thanks for the info, its a 50cc and i think i found a cast iron block and piston +rings for 75$ but not to sure yet, copy and past this link to browser http://scooter-center.com/catalog/product_info.php?products_id=350&cPath=4_26_278_2325&PHPSESSID=f4c2abe91d18b748258d8c5b02a4f691
all advice...