Yamaha 250 4t
Italian specialist Surflex has developed a complete anti-hopping clutch kit upgrade for Yamaha 250 4t cross-enduro that is said to be higher quality and deliver better performance than the OE original it replaces.
Delivered fully assembled with wear resistant and friction reducing coating, it has an inner brake drum made in Ergal that is equipped with an anti-hopping device, trimmed discs, steel discs, springs and Ergal disc pushers.
Developed from their MX, Enduro and Supermotard race experience, the ‘anti-hopping’ device is designed to handle the rapid and aggressive deceleration that occurs when strong braking is required and the effect this can have on the rear wheel, forcing it to ‘hop’, and the grip loss this generates.
The disc pusher moving in the device takes some charge and energy off the springs and creates a temporary clutch sliding, meaning the rider can keep the bike steady, maintain precision steering in a bend and avoid any change in trajectory created by rear wheel ‘hopping’ or vibrations – improving road holding and safety.
The nine trimmed discs which compose the clutch are covered with special materials for off-road competitions. The reduced coefficient of friction is said to result in improved tyre stability and excellent resistance to high temperature and abrasion in the clutch.
The improvement in transmission of engine power to the rear tyre and surface means reduced loss of power and stability. The complete kit is an easy install and comes with variable response springs to cater for different demands.
SURFLEX S.R.L.
www.surflex.it
