piggywiggywoo Posted December 8, 2003 Report Share Posted December 8, 2003 My 250 pro produces a pronounced rattle @ tickover especially on the overrun.the symptoms are typical of a worn top end ,the bike has not done much work and i have replaced the rings and inspected the bore which is in good order.i can only imagine the barrel is worn. Any suggestions before i invest in a replacement barrel and piston. ear plugs maybe! Quote Link to comment Share on other sites More sharing options...
munch Posted December 8, 2003 Report Share Posted December 8, 2003 top end will rattle as you pick up throttle as well Quote Link to comment Share on other sites More sharing options...
jtt Posted December 9, 2003 Report Share Posted December 9, 2003 Before replacing the cylinder, measure the piston to cylinder wall clearance. I don't have the spec off the top of my head, but your dealer or importer should be able to get it for you. What's the piston look like? Quote Link to comment Share on other sites More sharing options...
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