Arctic Cat DVX 400 2008 Service Manual page 144

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Problem: Engine noisy (Noise seems to come from timing chain)
Condition
1. Chain stretched
2. Sprockets worn
3. Tension adjuster malfunctioning
Problem: Engine noisy (Noise seems to come from clutch)
Condition
1. Crankshaft splines - bearings worn
2. Countershaft - hub splines worn
3. Clutch plate teeth worn
4. Driven - drive clutch plates distorted - broken
5. Clutch dampers weak
Problem: Engine noisy (Noise seems to come from crankshaft)
Condition
1. Bearing worn - burned
2. Lower rod-end bearing worn - burned
3. Connecting rod side clearance too large
Problem: Engine noisy (Noise seems to come from transmission)
Condition
1. Gears worn - rubbing
2. Splines worn
3. Primary gears worn - rubbing
4. Bearings worn
5. Bushing worn
Problem: Engine noisy (Noise seems to come from secondary-transmission/left-side cover)
Condition
1. Gears - shaft(s) worn
2. Bearing(s)/bushing(s) damaged
Problem: Clutch slipping
Condition
1. Clutch cable out of adjustment - loss of freeplay
2. Clutch springs weak
3. Pressure disc worn - distorted
4. Clutch plates (driven - drive) distorted
Problem: Clutch dragging
Condition
1. Clutch cable out of adjustment - too much free-play
2. Clutch springs weak
3. Pressure disc - clutch plates distorted
4. Clutch release mechanism worn - damaged
Problem: Transmission will not shift
Condition
1. Gearshift cam broken
2. Gearshift forks distorted
3. Gearshift shaft worn
4. Clutch cable out of adjustment
5. Reverse selector cable adjusted improperly
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Remedy
1. Replace chain
2. Replace sprockets
3. Repair - replace adjuster
Remedy
1. Replace crankshaft - bearings
2. Replace countershaft - hub
3. Replace clutch plate(s)
4. Replace clutch plate(s)
5. Replace dampers
Remedy
1. Replace bearing
2. Replace bearing
3. Replace thrust washer(s)
Remedy
1. Replace gears
2. Replace shaft(s)
3. Replace gears
4. Replace bearings
5. Replace bushing
Remedy
1. Replace gears - shafts
2. Replace bearing(s)/bushing(s)
Remedy
1. Adjust clutch cable
2. Replace springs
3. Replace disc
4. Replace plates
Remedy
1. Adjust cable
2. Replace springs
3. Replace disc - plates
4. Adjust - replace mechanism
Remedy
1. Replace cam
2. Replace forks
3. Replace shaft
4. Adjust cable
5. Adjust cable
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