We just wrapped up a local season here in Tx. using the Raptor 250 chassis with a 90 mod engine!!
There have been a few post on here with questions about doing this setup. We tried it and had great success!!!
My son won the Supermini class in the Lone Star Quad series and raced it in a few nationals.
If anyones thinking of tring this setup go for it, its a great alternative!!
Ours is currently For Sale in the mini quads section!! My son is moving to 250's
$4000 OBO