What causes Fuel injection throttle body corrosion/blockage on the Triumph Bonneville Se?

Rough idle, hesitation, poor throttle response at low RPM Estimated fix cost: $150-$400

What causes Regulator/rectifier failure causing battery drain on the Triumph Bonneville Se?

Test charging voltage, inspect for melted connector pins Estimated fix cost: $100-$250

Cold start ticking noise that fades when warm Estimated fix cost: $200-$500

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

MODERATE

Rough idle, hesitation, poor throttle response at low RPM

Fix cost: $150-$400

SERIOUS

Test charging voltage, inspect for melted connector pins

Fix cost: $100-$250

MODERATE

Cold start ticking noise that fades when warm

Fix cost: $200-$500

☐Check service history and valve clearance records

☐Test ride cold start for unusual noises

☐Inspect for oil leaks around head gasket

☐Verify charging system with multimeter test

Generally solid, maintenance history matters most