Looking For BBK kit  By  burnrubber (Read 858 times)

i am assuming it is a minarelli clone horizontal engine, malossi has some good kits that are cast iron something like this www.racingplanetusa.com/cylinder-malossi-sport-70cc-12mm-piston-generic-keeway-p-2324-1.html?cPath=802_24970_24980&sessID=e13a2ebb06bf4835d0c6a9c28fab0895 this one has a 12mm wrist pin don't know if yours is 12mm or 10mm

that is the horizontal engine scrappydog has complete engine it is 90cc engine, but is the short case not sure which one you have it is on bottom of the page www.scrappydogscooters.com/50cc_2stroke_Performance.html there are not many engines out there that i have seen, the kits are pretty easy to install, i think it would be easier than changing the whole engine took me around 40 minutes to remove old cylinder and install the new one, not sure about yours, but on mine you don't have to take the engine off to install the cylinder kit

[replyingto=pgs]pgs[/replyingto]Now to get a cast iron piston? Scrappy does have a good kit though, for the price.Dont want an aluminum piston though. Going to do it right this time.

ALL pistons are aluminum it is the cylinder than can be iron or aluminum . Iron is cheaper and more forgiving in a soft seize

I use this BBK and it runs strong shop.jupiterscooters.net/Cylinder-kit-75cc-Minarelli-10mm-wrist-pin-Made-in-Taiwan-MGMP0108-75CC-10mmpin.htm

Make sure to double check the wristpin clips as I and another member had one come out and it ate up the engine . I put in one with the piston in my hand since limited clearance , as I removed the body and fan shrouds instead of dropping the entire engine assembly .

Mesure your wristpins as they come in 10mm an 12mm but you may have a 10mm as I do .

Wiseco is a high end company that machines parts out of billet instead of casting , which means it is stronger and they forged it once on some and twice on higher priced pistons . I used a WiseCo in my Honda CR125 and it ran like a beast with it being not only forged , but lighter , larger ports ( racing model ) and had a shorter skirt .

It took me 40 mins to remove the pipe , main body as a single piece , fan shroud and the engine is so easy with only for nuts to remove and with angled sanp ring pliers the wristpins . I went to Oreillys and bought a compression ring plier as when I first rebuild a moped 30 years ago I broke the rings when I tried to install by hand . Make sure to use plenty of 2T oil or engine assembly grease instead of installing dry . Once you get the second ring started into the cylinder you may need a rubber mallet to tap it on down as I did . I put one the exhaust and did a test fire , let it idle and gave it a lil rev up and shut it down and retorqued the head nuts before putting the shroud and body back on