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Old June 11th, 2021, 02:37 AM   #7
Mohawk
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Name: Chris
Location: Bristol, UK
Join Date: Feb 2016

Motorcycle(s): ZZR250, VFR800

Posts: 478
Sounds like you melted the left piston hence oil in the bore. Or badly scraped it whilst overheated. The bottom end oiling may have saved the crank bearings, but you will have to pull the top end. If the valves & cams survived you may get away with a head skim and get a set of over size or bigbore pistons with a rebore to suit.

Lesson learned here if engine runs hotter than normal. Stop & find the cause !

Hope you get it sorted.
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