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kdx 220 piston help please.
Posted: 08:26 pm Feb 20 2012
by camarochris
i just picked up a 97 kdx 220.I pulled the head today to make sure it didnt have the stock gernade in it.thank god it doesnt but i cant id the piston.its not a wiseco part number.the numbers are a7959 then in the middle of the piston 8003 under that is 71.95mm.I know the stock bore is 69mm.any help would be great thanks.
Posted: 09:05 pm Feb 20 2012
by Julien D
where is the a7959 stamped?
Posted: 10:01 pm Feb 20 2012
by camarochris
on top of the piston closer to the reeds.
Posted: 06:42 am Feb 21 2012
by Julien D
could be an ART piston, which would indeed be the same as the stock grenade. As far as I know, the only options for a 220 piston were cast OEM variants, (art, pro-x, oem), or Wiseco. So if it's not a wiseco, you should probably replace it.
Posted: 08:09 am Feb 21 2012
by K D
71.95mm, a 240 kit maybe. Does it have a sleeve?
Posted: 08:40 am Feb 21 2012
by Julien D
Ah, missed the oversize. Yes, I suppose it could be a big bore. Wiseco doesn't offer anything larger than 70mm for the 220.
Posted: 08:12 pm Feb 21 2012
by camarochris
i havnt pulled the jug just the head.it does look like it has been sleeved.where can i get an oversized head gasket?im gonna call eric gorrs forward motion he might know who makes this piston.