PIAGGIO Vespa 125 Super Operation And Maintenance page 10

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Fig. 7
1. Gear change twist grip - 2. Clutch control lever - 3. Gear change cables - 4. Gear
shifter - 5. Selector stem - 6. Selector spider - 7. 1st gear - 8. 2nd gear - 9. 3rd gear - 10.
Top gear - 11. Mainshaft - 12. Spring gear - 13. Clutch.
N. B. - The positions 1 - 2 - 3 - 4 on the change twist grip correspond to bottom, 2nd, 3rd
and top gear respectively; the n 0 u indicates neutral.