Fork oil and quantity for n '84 GS750ES?

[kiwijetpilot]

Hi folks,

Still waiting for my manual, so could some kind soul with a service manual tell me the fork oil grade and quantity for a GS750ES, 1984 vintage?

Cheers!

[Macmatic]

I'm not around my manual right now but I just looked this up yesterday so:

I'm 90% sure it calls for #10 fork oil, but if you search here you'll see people have a lot of opinions on that.

Volume is 308ml the book also gives a spec for distance from the top which is what I used, but that only works if the forks are off the bike.

I made a simple jig with a wire hook and vinyl tube that I could hang into the fork leg and have the bottom of the tube at the spec distance from the top then I just filled it to just past the tube aand drew it back out to get the right amount/distance.

Good luck!
/\/\ac

[kiwijetpilot]

Thanks for that... I did the obvious thing and called the local Suzuki agent. After much consultation with ancient data books, the guy told me it should be 230ml.

230... 308... hmmm!

Well I guess I can just add 230, if that doesn't work, I guess I could up it to 308.

I wonder if the difference is to take account of trapped fluid in the anti-dive system? I have just completely disassembled my forks to replace the seals, so they are currently completely empty of oil.

Any other ideas...?

[Macmatic]

This is from the factory manual, for what its worth.

Fork Oil
- For the fork oil #10
- Capacity 308ml or 10.4 US oz.

Fork Oil Level (which is the only thing I really paid attention to
-
"Note: When adjusting the fork oil level, remove the fork springs and compress the inner fork tube fully"
- Use special tool 09943-74111 (which I used my wire and tube fixture for)
- Set the height at 170mm or 6.7in from the top of the compressed inner fork tube.

This is from my '84-85 GS750ES GS700ES factory manual. I'm not saying it can't be wrong, just that that is what it says!


/\/\ac

[kiwijetpilot]

Well I'm happy to go with 308ml. You can always take some out! I put 230 in last night, plus a 20ml spacer to up the preload a bit. I noticed that the springs are progressive - are the originals progressive as well? I assume they aren't.

Thanks for the info, much appreciated.

Simon