Quad transfer ports

The GXH50 clones can rev pretty high 7-8k and keep in mind it's a 49cc 4 stroke its a high rpm engine. Most 4 stroke clones and such are governed at 3,600 but 2 stroke bike engines have no gov and have only 1 gear so they have to rev high to achieve top speed but with a multiple speed you have to drop the rpms for a sec while you switch gears.
 
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