guy53 Posted November 16, 2010 Report Share Posted November 16, 2010 As anybody tried to install TY 250B/C/D crankcase cover left and right on a TY 250A. Do they fit or do I have to change the flywheel ? Guy Link to comment Share on other sites More sharing options...
famousamos Posted November 17, 2010 Report Share Posted November 17, 2010 The flywheel side will work on a 74-75, the clutch side requires trans shaft and clutch from the 75-76 TY Fred check out how I modified the 74 clutch cover http://blackcatvintagetrials.com/2009/10/30/freds-fancy.aspx Link to comment Share on other sites More sharing options...
old trials fanatic Posted November 17, 2010 Report Share Posted November 17, 2010 The flywheel side will work on a 74-75, the clutch side requires trans shaft and clutch from the 75-76 TY Fred check out how I modified the 74 clutch cover http://blackcatvintagetrials.com/2009/10/30/freds-fancy.aspx I notice that the motor has also been bored out to 290cc. What piston do you use? Link to comment Share on other sites More sharing options...
famousamos Posted November 18, 2010 Report Share Posted November 18, 2010 I notice that the motor has also been bored out to 290cc. What piston do you use? When I had the work done, I was told that the piston was from a Kawaski personal water craft, lots of power, with most of our meets at 5000 ft to 9200 ft of alitude, the bike pulls real strong even with 2 head gaskets. Fred Link to comment Share on other sites More sharing options...
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