I've just put this up for checking Lambretta gearbox data on your phone.
There's more detailed data available elsewhere, but this is in your pocket for quick reference!
It has every known Lambretta gearbox (let me know if you think I've missed something), and details:
- Tooth count
- Secondary ratio
- % gap between gears
- The top gear final ratio for every available sprocket combination
- MPH/1000RPM for every available sprocket combination
- Estimated chain lengths for every available sprocket combination
There's a quick YouTube demo here, and you can find it here
