44mm big-bore kit for '47cc' chinese import pocketbikes with case reed inducted engine. Stock bore on the '47cc' engine is 40mm - meaning with the stock 32mm stroke, the engine size is actually ~40.2cc. This kit will increase your displacement to a much more powerful 48.7cc. Kit includes cylinder, piston, piston rings, 10mm size piston pin, circlips, and cylinder gasket. Increases engine displacement to 48.7cc (44mm bore, 32mm stroke). Increases the power of your engine substantially, allowing you to run higher gearing for more top speed, or keep your current gearing and have faster acceleration.
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