GAS GAS 125 TXT GP 2019, Owner'S Manual

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Owner's Manual
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Troubleshooting
FAULT CAUSE SOLUTION
6 Engine makes strange noises - Ignition problem.
- Overheating. - Go to a specialized workshop.
- See section 5.
7 Exhaust backfires - Presence of carbon in combustion
chamber.
- Poor quality petrol or wrong octane
rating.
- Spark plug in poor condition or with
wrong specifications.
- Damaged exhaust system gaskets
- Clean combustion chamber.
- Drain petrol and add new with higher octane rating.
- Replace spark plug with new or more appropriate one.
- Check if exhaust system damaged. Gaskets must be in
perfect condition, if not, change them for new ones.
8 Exhaust emits white smoke - Damaged cylinder head O-ring. (Water
leaks into cylinder).
- Incorrectly adjusted throttle valve
cable.
- Replace O-ring on cylinder head cover.
- Go to a specialized workshop.
- Adjust throttle valve cable.
9 Exhaust emits brown smoke - Clogged air filter.
- Main jet too high.
- Clean or change air filter. - Go to a specialized workshop.
- Check main jet. Go to a specialized workshop.
10 Gears do not engage - Clutch does not detach.
- Bent or seized shift fork
- Seized gear in transmission.
- Damaged gear shift lever.
- Broken or loose selector position
spring.
- Broken selector reverse mechanism
spring.
- Broken shift drum.
- Broken gear selector ratchet spring
- Contact specialist garage.
- Change shift fork.
- Go to a specialized workshop.
- Replace gear shift lever.
- Adjust selector position spring or change.
- Replace selector reverse mechanism spring.
- Change shift drum.
- Replace selector ratchet spring.
11 Gears jump - Worn shift fork in gears.
- Worn gear groove.
- Damaged gear lugs.
- Worn drum shift groove.
- Worn shift fork axle.
- Broken selector drum position spring.
- Broken gears.
- Change shift fork.
- Change. - Go to a specialized workshop.
- Change. - Go to a specialized workshop.
- Change. - Go to a specialized workshop.
- Change axle. - Go to a specialized workshop.
- Change spring. - Go to a specialized workshop.
- Contact specialist garage.
12 Clutch slips - No play on clutch lever
- Worn clutch plate.
- Worn clutch hub.
- Broken or weak clutch spring.
- Worn clutch discs.
- Contact specialist garage.
- Replace clutch plate. - Go to a specialized workshop.
- Change clutch hub.
- Adjust or change clutch spring.
- Change clutch discs. Go to a specialized workshop.