Suzuki VZ800 Service Manual page 395

Complaint
Noisy engine
Symptom and possible causes
Excessive valve chatter
1. Too large valve clearance
2. Weakened or broken valve springs
3. Worn tappet or cam surface
4. Worn and burnt camshaft journal
Noise seems to come from piston
1. Worn down pistons or cylinders
2. Fouled with carbon combustion chambers
3. Worn piston pins or piston pin bore
4. Worn piston rings or ring grooves
Noise seems to come from timing chain
1. Stretched chain
2. Worn sprockets
3. Not working tension adjuster
Noise seems to come from clutch
1. Worn splines of countershaft or hub
2. Worn teeth of clutch plates
3. Distorted clutch plates, driven and drive
4. Worn clutch release bearing
5. Weakened clutch dampers
Noise seems to come from crankshaft
1. Due to wear rattling bearings
2. Worn and burnt crank pin bearings
3. Worn and burnt journal bearings
4. Too large thrust clearance
Noise seems to come from transmission
1. Worn or rubbing gears
2. Worn splines
3. Worn or rubbing primary gears
4. Worn bearings
Noise seems to come from water pump
1. Too much play on pump shaft bearing
2. Worn or damaged impeller shaft
3. Worn or damaged mechanical seal
4. Touches pump case and impeller
SERVICING INFORMATION 10-7
Remedy
Adjust.
Replace.
Replace.
Replace.
Replace.
Clean.
Replace.
Replace.
Replace.
Replace.
Repair or replace.
Replace.
Replace.
Replace.
Replace.
Replace the primary
driven gear.
Replace.
Replace.
Replace.
Replace thrust bearing.
Replace.
Replace.
Replace.
Replace.
Replace.
Replace.
Replace.
Replace.