motovita Posted May 4, 2011 Report Share Posted May 4, 2011 In Bultaco trials engines run only castor oil or semi-synthetic 2 strokeat 40:1 or 50:1 with super unleaded fuel Don't use Fully synthetic at all. Why? Quote Link to comment Share on other sites More sharing options...
cunpr Posted May 4, 2011 Report Share Posted May 4, 2011 Why? Yep, I've seen this asserted before but Why? Regards Paul C Quote Link to comment Share on other sites More sharing options...
bondy Posted May 9, 2011 Author Report Share Posted May 9, 2011 Chris just stick with the semi-synthetic two stroke at 50-1 , you don't need the fully synthetic .Just ride and enjoy your bike and stop trying to MOD it up with the latest this that and the other ..... ok keith ill take the addvice ive got i crack in the top of my alloy tank whats the best wat to seal it even if its just temp? Quote Link to comment Share on other sites More sharing options...
hewson Posted May 9, 2011 Report Share Posted May 9, 2011 Chris you may have to seek advice about alloy welding in your area , but you will have to make sure there are no signs of petrol or fumes in it , before anyone will tackle it ..... Quote Link to comment Share on other sites More sharing options...
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