wasntme Posted December 13, 2009 Report Share Posted December 13, 2009 It looks like all the previous TR34 owners have upgraded or broken their bikes as they have stopped asking questions! Therefore it is my turn to ask a newbie question. I've not done an oil change on my 1989 TR34 yet and I have no idea what oil to use. Reading other threads has left me bamboozled. I know I need 800cc gear oil as it states this on the Beta website. What is the best grade oil as I don't have to worry about having a Beta with a dodgy hydraulic clutch? Also I'm currently using up an old Motul 2T oil at about 70/1 with the expensive shell high octane petrol. The trusty Beta website says I should use Semi Synthetic so I was looking at either the PJ1 or Silkolene stuff. However on other threads the common suggestion is Castrol TTS, so is this just as good even for an older bike like mine? Any guidance is much appreciated. Rich Quote Link to comment Share on other sites More sharing options...
malcra Posted December 14, 2009 Report Share Posted December 14, 2009 can't speak directly for the TR34, but can for the earlier aircooled trials engines. They seem to be more sensitive to clutch drag/slip than other engines and I've tended to use Rock Oil Light Gear Oil in the Beta(s) as this seems to to provide the best performance. Silkolene LGO (which I'd used before in SWM / Rotax engines) caused clutch slip. For 2-stroke oil, I'm using Castrol TTS, which works well. I've tried Motorex (got give 5 litres) but seems to be designed specifically for KTMs it seems and not older bikes. Quote Link to comment Share on other sites More sharing options...
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