R1 forks witrh a speedo drive

[fj1289]

Mike (mynewbike) <br><br>There are a few couple of ways to do this (based on 1999 R1 forks):<br><br>R1 uses a 22mm front axle and non-standard 60/22 bearings. (By the way, Yamaha parts fiche lists the wrong bearing numer for these applications - they list the standard bearing size 6004. THIS IS WRONG!!! Cost me a bit of money to get the machine work done to fix that surprise when I first tried this swap on my FJ1200)<br><br>1. The best is to use a Thunderace (YZF1000) front rim. You will need to remove 8mm from the shouldeer on the inside of the left fork leg. Brakes and calipers line up properly. R1 rotors are 298mm diameter if I remember correctly.<br><br>2. Use a 94/95 FZR1000 front rim or YZF750 front rim. I think the rim will line up by removing the same 8mm from the left fork leg. The brake calipers and rotors will not line up and will require caliper brackets to be made to line them up. The advantage here is you get to keep the 320mm rotors. <br><br>3. I did manage to adapt an 88 FZR1000 rim using different wheel bearings and a 20 mm axle. I had to bush the axle to fit the fork leg - I personally don't think this is the best solution - but I did run the bike this way for several months before finding a good Thunderace rim to use. <br><br>Finally, for all these - the R1 stem is too short to use in the FZR steering head. The R1 stem is also very slightly larger at the base than earlier FZR stems - this means the FZR stem fits very loose in the R1 lower triple clamp. The best solution is to have a new stem fabricated - Jim Whipple (Dragracer1951) did a very nice job on a couple of stems for me. (though I may need to mod the design I sent him - it may need to be slightly shorter)<br><br>Also, you may have to make some mods to the steering locks as well as the ignition switch mounts.<br><br>Overall, very doable - just be prepared to solve several small problems as you go. <br><br>Good luck and keep the list updated, Chris <p></p><i></i>

[asmeninis]

Hello,<br>I'm also in this business.<br>2003 R1 fork legs, 1993 FZR 1000 triple and wheel + axle.<br>To assembly this into one piece I use FZR's axle with the bushings to clamp it into the R1's fork (22 and 28mm diameter).<br>The brake caliper relocation plates. Actually I'm bit worring about. Since it's a brakes. The plates were tested by Solid Works, but anyway..<br>If anyone wish, I can post a drawings.<br>My note regarding the line up, I choose to machine the spacer for the left side, removing the speed clutch (I'll use electronic bycycle speedo). The spacer thickness is 28mm. Right side spacer should be thicker for a 1.5mm.<br>Also the front end of the bike lower so much. Which cost mass center moving forward. This will afect the bike behaviour.<br>There could be need to upgrade the fork springs as well. <p></p><i></i>

[mynewbike]

Thanx for the info,I will keep my eyes open for a YZF front rim Ace or Cat.<br>What kind of bicycle speedo are u using?<br>Does anyone else have any comments on that?<br>Mike <p></p><i></i>

[IceCream Bandit]

I use a Sigma bike speedo, it's good up to 205km/h after that it jumps between largely distanced numbers. Other than that I've had no problems with it. <p></p><i></i>