TIMEtoRIDE wrote:

MiGhost wrote: . . . As far as lowering the rpms, The final drive gearing (32/11 2.909:1)is the same on all the XJ series. . . That sounds like the old XS-750 final drive ratio. The 650/750 XJ's have a 4.129:1 ratio.

That number (4.129:1) is probably the overall gearing as there are three different reductions in the system (Transmission, Middle Drive, Final Drive). I have not researched into all the little details as yet. Deffinate plans for it though. Looking into the possibility of round a 25% - 30% overall reduction.

TIMEtoRIDE wrote:

MiGhost wrote: Time: That bike was one of my driving forces. I just did not like the looks of the 535 wheels on that bike. Weight, and capacity is considerably lower. Model weight/capacity XV535 414/505 It would appear that the Virago 535 can only hold a 91 pound lady?? I would guess our Spanish friend bought what he could find and that the above spec has to be a typo (??)

That spec was taken directly from the Haynes/Clymer manuals. I have not yet been able to locate the factory manual to verify.

TIMEtoRIDE wrote:

Awesome job sorting all this stuff out btw!

Thank you.
I have a very annoying habit of having to know exactly what I am working with. It saves money, and headaches in the long run.

BTW. I am finding out a lot of very interesting things about the yamaha engineering proces.

Ghost

MiGhost wrote:

TIMEtoRIDE wrote: MiGhost wrote: . . . As far as lowering the rpms, The final drive gearing (32/11 2.909:1)is the same on all the XJ series. . . That sounds like the old XS-750 final drive ratio. The 650/750 XJ's have a 4.129:1 ratio. That number (4.129:1) is probably the overall gearing as there are three different reductions in the system (Transmission, Middle Drive, Final Drive). I have not researched into all the little details as yet. Deffinate plans for it though. Looking into the possibility of round a 25% - 30% overall reduction.

Well, I just went and checked, and you're right; looks like 2.909:1
I managed to find some facts in this here post by Woot.

This is incredible! I wish more builders posted like this! Keep it
up!

Hi MiGhost!

I was checking the back brake on my XJ650 today and for grins thought I'd throw my XV700L rear on to see ow it's going to look...trouble is that I couldn't actually get it on with the brake cover on.

Now I just pulled my existing wheel..didn't drop the final drive or anything so that is my question...do I need to pull the final drive, mate everything up, wiggle it in and then slide the axle through?

T'anks!

ouchie wrote:

do I need to pull the final drive, mate everything up, wiggle it in and then slide the axle through?

That would probably be the best bet. The stock XJ swingarm is designed only to allow a 130 tire to be installed without removal of the final drive. The XV700L came with a 140 tire stock.

This is the process I followed. (bike stripped to bare frame, swingarm removed)
1. Mount wheel, and brake plate to final drive using axleshaft through final drive for alignment (Do not forget the spacer that goes between the wheel, and final drive).
2. Slide brake/wheel/final/driveshaft assembly into swingarm.
3. Align driveshaft with u-joint.
4. Remove axleshaft from final drive side, and place into swingarm/brake side (collar/washer between brake plate, and swing arm, washer/castle nut on final side ).
5. Secure assembly to swingarm (4 nuts on final drive, castle nut on axleshaft, pinch bolt on swingarm).

Also, make sure you use the 700 brake plate. The 650 brakeplate is a different size (smaller I believe?) Can you confrim this please?

Ghost

Yep you bet it is definitely smaller!

When I do the swap I'll try to remember to take a side-by-side pic of them with a tape measure reference.

Thanks for the info!

MiGhost wrote:

ouchie wrote: do I need to pull the final drive, mate everything up, wiggle it in and then slide the axle through? That would probably be the best bet. The stock XJ swingarm is designed only to allow a 130 tire to be installed without removal of the final drive. The XV700L came with a 140 tire stock. This is the process I followed. (bike stripped to bare frame, swingarm removed) 1. Mount wheel, and brake plate to final drive using axleshaft through final drive for alignment (Do not forget the spacer that goes between the wheel, and final drive). 2. Slide brake/wheel/final/driveshaft assembly into swingarm. 3. Align driveshaft with u-joint. 4. Remove axleshaft from final drive side, and place into swingarm/brake side (collar/washer between brake plate, and swing arm, washer/castle nut on final side ). 5. Secure assembly to swingarm (4 nuts on final drive, castle nut on axleshaft, pinch bolt on swingarm). Also, make sure you use the 700 brake plate. The 650 brakeplate is a different size (smaller I believe?) Can you confrim this please? Ghost

I'm just curious, would you have to do this procedure every time you changed the tire or got a flat?

Maxim-X wrote:

I'm just curious, would you have to do this procedure every time you changed the tire or got a flat?

With the 150 tire, Yes.
There is just not enough room between the final drive, and swingarm leg to allow the drive hub to slide into place. The Virago swingarm is approx 10-12mm wider at the axleshaft allowing it to be done.

With the spoked wheel you are looking at pulling the wheel anytime you have a flat. While there are tubeless spoked wheels available. These wheels are not tubeless. Just one of the cons of spoked wheels.

The only critical points on the swingarm are the torque tube, and pivot points. The right side leg only serves as a mount for the shock, and a locator for the axle shaft. The swingarm leg can be modified to provide the necessary clearance. I am looking into some possible mods to the swingarm to reduce, or eliminate this problem (I don't like fussing with the driveshaft u-joint either. Major PITA).

Ghost

Would it be possible to adapt the Virago swingarm to the XJ?

Orange-n-Black wrote:

Would it be possible to adapt the Virago swingarm to the XJ?

Without a doubt. I am in the process of doing this myself. You need narrow the swingarm up between the pivot points approx 5-10 mm. It is just a stamped locator/reinforcement plate between the torque tube, and the right leg. The Virago swingarm will give approx 2" stretch to the rear also. But that is another mod to be done and written up.

Will this make fitting the 150 easier? NO!
When you narrow the swingarm. You also pull the right leg inward.

I am looking into a mod that will make it a 2-3 bolt operation with no further need to pull the final drive assembly. Very much like a true single side swingarm.

Ghost

MiGhost wrote:

Orange-n-Black wrote: Would it be possible to adapt the Virago swingarm to the XJ? Without a doubt. I am in the process of doing this myself. You need narrow the swingarm up between the pivot points approx 5-10 mm. It is just a stamped locator/reinforcement plate between the torque tube, and the right leg. The Virago swingarm will give approx 2" stretch to the rear also. But that is another mod to be done and written up. Will this make fitting the 150 easier? NO! When you narrow the swingarm. You also pull the right leg inward. I am looking into a mod that will make it a 2-3 bolt operation with no further need to pull the final drive assembly. Very much like a true single side swingarm. Ghost

I just measured my 750RL & 900 swingarm across the pivot point & its 285mm how does that compare to the Virago?

take the right shock off, i think it'll go

ol_750 wrote:

I just measured my 750RL & 900 swingarm across the pivot point & its 285mm how does that compare to the Virago?

Just measured the virago swing arm at 292mm at the pivot.

The measurement at the final drive (inner flange to swingarm at axle shaft)
XJ750 142mm
XV700 158mm

The virago swingarm is.
7mm wider at the pivot.
16mm wider at the axle shaft.

Swingarm length (pivot center to axle shaft center)
XJ750 420mm
XV700 465mm

Hope this helps
Ghost

Polock wrote:

take the right shock off, i think it'll go

With the 150 tire. The point of contact was 3/4 the way up on the swingarm. Well clear of the shock (Swing arm off bike). The interference was not allowing the drive hub to slip into place.

It may be possible to loosen, and move the final drive to get the space need to allow the drive hub to slip in.

Ghost

Onto the rear.
Surprisingly enough. The rear is a straight swap with the following exceptions. The 650 uses a different brake plate and will require the use of the brake plate from one of the following. 700 Virago, 700 Maxim/Maxim X, 750 Maxim/Seca, 920 Virago.

84 XV700L Rear wheel mounted to XJ750K frame (Test fit)

Tire clearance at swingarm with Pirelli Route 150/90-15 M/C 74H tire mounted (Test fit)




On the 550 model: unsure if this would work with the chain drive.
On the 650 model: Get the wheel, and brake plate.
On the 700 & 750 models: Get the wheel only.

Note: The fork inner tube length on the 700 Virago is 735mm compared to the 670mm on the XJ750, and 608, on the XJ650. This will raise the front of the bike slightly and increase the rake by a couple degrees (old school chopper trick). This will give a 2.5" over fork on the 750, and a 5" over fork on the 650. I am sure that you can get shorter fork tubes through Forking by Frank to return the bike to the stock ride height if desired.

If you have made it this far, and paid close enough attention. You will note that the same can be done with the 5-spoke wheels available on the 85-86 Maxim/MaximX also.

Ghost[/quote]



would this wheel fit on the 750 maxim as a direct fit? www.ebay.com/itm/REAR-...500wt_1289