What causes Throttle body sync causes rough idle/stalling on the Triumph Trident 660?

Idle quality when cold, hesitation at low RPM Estimated fix cost: $100-$200

What causes Clutch basket rattle at low RPM on the Triumph Trident 660?

Listen for metallic rattle at idle in neutral Estimated fix cost: $300-$600

Inspect below water pump for residue or staining Estimated fix cost: $150-$350

Check for pending recalls, verify dealer flashed ECU Estimated fix cost: $0-$100

Known issues to inspect before buying a used Triumph Trident 660. What to check and how much repairs cost.

MODERATE

Idle quality when cold, hesitation at low RPM

Fix cost: $100-$200

MINOR

Listen for metallic rattle at idle in neutral

Fix cost: $300-$600

MODERATE

Inspect below water pump for residue or staining

Fix cost: $150-$350

MINOR

Check for pending recalls, verify dealer flashed ECU

Fix cost: $0-$100

☐Confirm service history includes valve checks

☐Test ride above 5000 RPM for smoothness

☐Check for coolant loss or overheating history

☐Verify no active Triumph recalls outstanding

Generally solid, minor issues easily managed