Primary round Pioneer 05, 20, 21, 23 - 9z

The kit includes a 9-tooth primary wheel with a fitted nut.

The 9-tooth primary wheel is intended for off-road racing specials ( TUNING), as this gives you more engine power, it is not a standard gear (it has 14 teeth).

We recommend using an old chain for this primary wheel, which you can shorten by knocking out the links, the new one tends to be quite tight with the new plates and the clutch does not work ideally.

For adjusting the motorcycle to power, this primary gear is a better solution than the secondary gear with a large rosette, since the primary is in oil, it does not suffer like an outdoor gear with mud in the chain.