Troubleshooting - Honda CRF450R 2009 Service Manual

CRANKCASE/CRANKSHAFTITRANSMISSION/BALANCER
TROUBLESHOOTING
Excessive noise
Worn crankshaft bearings
Worn or damaged connecting rod big end bearing
Worn connecting rod small end (page 10-8)
Worn balancer shaft bearings
Improper balancer installation
Worn, seized or chipped transmission gear
Worn or damaged transmission bearing
Incorrect valve adjustment (page 4-14)
Slicking valve or broken valve spring (page 9-22)
Worn or damaged camshaft (page 9-12)
Worn or damaged valve lifter (page 9-22)
Worn or loose cam chain
Worn or damaged cam chain tensioner (page 9-19)
Worn cam sprocket teeth (page 9-12)
Faulty cylinder, piston or piston rings (page 10-6)
Transmission Jumps out of gear
Worn gear dogs
Worn gear shifter groove
Benl shift fork shaft
Broken gearshift drum stopper arm (page 11-25)
Broken gearshift drum stopper arm spring (page 11-25)
loose gearshift drum stopper arm bolt (page 11-25)
Worn or bent shift forks
Weak or broken gearshift spindle return spring
Hard to shift
Improper dutch lever freeptay adjustment (page 4-30)
Incorrect transmission oil viscosity (page 4-19)
Bent shift fork
Bent shift fork shaft
Bent shift fork claw
Damaged gearshift drum guide grooves
Damaged gearshift spindle (page 11-26)
Damaged gearshift drum stopper arm and pin (page 11-25)
loose gearshift drum stopper arm bolt (page 11-25)
Bent shift spindle
Engine v ibration
Excessive crankshaft runoul
• Improper balancer timing
13·6