April 17, 201115 yr just got another ty 80 for my lad as i got one last week and it was a bag of s*** no power etc took barrel off and it had been bored to the max +2mm so i put it in the shed then friday i dropped on another got this home and it rattles like crap its been bored out to +1.00mm there is no wear in big ends or little ends and piston and barrel seem good, have recipts with it where its had £330 spent on the engine new conrod kit ends and rebore etc at trail and trial, the rattle is the same when hot or cold sounds like the piston is tapping on the spark plug but it isnt if you grip the barrel and head itdoes go away any ideas as its driving me daft, cheers mick Edited April 17, 201115 yr by skippy1234
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