any ideas of an engine swap??

Yea but they rip your ass off the seat fast even with FMF pipes. no ofense to FMF users out there but evers since Ive had my toomey Ive felt as though Ive seen the light. that and their damn near indestructable and are as light as any bike is ever gonna come even 2-strokes dont need to be you might be able to find a used 300 on craigs list on ocasion for like 900 bucks youd get your money back selling off the blaster motor for more add onsI:I:DI:I
 
A kx 125 is a really easy one. Just got done riding mine. Takes like nothing to have it finished. My next is going to be something insane though. Like a 1200cc buel in a banshee frame. Lmao. But i will NOT kill my banshee to do it. A cr 500, cr 250, or yz 426f, 250r, kawasaki tecate, 200x, 350x, or ninja 250 are all things i wanted to try putting in a blaster. Theres a few ideas people prolly have never done. As for a banshee in a blaster, dont.... They are to short and you would die. Hahaha...
 
Any rotax twin
the 440-670s are the same size externaly the 583 will make 100hp with a single pipe for years with zero maintance using pwc cases the carbs and pipes could both face thr rear