Bike engine, car gearbox. Hypothetically.

[Lefty]

For a really light kit car l, say 500kg. Could you mate a big inline 4 bike engine with a gear pre-selected into a car gearbox?

I'd imagine you'd need to somehow sort a flywheel/clutch. Has this ever been done?

I just watched a video of a z-cars Hayabusa Elise. The bike gearbox just looks a massive pain in the ass and the clutch probably a real weakness.

[Lefty]

I know the Morgan 3 wheeler has an mx5 box but the v-twin would have had a separate transmission in a bike anyway, right?