What causes Worn piston, rings, top end from derestriction on the Aprilia SX 50?

Compression, smoke, rattle, rebuild receipts, seller honesty Estimated fix cost: $250-$600

What causes D50B0 gearbox selector and bearing failures on the Aprilia SX 50?

Test all six gears, listen for whine, jumping Estimated fix cost: $400-$900

Coolant level, weep hole drips, oily coolant residue Estimated fix cost: $80-$250

Cold start, lights, dash, connectors under fairings Estimated fix cost: $100-$300

Known issues to inspect before buying a used Aprilia SX 50. What to check and how much repairs cost.

SERIOUS

Compression, smoke, rattle, rebuild receipts, seller honesty

Fix cost: $250-$600

SERIOUS

Test all six gears, listen for whine, jumping

Fix cost: $400-$900

MODERATE

Coolant level, weep hole drips, oily coolant residue

Fix cost: $80-$250

MODERATE

Cold start, lights, dash, connectors under fairings

Fix cost: $100-$300

☐Cold start, listen for top-end rattle

☐Check gears shift under load, road test

☐Inspect coolant, oil pump, mix ratio

☐Verify frame numbers, service and rebuild history

Fun but fragile; abused examples cost real money