Mika Metals Factory Series Chains use exclusive next level bushings that slow elongation of the chain and increase chain life. They have the lowest amount of friction on the market, are extremely lightweight, and are simply the ultimate racing chain. The 420 chain has 130 links. We recommend the use of a master link press to press on the master link as the master link is designed not to have any play in them. 420 chains fit the Cobra 50 (stock), all 65cc bikes, and ONLY the Kawasaki for the 85. Mika Metals Racing chains are made of high quality bushings to reduce friction between plates. They are built to withstand high impact loads in the worst conditions. Their lightweight combined with high tensile strength creates the ultimate racing chain. The 415 Factory Series chain has 120 links. 415 chains fit all KTM 50cc bikes, and modified (must buy 415 sprockets) Cobra 50cc bikes. Mika Metals Factory Series Chains use exclusive next level bushings that slow elongation of the chain and increase chain life. They have the lowest amount of friction on the market, are extremely lightweight, and are simply the ultimate racing chain. The 428 chain has 130 links. We HIGHLY recommend the use of a master link press to press on the master link as the master link is designed not to have any play in it. 428 chains fit all brands of the 85 and super mini EXCEPT the Kawasaki and Honda. Mika Metals Factory Series Chains use exclusive next level bushings that slow elongation of the chain and increase chain life. They have the lowest amount of friction on the market, are extremely lightweight, and are simply the ultimate racing chain. The 520 chain has 118-120 links (it differs per batch) The use of a master link tool press to install the chain is REQUIRED as the master link is designed not to have any play in it.
