Not too hard you got a welder and some scrap? Worst comes to worst you will have to relocate a few mounts and maybe get different bushes for swing arm but im gunna bet 90% goes straight in.
Every one wants more two stroke even if they cant lay down the power troy. Im slow at best but i eat the straights up like no ones business.
You could always throw a ktm 2 stroke motor in it and then you can have the best of both worlds and always have parts
Those things always get more involved than one expects. The airbox outlet is higher on a 4 stroke, the exhaust pretty much needs to be custom built or customized. Is the chain on the same side? What is the offset of the chain from the center line of bike engine vs rear wheel.
truth hurts...a good motor swap done right is tough when holes and dimensions are off. of course there are different views and opinions of "done right"
Done right is it fits and everythings inline and tight, no undue stresses anywhere they shouldnt be and a beaut too look at.
Thanks for the input. I think I will just find a good deal on a wr 250 or 300. However: putting in a ktm 2 stroke does raise an eyebrow.
Guys over here swap engines and frames quite often ... Due to 2-3 different things, it's part of everyday life here ... Seems yamahammer engines in a honda or <any other> frame, is the ticket I see most ... Could be anything swapped anywhere really. From my prospective, unless you just like working on bikes and want to build a one-off bike, what are you expecting to accomplish with a bike like that?