Excessive Noise Level; Excessive Fumes - APRILIA QUASAR 125 2003 Workshop Manual

TROUBLESHOOTING
7.4

EXCESSIVE NOISE LEVEL

Excessive noise level
7.5

EXCESSIVE FUMES

Excessive fumes
7
- 6 -
00
Possible causes
- Worn valve adjustment
- Jammed valve or broken valve spring
- Damaged rocker arms or shaft or camshaft
- Damaged or worn chain
- Damaged or worn chain tensioner
- Worn camshaft sprocket teeth
Possible causes
- Worn cylinder, piston or piston rings
- Wrong piston ring assembly
- Scores or scratches on piston or on cylinder walls
- Damaged valve stem seal
QUASAR 125-180
Release 00/2003 - 09