rgv500 engine in rs250

[F5 Dave]

Surely you're thinking of an RG500 motor? Christ knows where you'd get a RGV500 motor from.
. . .

Early morning break in to Manor Shwantz?

[pritch]

Anyone got any other tips like turbo/supercharge/fuel injection or would rg500 idea be best?

Ummm don't want to discourage somebody who is dead keen, but is that a bike you're building or a grenade?

[Drew]

Supercharge/turbo a 2 stroke???????

It can be done, but so much fucking around to keep the fuel mixture right is required, it would become just a huge pain in the arse.