Yamaha Zuma 50
Engine: Minarelli Vertical 50 Air Cooled
Rollers 15 x 12 – Main Jet: Gurtner type / Dellorto 6mm (Varies on year model)
Factory restrictions: CDI RPM restriction, variator washer
Tyres: 120/90-10
Common faults: Oil pump leak, weak engine casing casting – prone to cracking under stress
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