What causes Charging system/stator failure on the Triumph Bonneville Speedmaster?

Battery voltage at idle, check for dimming lights Estimated fix cost: $200-$500

What causes Fuel injection throttle body sync issues on the Triumph Bonneville Speedmaster?

Rough idle, hesitation, uneven throttle response Estimated fix cost: $100-$200

Rattling on cold start, listen carefully at startup Estimated fix cost: $300-$600

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

SERIOUS

Battery voltage at idle, check for dimming lights

Fix cost: $200-$500

MODERATE

Rough idle, hesitation, uneven throttle response

Fix cost: $100-$200

SERIOUS

Rattling on cold start, listen carefully at startup

Fix cost: $300-$600

☐Check service history for cam chain maintenance

☐Test ride to feel for fueling hesitation

☐Inspect for oil leaks around head gasket

☐Load test battery and check charging voltage

Solid bike, maintain regularly to avoid costly repairs