What causes Throttle body balance and idle surging on the Triumph Rocket Iii Classic?

Rough idle, hunting revs, uneven throttle response at low speed Estimated fix cost: $150-$300

What causes Final drive bevel gear oil leaks on the Triumph Rocket Iii Classic?

Oil seepage around rear bevel housing, check ground under bike Estimated fix cost: $200-$500

Weak battery, voltage drop above 14.5V or below 13V at idle Estimated fix cost: $150-$400

Known issues to inspect before buying a used Triumph Rocket Iii Classic. What to check and how much repairs cost.

MODERATE

Rough idle, hunting revs, uneven throttle response at low speed

Fix cost: $150-$300

MODERATE

Oil seepage around rear bevel housing, check ground under bike

Fix cost: $200-$500

SERIOUS

Weak battery, voltage drop above 14.5V or below 13V at idle

Fix cost: $150-$400

☐Check bevel drive housing for oil leaks

☐Test battery and charging voltage output

☐Verify smooth idle with no surging

☐Inspect frame for corrosion near welds

Generally solid, maintenance often neglected by owners