yzf 600 forks

cherrylog gypsy · April 02, 2010, 08:19:58 AM

I am getting ready to put a set of 99 yzf 600 forks wheel and brakes on my 90 fj.
I'll be using the stock fj triples to retain the switch and bars.
The fj forks are 41mm same as the yzf although the fj are spaced slightly wider.
Should be fairly easy except i havent figured out the fender yet.
I will document the process and share the info!

Fred · April 02, 2010, 10:10:39 AM

Use a YZF fender, there are cool carbon fiber ones available. I think if I remember correctly you will need to Fab an adapter for the clip ons. I can't remember why at the moment, the YZF forks shorter, maybe? Anyway I'm sure someone who has done this mod will chime in.

cherrylog gypsy · April 02, 2010, 11:06:31 AM

Quote from: Fred on April 02, 2010, 10:10:39 AM
Use a YZF fender, there are cool carbon fiber ones available. I think if I remember correctly you will need to Fab an adapter for the clip ons. I can't remember why at the moment, the YZF forks shorter, maybe? Anyway I'm sure someone who has done this mod will chime in.

the yzf forks are about 15mm shorter no problem
and i'll be using the fj triple clamps so no clipon issues!

JCainFJ · April 02, 2010, 02:06:32 PM

Find a set of 1987-88 fzr1000 t/clamps and everything will work. The FZR t/clamps have the same offset as the FJ and the same tube c/l dimensions as the YZF 600 so the steering geometry stays the same and all the YZF parts fit with no mods. The FZR t/clamps even use the same bearings as the FJ. I've used this setup on my FJ for over 10 years.

cherrylog gypsy · April 02, 2010, 05:46:17 PM

Quote from: JCainFJ on April 02, 2010, 02:06:32 PM
Find a set of 1987-88 fzr1000 t/clamps and everything will work. The FZR t/clamps have the same offset as the FJ and the same tube c/l dimensions as the YZF 600 so the steering geometry stays the same and all the YZF parts fit with no mods. The FZR t/clamps even use the same bearings as the FJ. I've used this setup on my FJ for over 10 years.

the fzr clamps will take the fj clipons?or do you use the fzr clipons?
ps thanks for the info

JCainFJ · April 02, 2010, 09:02:21 PM

The FJ bars will work with the FZR1000 t/clamps. The 6mm indexing bolt will not line up, but yes the FJ bars will still work. Some folks want to use the indexing bolts so I have made adapters.
Upgrade the YZF forks with Race-Tech valves and springs. I install 1.0KGMM springs in the conversions I've done.

simi_ed · May 26, 2010, 07:31:15 PM

OK, I could really use some help here:
I have the fzr1000 t/clamps bolted up, fork legs in place and I'm trying to install the front wheel. When I pull up the axle to anything near correct torque, the side load on the front wheel bearings basically stops the front wheel from turning. I have a top hat spacer on the curb (throttle) side of the bike, and the speedo drive on the left side. No additional spacers, and I get about 0.100 to 0.125" deflection on the legs when I try to tighten. Did I miss something?

Any & all advice appreciated (Klavdy excepted, naturally

).

TIA,
Ed

Arnie · May 26, 2010, 08:34:31 PM

Ed,

Side loading on the wheel bearings should not matter. Do you have the correct spacer INSIDE the wheel between the bearings? That's most likely your problem.

Cheers,
Arnie

ccsct203 · May 26, 2010, 08:53:28 PM

Quote from: JCainFJ on April 02, 2010, 09:02:21 PM
The FJ bars will work with the FZR1000 t/clamps. The 6mm indexing bolt will not line up, but yes the FJ bars will still work. Some folks want to use the indexing bolts so I have made adapters.
Upgrade the YZF forks with Race-Tech valves and springs. I install 1.0KGMM springs in the conversions I've done.

I did the 1988 FZR1000 forks and triple with a 1992 FZR1000 front rim, no issues here

simi_ed · May 26, 2010, 10:05:25 PM

OK, I think I found the problem. I do have all the correct parts, and there are no additional spacers required, so the only possible option was the bearings not being far enough into the wheel. Sure enough the throttle side bearing went in another 0.020-0.030" when enough force was applied! This cleared up the issue: I can torque the axle & the wheel still spins like it's on new bearings (it is!).

Thanks for advice! Tomorrow, a new brake line from the MC to the splitter, 1" longer.

2 1/2 weeks till the rally, no problem

.

Mark Olson · May 27, 2010, 12:29:39 PM

Ed,

That is great news on the upgraded front end .

hope ya get some shake down before the rally.

raskco · June 01, 2010, 07:58:01 AM

""""""""""Find a set of 1987-88 fzr1000 t/clamps and everything will work. The FZR t/clamps have the same offset as the FJ and the same tube c/l dimensions as the YZF 600 so the steering geometry stays the same and all the YZF parts fit with no mods. The FZR t/clamps even use the same bearings as the FJ. I've used this setup on my FJ for over 10 years."""""""""

I have a 1986 and want to do this set up... will this work on a 1986? is it the same as a 90?

What all do I need? tripple tree, forks, rim and calipers? is that it?

andyb · June 01, 2010, 01:15:55 PM

Should work.

Everything from the forks down, and the different triples.

Pat Conlon · June 01, 2010, 02:46:25 PM

Ed, you will those cartridge forks......

simi_ed · June 01, 2010, 08:00:49 PM

Well, things are not always as they appear. I have a bent right fork tube. Bill P has generously offered to take a whack (OK, look, not whack) to see if he can straighten the leg. In the meantime, I'm back to OEM '89 parts and will have to make due until post-WCR. I got about 200 shake-down miles on the deinstall-reinstall OEM parts and everything is still as good(?) as ever.

It's usable, and it's gonna get used! Rally in 1 1/2 weeks!!!

Paddy, I can bring a few spare chairs & even a spare sleeping bag

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yzf 600 forks