9. DRIVE AND DRIVEN PULLEYS Mongoose/KXR 90/50 SERVICE INFORMATION GENERAL INSTRUCTIONS · The drive pulley, clutch and driven pulley can be serviced with the engine installed in the frame. · Avoid getting grease and oil on the drive belt and pulley faces. Remove any oil or grease from them to minimize the slipping of drive belt and drive pulley. SPECIFICATIONS (Mongoose/KXR 90) Item Standard (mm) Service Limit (mm) Movable drive face bushing I.D. 23.98924.052 24.06 Drive face collar O.D. 23.9623.974 23.94 Drive belt width 17.5 16.5 Clutch lining thickness 4.5 2.0 Clutch outer I.D. 112.0112.2 112.5 Driven face spring free length 145.5 137.5 Driven face O.D. 33.96533.985 33.94 Movable driven face I.D. 34.00034.025 34.06 Weight roller O.D. 15.9216.08 15.4 SPECIFICATIONS (Mongoose/KXR 50) Item Standard (mm) Service Limit (mm) Movable drive face bushing 20.03620.085 20.6 Drive face collar O.D. 20.0120.025 19.98 Drive belt width 18 17.5 Clutch lining thickness 3.5 1.0 Clutch outer I.D. 107107.2 107.5 Driven face spring free length 98.1 92.8 Driven face O.D. 33.96533.985 33.94 Movable driven face I.D. 34.034.025 34.06 Weight roller O.D. 15.9216.08 15.4 9-2