UXPW 125 ENGINE SERVICE MANUAL AND EFI DIAGNOSTIC
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7.3.4. Dismantle locknut on magneto. Use special
tools to dismantle magneto rotor
7.3.5. Check needle bearing, woodruff key on
crankshaft for damage
7.3.6. Clean off engine oil from tapered face of
crankshaft. Install magneto rotor and
turning the gear on crankshaft, thus align
keyway with woodruff key
7.3.7. Install washer and locknut.