What causes Carburetor clogging and rough idling on the Yamaha Lc135?

Start cold, listen for rough idle or stalling Estimated fix cost: $20-$50

What causes Worn rear sprocket and chain stretch on the Yamaha Lc135?

Inspect chain slack, sprocket teeth for shark-fin shape Estimated fix cost: $40-$80

Look for oil residue around engine top and fins Estimated fix cost: $60-$120

Accelerate hard in 3rd gear, feel for RPM spike Estimated fix cost: $50-$100

Known issues to inspect before buying a used Yamaha Lc135. What to check and how much repairs cost.

MODERATE

Start cold, listen for rough idle or stalling

Fix cost: $20-$50

MODERATE

Inspect chain slack, sprocket teeth for shark-fin shape

Fix cost: $40-$80

SERIOUS

Look for oil residue around engine top and fins

Fix cost: $60-$120

MODERATE

Accelerate hard in 3rd gear, feel for RPM spike

Fix cost: $50-$100

☐Check service history and mileage records

☐Test all gears for smooth engagement

☐Inspect frame for cracks or crash damage

☐Verify engine number matches documents

Very reliable if serviced regularly and not abused