What causes Fuel injector clogging or carburetor issues on the Sym Maxsym 400?

Rough idle, hesitation, poor throttle response at low RPM Estimated fix cost: $80-$200

What causes Rear shock absorber wear and leaking on the Sym Maxsym 400?

Bounce test, oil streaks on shock body, soft handling Estimated fix cost: $150-$350

Check voltage at idle and rev, battery dying quickly Estimated fix cost: $200-$450

Cold start metallic rattling disappearing after warm-up Estimated fix cost: $100-$250

Known issues to inspect before buying a used Sym Maxsym 400. What to check and how much repairs cost.

MODERATE

Rough idle, hesitation, poor throttle response at low RPM

Fix cost: $80-$200

MODERATE

Bounce test, oil streaks on shock body, soft handling

Fix cost: $150-$350

SERIOUS

Check voltage at idle and rev, battery dying quickly

Fix cost: $200-$450

MODERATE

Cold start metallic rattling disappearing after warm-up

Fix cost: $100-$250

☐Check service history and oil change records

☐Test ride cold start for unusual noises

☐Inspect frame and subframe for crash damage

☐Verify charging voltage with multimeter test

Decent budget scooter, maintain regularly, avoid neglected examples