Husqvarna 2010 SMR-450, Workshop Manual

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C.3 Part. N. 8000 H1344 (10-2009)
TROUBLES AND REMEDIES
Trouble Cause Remedy
Clutch noise
1. Discs worn Replace
2. Excesive free play between clutch drum and driving discs Replace
Gearbox noise
1. Gears worn Replace
2. Gear splines worn Replace
Rear transmission chain noise 1. Chain stretched or badly adjusted Replace or adjust
2. Engine sprocket and rear wheel sprocket worn Replace
Clutch slip 1. Clutch springs weak Replace
2. Clutch discs worn Replace
Clutch drag 1. Spring tension uneven Replace
2. Clutch discs bent Replace
Gears not engaging 1. Gearshift forks bent or seized Replace
2. Gearchange pawls worn Replace
3. Gearshift forks’ control pins damaged Replace
Gearchange lever doesn’t
return 1. Selector return spring weak or broken Replace
2. Gearshift forks worn Replace
Slips out of gear 1. Sliding dogs worn Replace
2. Gear splines worn Replace
3. Sliding dog seats on gears worn Replace
4. Splines gearshift forks’ control shaft worn Replace
5. Gearshift forks control pins worn Replace
Engine lacks power 1. Air filter dirty Clean
2. Carburettor main jet blocked or wrong size (TC, TXC) Clean or replace
3. Poor quality fuel Replace
4. Intake manifold loose Tighten
5. Spark plug gap too large Adjust
6. Inadequate compression Find cause
7. Incorrect valve play Adjust
8. Faulty valve guides or seats Replace
9. Valve springs weak or seized Replace
Engine overheating 1. Excessive coke on combustion chamber and/or
piston crown Clean
2. Insufficient engine oil, or wrong oil used Top up or replace
3. Radiator air flow blocked Clean
4. Poor seal at cylinder head gasket Replace
5. Clutch slipping Adjust
6. Faulty cooling fan (TE, SMR) Replace the thermoswitch