*** Mini ATV Performance Parts *** Can-Am, Dinli, Arctic Cat, Bombardier, X-treme, E-Ton, Kasea, Polaris, DRR & more... Phone:  (972) 481-8708 Fax:  (469) 916-8068 Email:  Home ATV Parts About Koso Contact Us Find Dealers - Performance Parts - * New Items * All 4-Stroke Clutch Engine Intake & Carburetor Exhaust Gauges Suspension Wheels & Brakes Accessories - Performance Kits - Motor Kits Suspension Kits - Pictures - Photo Galleries - Dealers - New Dealer Inquiry - Clutch - 4-Stroke KOSO DELTA ADJUSTABLE CLUTCH Fits Can-Am DS70X & DS90X Fully adjustable rpm engagement Increases torque and positive hook up for better holeshot. Bell housing FG107000 is needed with the clutch sold separately FA014004 MSRP $229.95 Click for larger picture and more details... 4-Stroke KOSO POSI GRIP CLUTCH HOUSING Fits Can-Am DS70X & DS90X Clutch housing with a special inner surface for a positive grip when clutch engages. The more horsepower you have the more you need this! FG107000 MSRP $74.95 Click for larger picture and more details... 4-Stroke REAR CLUTCH COMPRESSION SPRING Fits Can-Am DS70X & DS90X High quality compression spring with a special hi-efficiency coating to resist heat build up. 4-Stroke power works best with this 1000 rpm torque spring. FH014101 (1000 rpm) MSRP $16.95 Click for larger picture and more details... 4-Stroke CAN-AM BELT Fits Can-Am DS70X & DS90X Factory replacement belt. 707.5x17.2x28 MSRP $59.00 Click for larger picture and more details... COMPLETE LIGHTENED CLUTCH ASSEMBLY Lightened Hi-Rev Clutch 1500 rpm Shift Springs 1500 rpm Compression Spring Posi-Grip Housing Complete clutch assembly using the finest springs, clutches and housing already assembled at an affordable price. FNA01000 (1500/1500) MSRP $324.95 Click for larger picture and more details... COMPLETE ADJ. CLUTCH ASSEMBLY Adjustable Clutch 1500 rpm Shift Springs 1500 rpm Compression Spring (FNA01001) 2000 rpm Compression Spring (FNA01002) Posi-Grip Housing Complete clutch assembly using the finest springs, clutches and housing already assembled at an affordable price. FNA01001 (1500/1500) MSRP $324.95 FNA01002 (1500/2000) MSRP $324.95 Click for larger picture and more details... CLUTCH POWER UP KIT Install this complete kit for greater top end speed, smoother shifts and better holeshots. This is an absolute must for racing! FN014000 (50cc) MSRP $139.95 FN035000 (90cc) MSRP $139.95 Click for larger picture and more details... FRONT CLUTCH VARIETER Front clutch with different degree belt surface designed for greater top end speed. Made from a tough nickel alloy for exteded life. FB014002 (50cc) MSRP $72.95 FB035002 (90cc) MSRP $72.95 Click for larger picture and more details... REPLACEMENT SLIDERS FK016001 MSRP $14.95 Click for larger picture and more details... CLUTCH X-POWER ROLLERS Hi-performance rollers desinged for racing. FJ401030 (3.00g) MSRP $19.95 FJ401325 (3.25g) MSRP $19.95 FJ401035 (3.50g) MSRP $19.95 FJ401375 (3.75g) MSRP $19.95 FJ401040 (4.00g) MSRP $19.95 FJ401425 (4.25g) MSRP $19.95 FJ401045 (4.50g) MSRP $19.95 FJ401475 (4.75g) MSRP $19.95 FJ401050 (5.00g) MSRP $19.95 FJ401055 (5.50g) MSRP $19.95 FJ401060 (6.00g) MSRP $19.95 FJ401065 (6.50g) MSRP $19.95 FJ401070 (7.00g) MSRP $19.95 FJ401080 (8.00g) MSRP $19.95 Click for larger picture and more details... REAR CLUTCH SHIFT SPRINGS High quality shift springs with a special hi-efficiency coating to resist heat build up. Set of 3 springs (50cc and 90cc) FI014101 (1000 rpm) MSRP $6.95 FI014151 (1500 rpm) MSRP $6.95 FI014201 (2000 rpm) MSRP $6.95 Click for larger picture and more details... REAR CLUTCH COMPRESSION SPRING High quality compression spring with a special hi-efficiency coating to resist heat build up. (50cc and 90cc) FH014101 (1000 rpm) MSRP $16.95 FH014151 (1500 rpm) MSRP $16.95 FH014201 (2000 rpm) MSRP $16.95 FH014204 (2400 rpm) MSRP $16.95 Click for larger picture and more details... CLUTCH SPRING SLIDER State of the art design prevents spring wind up and distortion of the rear clutch compression spring. FM014000 (50cc & 90cc) MSRP $28.95 Click for larger picture and more details... FRONT CLUTCH VARIETER FACE PLATE This face plate with matching degree belt surface should be purchased and installed with the front clutch varieter. FD014001 (50cc) MSRP $39.95 FD035001 (90cc) MSRP $39.95 Click for larger picture and more details... LIGHTENED HI-REV REAR CLUTCH This rear clutch is lighter than a stock unit for quicker revs and has larger pad surfaces for more positive grab and better acceleration. Recommended for motocross and TT racing. FA014001 (50cc & 90cc) MSRP $182.95 Click for larger picture and more details... ADJUSTABLE REAR CLUTCH Adjustable weight postitions for modifying torque delivery. Shift spring location is adjustalbe for different RPM. Recommended for hare scrambles and hill climbing. FA014003 (50cc & 90cc) MSRP $209.95 Click for larger picture and more details... POSI-GRIP REAR CLUTCH HOUSING Clutch housing with a special inner surface for a positive grip when clutch engages. The more horsepower you have the more you need this! FG029002 (50cc & 90cc) MSRP $84.95 Click for larger picture and more details... BELTS - DRR, APEX, DINLI, etc. Two sizes available. 787 x 16 x 30 780 x 16.5 x 30 787x16x30 MSRP $49.95 780x16.5x30 MSRP $49.95 Click for larger picture and more details... Copyright © 2004-2010 Maximum RPM. All rights reserved.