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| Description | Part number | Qty |
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Gear box is a set of pieces that allows you to vary your speed according to the engine speed. It is located into the crankcase. This set turns into the crankcase on bearings with oil.
The mainshaft is driven by the clutch and the countershaft is driven by the mainshaft. Change of gear on a pitbike is done by moving laterally driven forks quide gear they even on the drum's selection. It operates in rotation by the gear shift lever.