'78 GS750 fork oil level/air gap

[Mary Hinge]

As part of the recommissioning check list I wanted to change the fork oil. I appreciate that I might need/benefit from new springs too at some point but until I get some miles on her I'm not able to tell. I've found the capacity spec (180cc) in the workshop manual link Nessism kindly posted for me which I assume would be the amount needed if the forks have been completely stripped & dry which mine won't be as yet. Would anyone be able to advise on the oil level/air gap with springs in (or out) for this model please, many thanks.

[RichDesmond]

As part of the recommissioning check list I wanted to change the fork oil. I appreciate that I might need/benefit from new springs too at some point but until I get some miles on her I'm not able to tell. I've found the capacity spec (180cc) in the workshop manual link Nessism kindly posted for me which I assume would be the amount needed if the forks have been completely stripped & dry which mine won't be as yet. Would anyone be able to advise on the oil level/air gap with springs in (or out) for this model please, many thanks.

If there's a spacer set the air gap to 120mm. If it's all spring, set it to 140mm. That's measured with the spring and spacer (if any) removed and forks fully compressed.

[Mary Hinge]

Thanks Rich, much appreciated.

[cowboyup3371]

Honestly, don't worry about the air and instead get some Sonic Springs straight-rate springs and 10w oil. The air that is naturally in the tubes is all you'll need.