Scooterotica

any one know if i can fit a differant piston i,e honda yamaha to rapido needs to be 71mm as barrel siezed and needs rebore
thanks

yes you can fit different pistons but it all depends on your crank / conrod.

dont know what crank it is but rod is standard gp 108 if that helps

Twinny wrote:any one know if i can fit a differant piston i,e honda yamaha to rapido needs to be 71mm as barrel siezed and needs rebore
thanks

think will do best? because you have decided in this election?
Regards

think will do best? because you have decided in this election?
Regards[/quote]
is it Parker?

last 2 posts totally lost me ????????? have i asked a silly question or is there just muppets on here

Twinny wrote:last 2 posts totally lost me ????????? have i asked a silly question or is there just muppets on here

Nothing wrong with your question Twinny, e_9111 is Spanish and his english is a little limited. Parker is a charater who posts mostly on the LCGB but despite being British is almost as hard to follow......very entertaining though

I don't know much about crank and piston combinations but from what I've read, most Jap pistons have a different size gudgeon pin and require a Jap con rod with a corresponding small end. Also, some Jap pistons have the gudgeon pin closer to or further away from the top of the piston which then requires a different length of rod. Then you get into the position of the ring pegs which can foul the exhaust port and require the ring pegs to be moved. All a lot of hasle for not very much saving imho. Your rod will be 107mm if it's a standard 58mm crank BTW Hopefully someone with more definate knowledge will chip in and correct any errors in the above

mb do 71mm pistons there about £140. Lambretta restore also do 71mm there about £65 ive got one on my 240

thanks coaster and carlos thought i was going mad for a while there

got my 71mm of af rayspeed