This is a 4-stroke mini vehicle big bore kit installation manual for beginners. ●There are two sections: the upper waist section that describes the work from the cylinder head to the piston section, and the lower waist section that describes the work from the crankcase to the clutch, transmission and crankshaft.The lower back section is suitable for a wide range of vehicles, from vehicles with cells to vehicles with centrifugal clutches. ●You can study the engine structure as if it were a plastic model because it is all illustrated. ●The illustrations are faithful to each point and detail. ●
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