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Honda CRF450RL 2021 Owner's Manual & Off-Road Handbook page 27

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SERVICE INFORMATION ·····························2-2
MAINTENANCE SCHEDULE - OFF-ROAD
USE································································2-8
MAINTENANCE SCHEDULE - ON-ROAD
USE································································2-9
FUEL LINE···················································2-10
FUEL FILTER ··············································2-13
THROTTLE OPERATION····························2-18
AIR CLEANER·············································2-18
CRANKCASE BREATHER ·························2-20
SPARK PLUG··············································2-23
VALVE CLEARANCE··································2-24
ENGINE OIL ················································2-32
ENGINE OIL FILTER···································2-34
DECOMPRESSOR SYSTEM ······················2-34
ENGINE IDLE SPEED ·································2-35
PISTON/PISTON RINGS/PISTON PIN········2-35
RADIATOR COOLANT ·······························2-44
COOLING SYSTEM·····································2-46
DRIVE CHAIN··············································2-47
2. Maintenance
DRIVE CHAIN SLIDER ······························· 2-50
DRIVE CHAIN ROLLER······························ 2-51
DRIVE/DRIVEN SPROCKET ······················ 2-51
BRAKE FLUID ············································ 2-52
BRAKE PADS WEAR ································· 2-53
BRAKE SYSTEM ········································ 2-54
BRAKE LIGHT SWITCH ····························· 2-55
HEADLIGHT AIM ········································ 2-55
CLUTCH SYSTEM ······································ 2-55
CONTROL CABLES ··································· 2-60
SIDESTAND ················································ 2-62
SUSPENSION ············································· 2-62
SWINGARM/CUSHION LINKAGE·············· 2-63
FORK OIL···················································· 2-63
SPARK ARRESTER ··································· 2-81
NUTS, BOLTS, FASTENERS ····················· 2-82
WHEELS/TIRES ·········································· 2-82
STEERING HEAD BEARINGS ··················· 2-82
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