March 16, 20215 yr Author 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.
July 17, 20251 yr 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.
July 18, 20251 yr 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.
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