Casa Lambretta close ratio gearbox for road and race engines
CASA LAMBRETTA close ratio gearbox for all Lambretta LI, LIS, SX, TV (Series 2–3), GT, DL, GP. This 4-speed gearbox is designed for all Lambretta scooters of Series 1 LI, S2, S3, GP / DL, SIL or Serveta. All components are forged from extremely high-quality steel and feature a completely new tooth profile for maximum durability. The gear ratios were selected by Casa Lambretta to offer a sporty 4-speed gearbox. Since 2017, it has proven itself in countless races and even more road engines.
Perfect gear spacing for road and track
The gearbox is perfectly matched.
- Main shaft - gear wheel (same ratio as) % jump
- 1st gear = 11-50 (same as LI 150)
- 2nd gear = 14-41 (same as LI 150) 55% jump from 1st
- 3rd gear = 16-39 (same as LI 125) 20% jump from 2nd
- 4th gear = 18-36 (same as GP 200) 22% jump from 3rd
Advantages of the Casa close ratio gearbox:
- Close and even gear steps of around 20% from 2nd to 3rd and 3rd to 4th gear
- Same final drive ratio in 4th gear as a GP200 gearbox
- Top speed of approx. 15 km/h per 1,000 rpm with 18×47 sprockets
IMPORTANT: This gearbox is ideal for most Lambretta engines – BUT NOT FOR: SST, SSR, Chimera and similar high-performance setups! For these, use the Casa Performance 5-speed Cyclone gearbox.
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