MOPED ARMY

maybe they gave you an oversized piston?

no.. sorry if my writing is confusing. i'm trying to put the new piston in the new cylinder.

i was just testing to see what normal tightness is by pushing the old piston through the old cylinder.

ps. tad faded.

idk. they make a couple oversized sizes. theyre for cylinders that have been seized and rebored to a slightly larger size. usually a few thousands of an inch larger.

i ordered one from treats to but mine seems to fit good. what carb and pipe are you planning on running? also what airfilter?

i have a 15mm bing carb with the 82 jet, a treats air filter intake, and an exhaust i picked up at 1977 mopeds at lunchtime one day that's not a biturbo.. i also put on a 15 spoke sprocket.

i'm hoping the metrakit will be the final piece of my puzzle of my quest to get to Chabot Science Center from my pad in East Oakland on my maxi.

assumed BFH is a common term on any forum where there's an engine involved. :)

mine's like the one on the right and it says 43,450 on it..

i could take it to a machine shop i use for my cars to get it to work, but it's cheaper overall to just get a new one i'm sure..

it's ok if you scratched it a bit, it will hone out, metrakits are cool that way, they are iron bore, not nikasil or chrome walled aluminum like most others, so you can hone it and bore it all you want if the walls get damaged. you just need the right size piston and run a brake hone in there with some oil. I think it must have come with the wrong/mismatched piston, email treats, he will take care of it i'm sure.

BFH = Big Fucking Hammer

nope.. the piston came in a separate plastic bag.

did you make sure the ring land (little pin in the ring groove) is lined up?

i think that is too big of a piston by .05mm

My 65cc Metrakit is right here on my desk...the piston slides through no problems...rings also seem to fit into the piston perfectly.

I'd say wrong piston dooder!

cool.. thanks for info guys. at this point, i need more then the piston because i damaged the cylinder case in the process of putting pressure on it tying to get the piton in place.

contacted treats this morning. they've been righteous with me so far, so i'm sure it'll all work out.

ps. this forum rules. danke.

k, will do when i get home.. i didn't use a hammer, but i did use a rubber mallet and a rag to gently tap it in place. gave up when it stopped budging. pretty much jammed the piston in the cylinder. after pulling the cylinder case off, i had to tap the piston out of the cylinder since it was pretty much wedged in.

oh well, sometimes you learn best from your mistakes. time to order up a new one.