August 5, 200719 yr When cold my pro has some piston slap but is fine when running warm, if i were to replace the piston would the bore be ok and how much is the gas gas 280 pistons.
August 8, 200719 yr Hi there, I'm guessing you're in the UK, try one of the local GG dealers for a price for a piston kit. Usually, the PRO motors are really quiet in the piston area, maybe the bike was drowned and that can distort the piston causing it to rattle. In this case a new piston would cure it. If there is wear in the bore, you can get pistons in slight oversizes A, B, C, D which may offer a low cost alternative to getting a replated cylinder. In the past, I have fitted a D piston into a worn A bore and achieved a good outcome. Best to renew the head O rings at the same time. Bye, PeterB.
August 14, 200719 yr My 02 was getting really noisy.........replaced piston and barrel. Runs nice and quiet now.
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