What causes Engine vibration at high RPM on the Royal Enfield Thunderbird 350?

Check engine mounts, rubber bushings, and handlebar grips Estimated fix cost: $20-$80

What causes Oil leaks from engine gaskets on the Royal Enfield Thunderbird 350?

Inspect rocker cover, primary cover, and base gaskets Estimated fix cost: $50-$150

Test horn, lights, starter; inspect wiring harness condition Estimated fix cost: $60-$200

Test all gears while riding, check clutch adjustment Estimated fix cost: $30-$120

Known issues to inspect before buying a used Royal Enfield Thunderbird 350. What to check and how much repairs cost.

MODERATE

Check engine mounts, rubber bushings, and handlebar grips

Fix cost: $20-$80

MODERATE

Inspect rocker cover, primary cover, and base gaskets

Fix cost: $50-$150

SERIOUS

Test horn, lights, starter; inspect wiring harness condition

Fix cost: $60-$200

MODERATE

Test all gears while riding, check clutch adjustment

Fix cost: $30-$120

☐Check service history and oil change records

☐Look for rust on chrome and exhaust pipes

☐Start cold engine, listen for knocking sounds

☐Inspect chain, sprocket, and brake pad wear

Decent if maintained, avoid neglected examples