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Old 02-14-2014, 01:28 PM
Theon Theon is offline
Motorized Bicycle Elite Member
Join Date: Jan 2014
Location: FNQ Australia
Posts: 1,440
Default Re: Build it, Break it, Repair it, Restart...

Check under the piston crown.
Is it black, then she's been getting hot and possibly to lean, causing piston to expand and scratch.
It it's still shiny then it maybe rich.
These motors often come with a gut full of metal swarth from new, which would help to scratch up your barrel.
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