What causes Throttle body balance issues causing rough idle on the Triumph Thunderbird Storm?

Listen for uneven idle, feel for vibration at standstill Estimated fix cost: $150-$300

What causes Coolant leak from water pump seals on the Triumph Thunderbird Storm?

Inspect below engine for residue, check coolant level Estimated fix cost: $300-$600

Test battery voltage at idle, check for warning lights Estimated fix cost: $400-$800

Inspect belt for cracks, check tension and alignment Estimated fix cost: $200-$450

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

MODERATE

Listen for uneven idle, feel for vibration at standstill

Fix cost: $150-$300

SERIOUS

Inspect below engine for residue, check coolant level

Fix cost: $300-$600

SERIOUS

Test battery voltage at idle, check for warning lights

Fix cost: $400-$800

MODERATE

Inspect belt for cracks, check tension and alignment

Fix cost: $200-$450

☐Cold start the engine before test ride

☐Check service history for coolant and belt maintenance

☐Test ride above 60mph for charging system load

☐Inspect frame and swingarm for crash damage signs

Decent cruiser, maintenance-sensitive, avoid neglected examples