LW classes!

[EX_#76]

I've come across an abomination I was interested in trying to run LW or ULW with and couldn't find anything stating if it would be legal,... I'm assuming it wouldn't be but I thought I'd ask here:

Would a Derbi RS50 with  CR250 motor stuffed inside be legal? It's 2 stroke air cooled so I guess the motor would be okay but do the motor & frame have to be from the same manufacturer?

Let the flaming of the n00b commence... :)

GTL and GP are unrestricted as long as displacement limits and section 5 regulations are followed.  I think there is a clause in section 5 about minumum tire diameter that would impact a project like that.

[Duc-Hunter]

It has 17" wheels. It's comparable to an Aprilia RS 50, not a pocket bike sized machine. I was thinking of LW & ULW Superbike because of Section 6.3.1.A "single cylinder motorcycles may use any frame or engine" and it isn't a purpose built GP machine like the RS125, it's more of a backyard creation. But yeah I guess worst case I could at least run the GT classes.... thanks