KRT1 Belt Drive conversions have been successfully tried and tested since 1998. 

Over 1,100 kits have been sold throughout the world, including in the UK, USA, Sweden, Australia, Belgium, Germany, France, Denmark, Norway, Holland and Japan. 10% of these kits were race kits.

Front and rear pulleys are CNC machined from solid HE 30 alloy and hard anodised black to B.S. 5599 for long life. The  belts and the Yamaha R1 kevlar plates can be run wet in oil, or dry as required. The kits are very low maintenance; once correctly set no adjustment is required for a belt.

Standard Venom ratio 1.9:1 is retained by using a 31 tooth front pulley and 59 tooth rear pulley. The belt is a polyurethane / steel AT10 Synchroflex belt with a large 10mm pitch.

The 20mm wide belt fits neatly inside the original ‘band’ or ‘screw’ type Velocette chain-case.

The road kit also employs the original Velocette shock absorber. A replacement M89/8 pulley to replace the sprocket half of the cush drive can be obtained.  

An oil seal and holder is bonded to the outside of the drive side crank-case. Using a solid-setting RTV sealant (ThreeBond 1207B ). A major advantage of this kit is that ‘oil wash’ through the bearing is stopped, so your primary chain case should stop filling up with oil from the engine.