rob b Posted July 13, 2014 Report Share Posted July 13, 2014 Would appreciate assistance from anyone who has fitted a Mikuni VM26 to a 250 Ossa Gripper. Have tried a number of main & pilot jets, needle sizes etc without real success in getting the bike to run right. Quote Link to comment Share on other sites More sharing options...
longlegscanbeuseful Posted July 15, 2014 Report Share Posted July 15, 2014 I had the same problems on my 350 and ended up switching to an OKO from a 250 gasgas. Never looked back, it runs sweet, the plug is always a nice colour and uses less fuel. Quote Link to comment Share on other sites More sharing options...
bisby Posted July 15, 2014 Report Share Posted July 15, 2014 My carb is a 28mm mikuni but the bike is a 250cc, main jet is a 180 (did use a 190) and the pilot is a 3.0 (did use a 2.5) needle is 5L3 on the mid grove and the slide is a 2.5 Good to know about the OKO longlegscanbeusful, Steve. Quote Link to comment Share on other sites More sharing options...
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