What causes Throttle-by-wire glitching or surging at low RPM on the Yamaha Xsr900?

Test slow roll-on throttle response in parking lot Estimated fix cost: $50-$200

What causes Rectifier overheating causing charging failure on the Yamaha Xsr900?

Check battery voltage at idle, inspect rectifier for burn marks Estimated fix cost: $150-$400

Listen for pump prime, check for stalling under load Estimated fix cost: $200-$500

Cold start rattling that disappears after warm-up Estimated fix cost: $80-$300

Known issues to inspect before buying a used Yamaha Xsr900. What to check and how much repairs cost.

MODERATE

Test slow roll-on throttle response in parking lot

Fix cost: $50-$200

SERIOUS

Check battery voltage at idle, inspect rectifier for burn marks

Fix cost: $150-$400

SERIOUS

Listen for pump prime, check for stalling under load

Fix cost: $200-$500

MINOR

Cold start rattling that disappears after warm-up

Fix cost: $80-$300

☐Verify full service history and valve clearance done

☐Check for stator/charging system health via multimeter

☐Inspect frame for crash damage near subframe welds

☐Test ride including highway speeds and low-speed crawl

Generally solid, minor electrical gremlins on high-mileage examples