What causes AVL engine oil leaks from gaskets on the Royal Enfield Thunderbird 500?

Look under engine for fresh oil seepage or stains Estimated fix cost: $50-$150

What causes Electrical gremlins, switches and wiring corrosion on the Royal Enfield Thunderbird 500?

Test all lights, indicators, horn before buying Estimated fix cost: $80-$200

Ride and shift through all gears repeatedly Estimated fix cost: $30-$100

Cold start behavior, idle smoothness, throttle response Estimated fix cost: $40-$120

Known issues to inspect before buying a used Royal Enfield Thunderbird 500. What to check and how much repairs cost.

MODERATE

Look under engine for fresh oil seepage or stains

Fix cost: $50-$150

MODERATE

Test all lights, indicators, horn before buying

Fix cost: $80-$200

MINOR

Ride and shift through all gears repeatedly

Fix cost: $30-$100

MINOR

Cold start behavior, idle smoothness, throttle response

Fix cost: $40-$120

☐Check service history and oil change frequency

☐Inspect frame and engine for crash damage

☐Verify chain, sprocket, and tire wear condition

☐Cold start the bike before test ride

Decent if maintained, avoid neglected examples