Offroad 2020

ENGINE body accessories handlebar & grips cables & levers electrical & ignition engine fuel & intake clutch brakes drive steering & suspension bearings tires exhaust chemicals tools & shop 478 MODEL YEARS DESCRIPTION Intake Lift IntakeLobe Center Intake Duration IntakeValve Lash Exhaust Lift Exhaust LobeCenter Exhaust Duration Exhaust ValveLash PART # YAMAHA CONTINUED YZ 426 F 00-02 Camshaft Exhaust Stage 1 exhaust cam:Excellent mid-range increase, improved throttle response, and smoother power delivery compared to OEM:Uses stock valve springs:Dual-cam engine: Intake and exhaust cams sold separately: Includes auto-decompression mechanism ----- ----- ----- ----- 8.76 105 259 0.2 870351 201.95 YZ 426 F 00-02 Camshaft Intake Stage 1 intake cam:Excellent mid-range increase, improved throttle response, and smoother power delivery than OEM.Uses stock valve springs:Dual-cam engine: Intake and exhaust cams sold separately 8.8 105 260 0.15 ----- ----- ----- ----- 870350 181.75 WR 450 F 03-15 Camshaft Exhaust Stage 2 exhaust cam:Excellent top-end power increase with some bottom end loss:Uses stock valve springs:Dual-cam engine: Intake and exhaust cams sold separately: Includes auto-decompression mechanism ----- ----- ----- ----- 8.67 103 265 0.2 870354 201.95 WR 450 F 03-15 Camshaft Intake Stage 2 exhaust cam:Excellent top-end power increase with some bottom end loss:Uses stock valve springs:Dual-cam engine: Intake and exhaust cams sold separately 8.86 110 269 0.15 ----- ----- ----- ----- 870353 201.95 WR 450 F 16-18 Camshaft Exhaust Stage 1 exhaust cam:Good low to mid range gains up to 9200 RPM with minor loss to redline:Designed with ImprovedThrottle Response (I.T.R.) technology:Uses stock valve springs:Dual-cam engine: Intake and exhaust cams sold separately:Supplied with decompression mechanism ----- ----- ----- ----- 9.576 101.58 205.2 0.185 833921 222.15 WR 450 F 16-18 Camshaft Exhaust Stage 2 exhaust cam:Slight bottom end gain to 4800 RPM and good gains from 6500 RPM to redline:Designed with ImprovedThrottle Response (I.T.R.) technology:Uses stock valve springs:Dual-cam engine: Intake and exhaust cams sold separately:Supplied with decompression mechanism ----- ----- ----- ----- 10.16 106.45 260.39 0.185 833923 222.15 WR 450 F 16-18 Camshaft Intake Stage 1 intake cam:Good low to mid range gains up to 9200 RPM with minor loss to redline:Uses stock valve springs:Dual-cam engine: Intake and exhaust cams sold separately 10.414 99.17 248.39 0.135 ----- ----- ----- ----- 833920 222.15 WR 450 F 16-18 Camshaft Intake Stage 2 intake cam:Slight bottom end gain to 4800 RPM and good gains from 6500 RPM to redline:Uses stock valve springs:Dual-cam engine: Intake and exhaust cams sold separately 10.795 106.48 262.55 0.135 ----- ----- ----- ----- 833922 222.15 YZ 450 F 03-09 Camshaft Exhaust Stage 2 exhaust cam:Excellent top-end power increase with some bottom end loss:Uses stock valve springs:Dual-cam engine: Intake and exhaust cams sold separately:Exhaust cam includes auto-decompression mechanism ----- ----- ----- ----- 8.67 103 265 0.2 870356 201.95 YZ 450 F 03-09 Camshaft Exhaust Stage 2 exhaust cam:Excellent top-end increase with no bottom end loss: Uses stock valve springs:Dual-cam engine: Intake and exhaust cams sold separately:Supplied with decompression mechanism ----- ----- ----- ----- 8.69 97.25 254 0.2 870358 201.95 YZ 450 F 03-09 Camshaft Intake Stage 2 exhaust cam:Excellent top-end power increase with some bottom end loss:Uses stock valve springs:Dual-cam engine: Intake and exhaust cams sold separately 8.86 110 269 0.15 ----- ----- ----- ----- 870353 201.95 YZ 450 F 03-09 Camshaft Intake Stage 2 intake cam:Excellent top-end increase with no bottom end loss: Uses stock valve springs:Dual-cam engine: Intake and exhaust cams sold separately 8.89 108 260 0.15 ----- ----- ----- ----- 870357 201.95 YZ 450 F 10-13 Camshaft Exhaust Stage 1 exhaust cam: Increased power up to 9000 RPM and no loss on the top-end: Improved throttle response:Uses stock valve springs:Dual-cam engine: Intake and exhaust cams sold separately:Supplied with decompres- sion mechanism ----- ----- ----- ----- 8.64 101.5 249 0.225 870360 201.95 YZ 450 F 10-13 Camshaft Exhaust Stage 2 exhaust cam: Improved power from 6000 RPM to rev limiter with a slight loss at lower RPM:Uses stock valve springs:Dual-cam engine: Intake and exhaust cams sold separately:Supplied with decompression mechanism ----- ----- ----- ----- 8.89 102 254 0.225 870362 201.95 YZ 450 F 10-13 Camshaft Intake Stage 2 intake cam: Improved power from 6000 RPM to rev limiter with a slight loss at lower RPM:Uses stock valve springs:Dual-cam engine: Intake and exhaust cams sold separately 9.78 104.5 265 0.1 ----- ----- ----- ----- 870361 201.95 YZ 450 F 10-13 Camshaft Intake Builder series intake cam:Provides the lowest RPM torque.When used with the #4170-EXBLD, the set makes a great torque set up good for Supercross and other riding situations which require good throttle response and increased partial throttle torque.Dual-cam engine: Intake and exhaust cams sold separately 8.9 106.5 249 0.1 ----- ----- ----- ----- 870363 295.95 YZ 450 F 10-13 Camshaft Intake Stage 1 intake cam: Increased power up to 9000 RPM with no loss on the top-end: Improved throttle response:Uses stock valve springs:Dual-cam engine: Intake and exhaust cams sold separately 9.4 106 250 0.1 ----- ----- ----- ----- 870359 201.95 YZ 450 F 14-15 Camshaft Exhaust Stage 1 exhaust cam:Excellent low to mid-range increase:Designed with ImprovedThrottle Response (I.T.R.) technology:Uses stock valve springs: Dual-cam engine: Intake and exhaust cams sold separately:Supplied with decompression mechanism ----- ----- ----- ----- 9.14 101.7 249.4 0.22 871657 100.95 YZ 450 F 14-15 Camshaft Exhaust Stage 2 exhaust cam:Excellent midrange to top end increase:Designed with ImprovedThrottle Response (I.T.R.) technology:Uses stock valve springs:Dual-cam engine: Intake and exhaust cams sold separately:Sup- plied with decompression mechanism ----- ----- ----- ----- 9.14 101.7 249.4 0.22 871659 222.15 YZ 450 F 14-15 Camshaft Intake Stage 1 intake cam:Excellent low to mid-range increase:Designed with ImprovedThrottle Response (I.T.R.) technology:Uses stock valve springs: Dual-cam engine: Intake and exhaust cams sold separately 9.73 104 251.8 0.16 ----- ----- ----- ----- 871656 201.95 YZ 450 F 14-15 Camshaft Intake Stage 2 intake cam:Excellent midrange to top end increase:Designed with ImprovedThrottle Response (I.T.R.) technology:Uses stock valve springs: Dual-cam engine: Intake and exhaust cams sold separately 10.03 114 269.3 0.16 ----- ----- ----- ----- 871658 201.95 HOT CAMS DIRTBIKE CAMSHAFTS CONTINUED