Yamaha Rdx 135 Common Problems
Known issues to inspect before buying a used Yamaha Rdx 135. What to check and how much repairs cost.
Worn or seized piston rings
SERIOUSBlue smoke on startup, low compression test reading
Fix cost: $80-$150
Clogged or damaged carburetor
MODERATEHard starting, rough idle, poor throttle response
Fix cost: $20-$60
Crankshaft bearing wear
SERIOUSKnocking noise, vibration at high RPM
Fix cost: $120-$250
Rust in fuel tank and lines
MODERATEFuel discoloration, engine sputtering under load
Fix cost: $30-$80
Pre-Purchase Checklist
☐Run engine cold to check startup smoke
☐Check for frame cracks near engine mounts
☐Inspect exhaust port for carbon buildup
☐Test ride above 7000 RPM powerband
Decent if maintained, punishing if neglected