1982 Maxim fork parts question

Disassembled my front forks today. I have a 13cm steel spacer tube in between my tube cap (part with air fitting) and my spring. I don't see this in any of my manuals. (including XJCD online).
Is this a modification added by a PO, or just poorly drawn lines 35 years ago in Japan?

Sorry, no pics. Don't have my phone at work.

Thanks guys.

 

That's your answer! That spacer should be there.

 

part 22+45 ?

http://www.partzilla.com/parts/search/Yamaha/Motorcycle/1982/XJ650J/FRONT+FORK/parts.html

 

part number 22 in the diagram. I've bookmarked that site, thanks.

 

22 is also part 45 on the parts list do not know why

 

new question. manual list fork spring free length at 606mm, mine are only 464mm. As measured from top to bottom coil, setting on my tool box.

 

my 650G fsm says 606 80 and 81 650 uses same spring and does not have the 13 cm spacer

haynes manual has spring length as 467mm
for 650J

 

I'll run with that.

Any recommendations on fork oil? 200ish lbs rider, novice.

 

haynes suggests
750J------------------- 750UK



factory service manual 750J

 

15W fork oil is what I run. The published recommendations are for somewhat "less prosperous" riders. You might have to play around with it a bit until you have a good compromise between damping sufficiently, and not being too harsh over sharp bumps.

 

Just decided to go with 10w

 

Disassembled right hand fork and found spring seat (between spring and spacer number 23 on the pic) is missing. Could I just use a proper sized washer, or am I risking damage to the internals of my tube?

 

Schrader valve is buggered as well. Just can't win this week.

(FIXED THE BUGGERED VALVE. WAS ABLE TO GET A EXTRACTOR IN TO IT AND REMOVED FROM THE HOUSING.)

 

OK. Barring any last minute advice, I'm going to reassemble as it stands.
Not sure how long it ran without spacer but Len does not list the part and it does not look any worse for wear.

 

Actually, we do have the spacer and the spring seat, drop me a note if you decide that you need them.

HCP8284 OEM inner fork tube SPRING SPACER TUBE, fits either side. Used on all 1982-83 XJ650 Maxim and 1983 XJ750 Maxim and Midnight Maxim models. Each:
$

HCP8239 OEM inner fork tube SPRING SPACER SEAT, fits either side. Used on all 1982-83 XJ650 Maxim, 1982 XJ650 Turbo, XJ750-D, XJ750-P (24L and 37H models), and all XJ750 Maxim and Midnight Maxim models. Each:
$

HCP20994 Aftermarket inner fork tube SPRING SPACER SEAT, fits either side. Used on all 1982-83 XJ650 Maxim, 1982 XJ650 Turbo, XJ750-D, XJ750-P (24L and 37H models), and all XJ750 Maxim and Midnight Maxim models. Each:
$