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USD fork conversion advice

Started by FJ-Heretic, October 01, 2017, 12:13:07 AM

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MarioR

Quote from: Pat Conlon on September 24, 2025, 03:24:17 PMHappy to help Mario

FYI if you go with FZR1000 front end...the stock FZR springs (.77kg/mm) are too light for our heavier FJ's.
 As we know, the springs control the suspension but the valves control the springs so with the heavier springs you should change the valves (unless you like boing boing boing pogo stick fork action)

After 2 variations, here's my final spec: 

Oil level: 110mm
Sag: 35mm
Spring: 34.7 x 340 .95kg/mm (you could go with heavier 1.0kg/mm springs) 
Race Tech Compression valve: FMGV S2045
Compression bleed #55 drill (.052in.)
Compression stack C38
Rebound stack R20
Rebound needle base setting 1 turn out
Oil 125/150 Golden Spectro cartridge oil

This should save you some work.

Cheers

Pat

Pat, you are the man!
Will need to organize for you nice case of Moosehead Canadian LAGER :drinks:
It does not matter how slowly I go as long as I do not stop.

Pat Conlon

Thanks Mario, I'll pass on the beer but if we ever meet, a cuppa joe will work.

Let us know how your mods turn out.

Pat
1) Free Owners Manual download: https://tinyurl.com/fmsz7hk9
2) Don't store your FJ with E10 fuel https://tinyurl.com/3cjrfct5
3) Replace your old stock rubber brake lines.
4) Important items for the '84-87 FJ's:
Safety wire: https://tinyurl.com/99zp8ufh
Fuel line: https://tinyurl.com/bdff9bf3

MarioR

Quote from: Pat Conlon on September 24, 2025, 05:22:04 PMThanks Mario, I'll pass on the beer but if we ever meet, a cuppa joe will work.

Let us know how your mods turn out.

Pat

You got it Pat. :morning1:

Thank you

It does not matter how slowly I go as long as I do not stop.