rocksrock Posted July 22, 2009 Report Share Posted July 22, 2009 (edited) Being very new to trials riding and coming from an enduro background where all oils are synthetic, I'd like to know why people recommend non synthetic oils for the gearbox? Edited July 22, 2009 by rocksrock Quote Link to comment Share on other sites More sharing options...
nzralphy Posted July 22, 2009 Report Share Posted July 22, 2009 (edited) Cos we are cheap. Lots of us use ATF or regular gear oil and change it often, rather than buy an uber expensive gear box oil..... that are better and last longer. Remember that our bikes only make about 15hp. Edited July 22, 2009 by NZRalphy Quote Link to comment Share on other sites More sharing options...
jandyb Posted July 22, 2009 Report Share Posted July 22, 2009 Being very new to trials riding and coming from an enduro background where all oils are synthetic, I'd like to know why people recommend non synthetic oils for the gearbox? Hi What I know is that early Pro`s clutch fibres was destroyed by the additives in synthetic oil. Espesially when mixed with break fluid and coolant. Because of the construction of the engine this was not a question of "if" it was "when". Status now I am not sure of, but I know new Pro`s are delivered with GRO Gear Extreme 75W wich is a mineral oil. -Jan Quote Link to comment Share on other sites More sharing options...
pandelboy Posted July 22, 2009 Report Share Posted July 22, 2009 synthetic oils are not condusive with the surflex clutch plates , it can make them swell up . gas gas recomend mineral oil and most people use dexron Dii atf which is mineral based and also cheap. Quote Link to comment Share on other sites More sharing options...
rocksrock Posted July 22, 2009 Author Report Share Posted July 22, 2009 synthetic oils are not condusive with the surflex clutch plates , it can make them swell up . gas gas recomend mineral oil and most people use dexron Dii atf which is mineral based and also cheap. Thanks for the info gents - How are the surflex clutch plates different to the cork or kevlar plates used in the enduro/off road bikes? Quote Link to comment Share on other sites More sharing options...
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