Tillerman6 Posted March 16, 2021 Author Report Share Posted March 16, 2021 I did get CMSNL to send me the right piston and I have the bike running now- still breaking it in slowly but all seems fine so far- fingers crossed- they said that the promotions on here cannot be corrected- third party advertisers and such- long train of custody once an ad is paid for and published. Quote Link to comment Share on other sites More sharing options...
MrMoto Posted Thursday at 04:29 AM Report Share Posted Thursday at 04:29 AM I recently was sent a 311 piston and have a 1977 TY250. How should I go about cutting (or filing) the piston skirt so it will clear the crankshaft? I have files. Quote Link to comment Share on other sites More sharing options...
feetupfun Posted yesterday at 09:55 AM Report Share Posted yesterday at 09:55 AM On 7/17/2025 at 2:29 PM, MrMoto said: I recently was sent a 311 piston and have a 1977 TY250. How should I go about cutting (or filing) the piston skirt so it will clear the crankshaft? I have files. Assemble the piston on the rod, mark up the piston where it hits then remove the piston and remove enough on those corners to give clearance of at least 1 mm. As for physically removing metal, hold the piston without deforming it and use a file or a grinder or a sanding belt or a sanding disc. 1 Quote Link to comment Share on other sites More sharing options...
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