If you ride in dusty, sandy or muddy conditions you may have primary belt slippage and you will eventually fail the stock primary belt possibly leaving you stranded in the middle of nowhere. Don’t let this happen! Install a db Primary chain drive system. This primary chain drive kit is much stronger, and a necessary upgrade for the serious off-road rider. Maintains stock gear ratio. Non o-ring chain with master link can be replaced easily.
Works 420 & 428 Motocross / off road racingchain • Deep gold side plates & gold inner plates. Super strong & lightweight design for high performance / racing mini off road & motocross machines. Utilizes TST (TripleStar Treated) ultra hard pins & 100% heat treated components for high strength & durability.