the base of the stud (where the stud threads into the crankcase). These o-rings fit underneath the jugs and into a recessed bore on top of the crankcase around the #4 outer long cylinder head studs and act as an oil seal. They should be replaced whenever the jugs comes off. Each:
$