| The Formula | |
| The way this works is basically like this. The stock YZF600R 97-99 rear wheel assembly is slightly wider than the stock FJ parts. You must acquire all of the parts between the forks of the swingarm from the YZF to make this work. The way it goes is 8mm off of either side and 3mm off of the sprocket carrier on the outside where the sprocket bolts up. The rest of the swap is a | |
| simple mater of making the brake torque arm fit by creating an offset. It will not clear the tire without this modification. The stock FJ torque arm was used. It is steel and therefore really easy to work with. The pictures should do a good job of telling the rest of the tail. | |
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You can see where the sprocket carrier was machined here. The distance from the center of the rim to the sprocket surface is obviously just a touch large so machining this surface is the simplest way to take that up. Changing the inside cushdrive, the rubber and the spacer would be much more complex than this and would change the amount that needs to come off the the outer spacer below. This is a simple solution to the issue and once the sprocket is mounted this will never be seen. The amount lost does not effect the mounting of the sprocket at all. Once this is completed the studs must be reinstalled using red Lock Tight with the dimpled end facing in toward the rim. The sprocket is then reinstalled as normal. |
| This is the
best way that I could come up with to show this part. It is the outer left
spacer that seats up in the outside of the cushdrive. This part is machined
8mm shorter in width. I put it next to a part of known dimension intentionally.
You should have an idea of how large the factory chain adjusters are. The
spacer is turned on it's side to show it's width. This should be a very
straight forward part to modify. I would not have minded doing this myself.
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The brake caliper
arm would be a tricky part to modify without a machine shop just like the
cushdrive. You can see on the right side where it lost the needed 8mm of
material. The part is notched out to clear the swingarm and allow a bit
of play.
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| This is the brake torque arm. This offset is meant to mount on the swingarm side. The end that mounts to the brake caliper remains stock. This is not a very pretty solution but, it does the job and is well hidden by the rest of the bike. I am going to pant this a fairly flat color before I mount it so that it will tend to disappear when you look at the bike as a whole. The welds are fine the workmanship is superior but, the part is still just not very attractive. |  |
| Before I finish I should mention that this all threads onto the stock rear axle. You knew that, right? Cain is working on using the YZF axle to remove almost another pound of unsprung weight but, I think I will stick with the stock setup. The trick is to add a spacer on the outside of the swingarm to pull the YZF axle up tight. I am not sure about this. It is an esthetic hang up. If all I was worried about was how it was going to work this project would have been completed weeks ago. |
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