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Vespa PX125/150/200
PRIMARY-KIT BGM PRO EXTRA LANG
Engines with a lot of torque and early power peak choose the straight-toothed clutches which also require a straight-toothed primary gear (also available as a set with clutch). This allows very long gear reductions to be achieved. Also perfectly suited if the overall gear ratio is too short for very sporty engines with a modified auxiliary shaft and shorter gear steps (e.g. MHR).