The Eco Version of the Naraku transmission set includes: clutch, clutch bell and variator. All parts match one another. All restrictions are negated. Top speed and drivability on hills is improved. Kit contains variator, variator sleeves, weights, clutch and clutch bell. Suitable for all 4-strokes with 139QMB engine. Kit for scooters in untuned condition. Where changes are made to exhaust or cylinder, the variator must also be adapted and, where necessary, a stronger counter pressure spring fitted.