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Discussion Starter · #1 ·
Just got a vintage bike 1978 Suzuki GS750 MC. Changed the front fork oil to 180cc (6.1U.S oz) and the forks seem to be bottoming out when I hit a bump. I used SAE 20. Can anyone tell me what amount of oil has worked for them?
Thanks
 

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Probably have to do a search, or find a manual. But that does sound like about the right amount. Too much and they may go bang, as in solid over a bump. Proper fork oil is always best, but I have used other oils. Any change the forks need air?

UK
 

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I think UK means, any chance the forks need air? Some do require air. Mine don't so it isn't a given. But UK might be onto something.
 
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