What is involved in installing USD YZF750R forks on 89 FJ

[SILVERGOAT]

I am considering installing a set of USD YZF750R forks on my 89 FJ. Anyone do it yet or any better suggestions?

[Dan Filetti]

I keep wondering when someone is going to do a big-piston-fork on the FJ.  I can only assume that since its not been done, it's a real pain/ requires significant surgery.

Dan

[andyb]

Check length, check speedo compatibility, check fork travel, check steering head bearings + length, etc etc etc.


Anything fits anything, but some are more work than others.

[Pat Conlon]

Yes, Marc Rittner, Klavdy and Gary Mastro have the YZF750 USD's on their FJ's.

Here's a write up on the YZF750 fork mod on our FJ's: http://www.fjmods.btinternet.co.uk/MarcRittner2.htm

I have the FZR USD's on my '84 FJ which are the same forks as the YZF except that the YZF has external screw adjustments for compression and rebound settings. A nice feature.
On my FZR USD's the compression/rebound settings are done via the cartridge shim stacks internal to the shock. IOW to change the settings you have to take the FZR shock apart.
It took me only 2 disassembles to get the correct number of shims on the Race Tech FZR cartridges.
Once they're set, I have left them alone.
The YZF750 fork adjustments are made with a screw driver in 15 seconds.....Great feature for a track bike, but are external rebound/compression screw adjusters really needed on a street bike?

The USD fork mod is a nice up grade on our heavy FJ's. The front end is much more planted/stable.  Cheers!

[fj1250]

I have an almost complete YZF750 front end I'm willing to part with.
forks, upper and lower clamps, wheel, spacers, axle.
Make me an offer.

MC

[fj1250]

I also have a set of '94 FZR1000 forks (need rebuilding), complete triple clamps, and handlebars.
Make me an offer.

MC

[higbonzo]

I have been gathering parts to get the job done.  It has been over 9 month and I will hopeful have everything in the next 3 months or so.  I have keep the cost below $300 hundred so far, but I still need the fender, axle, and speedometer gear drive.  I am going to weld up the bump stops on the lower triple tree, and I am going with something like this on for the top mount  http://www.spieglerusa.com/cfm/sbk.cfm   or something similar to this brand.

Good luck.  I know Marc is a great guy and will help in anyway possible once you decide to get the project underway.

Later, Phil

[RichBaker]

I have an almost complete YZF750 front end I'm willing to part with.
forks, upper and lower clamps, wheel, spacers, axle.
Make me an offer.

MC

Where are you located?

[SILVERGOAT]

Thanks again guys for your input. Decided to stay with current set up;'95(non cartridge) YZF600 forks(Racetech refurb w/.95kg springs,seals,bushings and emulators),fender,wheel, speedo drive,cable and EBC 300mm rotors clamped by FZ1 master cylinder, Goodridge steel braided lines and blue dot calipers. This project has become a financial sink hole, time to stop. Not complaining, just like booze, know when to say enough is enough. Thanks again for all your help.

[higbonzo]

Thanks again guys for your input. Decided to stay with current set up;'95(non cartridge) YZF600 forks(Racetech refurb w/.95kg springs,seals,bushings and emulators),fender,wheel, speedo drive,cable and EBC 300mm rotors clamped by FZ1 master cylinder, Goodridge steel braided lines and blue dot calipers. This project has become a financial sink hole, time to stop. Not complaining, just like booze, know when to say enough is enough. Thanks again for all your help.

I am with you.  I have learned to decide on the mod I want to make, set a time frame, and purchase the least expensive parts I can over that period of time.  And then I do the project all at one time.  I have fund when I hurry a decision, and rush into a job, I tend to spend way more $$ than was necessary. 

No matter what the upgrade is you will be happy.  That is why it is called an "upgrade"

Later.......