I am having a 'if I am going to go thru ebay for a 80cc 2 stroke kit?' I could get an original china original at $165 or a *** nock off for $240 take home price. Some minor upgrades can also be found for both. The made in [email protected]¶°#€©£ has roller bearings on the crank. What should I do if longevity is an issue? Please do not mention 4 letter words! The icing might be where can a 9 hole 48t sprocket be be found?