yammafan Posted November 9, 2012 Report Share Posted November 9, 2012 I was just wondering if the only difference between the Ty250 and 350 is simply the engine size/bore? I can only get hold of a workshop manual for a 350, and wondered how relevant it was to my 250. Looks pretty much the same, but my friend said that once about a girl he met in Thailand... Quote Link to comment Share on other sites More sharing options...
grahamjayzee Posted November 9, 2012 Report Share Posted November 9, 2012 Looks pretty much the same, but my friend said that once about a girl he met in Thailand... Hahahahahahaha Quote Link to comment Share on other sites More sharing options...
sherpa325 Posted November 9, 2012 Report Share Posted November 9, 2012 If my memory serves me correctly, the 250 has a cast iron liner and no flywheel weight, whereas the 350 has a nickasil barrel with a thiner liner that cant be bored and a metal band shrunk on the flywheel- so the bottom end is the same and the top ends can be interchanged. Quote Link to comment Share on other sites More sharing options...
chuckindenver Posted July 23, 2013 Report Share Posted July 23, 2013 250s are known to have broken cases were the swingarm bolt goes through... 250 pistons you can get,,,350 pistons...not so much Quote Link to comment Share on other sites More sharing options...
jse Posted July 23, 2013 Report Share Posted July 23, 2013 If my memory serves me correctly, the 250 has a cast iron liner and no flywheel weight, whereas the 350 has a nickasil barrel with a thiner liner that cant be bored and a metal band shrunk on the flywheel- so the bottom end is the same and the top ends can be interchanged. My understanding also, except the 350 bore is chrome, not Nikasil. And Chuck's correct, 350 pistons are like hen's teeth to find here in the U.S. I think Bob Ginder at B&J has some special made now and then, but the OEM pistons/rings are very rare. Jon Quote Link to comment Share on other sites More sharing options...
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