Cylinder Head - Generic TR 125 Service Manual

11.2 Fault Diagnosis
Low compression pressure
Improperly adjusted valve clearance
Valve burnt or bent
Poorly sealed valve race
Air leakage at cylinder head
Improperly installed spark plug

11.3 Cylinder Head

Removal
Loosen the fastening bolt, and
remove the cylinder head cover
(rocker arm, rocker arm shaft)
Remove the tensioner, loosen the chain
and remove the can shaft.
Noisy cylinder head
Improperly-adjusted valve clearance
Valve spring hurt
Over-high compression pressure
Too much carbon deposited in the combustion chamber
Bolt
Cylinder
head cover
Cam shaft
Tensioner
- 98 -
Chain