Maintenance & Technical > KX250 / KX125

New piston

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GRARA:
Quick question.....Ive just fitted a new piston to my 98 KX250,Ive fitted a larger piston than the last one that was in it because there was too much play....ive ran the bike in correctly but it gets spluttery at high revs and doesnt seem to have the same power...do i have to play around with the carb now that its got a slightly bigger piston?

Candyman:
Wow.... where to begin....
How did your bike run before the piston replacement?

GRARA:
Bike was running absolutely spot on...no problems whatso ever

Candyman:
How much bigger is the new piston?
Did you have the cylinder plated, sleeved, or bored?

Foxx4Beaver:
ring end gap...piston to cylinder clearance, were these checked?

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