Gasbike gearbox?

[motorhedfred]

Due to the vague descriptions on the gasbike website, I can't really tell what this is/does. It doesn't appear to have enough parts to function as a transmission gearbox.

Does anyone here have experience with it?

https://www.gasbike.net/products/49cc-4-stroke-gearbox

 

[Venice Motor Bikes]

That looks like a centrifugal clutch for a 80cc 2-stroke engine

 

[motorhedfred]

If it's two gears running together, the output sprocket would be reverse rotation. If you could fit it up to a 79cc Predator, you could mount it cylinder forward. It would look and fit better in smaller frames.