Gearbox drum top performance lightened reinforced alloy minarelli am6

The Top Performances gearbox drum is reserved for those who really want an engine pushed and refined to the maximum, it is lightened and weighs about half the weight of the original one, which is not negligible given the weight of the latter, it brings a faster and more frank shifting with fewer misfires. However alloy certainly reinforced but all the same more fragile than the origin out of steel, to thus take precaution with the assembly not to mistreat it.

Tip: in case you have damaged the 2 cones of the lighter drum, you just have to take it to a turner who will fit you with stainless steel inserts by machining it at the front, thanks to these you can machine the drum location crankcases in order to install needle bearings of the diameter of the 2 cones, the gear change will be even more reliable, fast and precise, this technique is widely used in competition . Do not install a needle bearing if the cones of the drum are not replaced by stainless steel inserts because this will cause the opposite effect (seizing) since the alloy is much softer than the needles of the cage.