49cc Cylinder Upgrade Kit for 2-stroke midsize bikes

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Specs: This kit converts the 43cc motor into a 49cc motor. If you don't know if your motor is a 43cc or 49cc motor.  The 43cc motor uses the 40mm piston rings, and 49cc motor uses the 44mm piston ring.   The picture below shows the cylinder differences.
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$55 49cc Cylinder Upgrade Kit for midsize bikes $7 $62