andy.t Posted September 12, 2007 Report Share Posted September 12, 2007 Hi,being a bit stupid could somebody explain to me why you should not use synthetic oil in your gearbox,and would semi synthetic be just as bad. Regards Andy. Quote Link to comment Share on other sites More sharing options...
dfwilson Posted September 12, 2007 Report Share Posted September 12, 2007 Hi,being a bit stupid could somebody explain to me why you should not use synthetic oil in your gearbox,and would semi synthetic be just as bad.Regards Andy. I have an 03 SY-250 and use Mobil 1 Synthetic ATF in the gearbox. Synthetic motor oil may be too slick to make the clutch work well. Semi-synthetic? Who knows? DFW Quote Link to comment Share on other sites More sharing options...
trialsmm Posted September 12, 2007 Report Share Posted September 12, 2007 Amsoil make synthetic oils for motorcycle wet clutch applications. Not sure if others do? I've used Amsoil with good results, but now use Honda gear oil, just for ease of getting it. Quote Link to comment Share on other sites More sharing options...
amberlefty Posted September 12, 2007 Report Share Posted September 12, 2007 From http://www.trialspartsusa.com/tech.html Transmission oil: Recommend type: ATF DEXRON II Alternatives: NOTE: We have a few customers using the type "F" automatic transmission oil with good results. Dramatically reducing, and in one known case eliminating the clutch pack swelling. NOTE: GASGAS Spain recommends only Dexron III automatic transmission oil at this time. Oil type warning: Never use synthetic oil in the transmission~clutch. The synthetic oils are Quote Link to comment Share on other sites More sharing options...
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