BOYESEN RAD VALVE 04 KX250, BLOCK RAD-12I, RAD12I Chain Guides Roll-Off is your option

Roll-Off is your option

*MICHELIN StarCross 5 Medium and MICHELIN StarCross 5 Soft options for 85cc to 150cc and MICHELIN StarCross 5 Mini option for 50cc to 65cc motorcycles

protects and prevents any serious damage to the engine case of your Montesa 4RT if your chain manages to come off or snap

Reduce the load on the swing arm attachment stay by using TPU material that is durable against impact and wear

Each sprocket is CNC machined from aerospace grade 7075-T6 aluminium alloy with a 2-tone anodized/polished finish

BOYESEN RAD VALVE 04 KX250, BLOCK RAD-12I, RAD12I Chain Guides Roll-Off is your optionBoyesen Rad Valve RAD 12I RAD12I Now delivered with carbon fiber reeds for even greater performance gains Maintains flow velocity through the valve and redirects intake charge for more even distribution to the intake ports Sharper, quicker throttle response Added torque improves performance on hills, through corners and over technical jumps Increases horsepower in low , middle and especially the top end ranges One piece aluminum casting, no trimming