What causes Reed valves worn or cracked on the Yamaha Rd 350?

Listen for rattling, check throttle response and power loss Estimated fix cost: $40-$120

What causes Power valve (YPVS) seized or stuck on the Yamaha Rd 350?

Rev to 6500rpm, feel for powerband engagement Estimated fix cost: $80-$200

Uneven idle, oily residue near engine cases Estimated fix cost: $150-$350

Check for rough idle, hesitation, and fuel leaks Estimated fix cost: $50-$150

Known issues to inspect before buying a used Yamaha Rd 350. What to check and how much repairs cost.

SERIOUS

Listen for rattling, check throttle response and power loss

Fix cost: $40-$120

SERIOUS

Rev to 6500rpm, feel for powerband engagement

Fix cost: $80-$200

MODERATE

Uneven idle, oily residue near engine cases

Fix cost: $150-$350

MODERATE

Check for rough idle, hesitation, and fuel leaks

Fix cost: $50-$150

☐Cold start test, should fire easily

☐Check expansion chambers for dents or rust

☐Verify both cylinders fire evenly

☐Inspect frame for cracks near steering head

Capable bike, requires regular two-stroke maintenance