4 stroke and the crank

Building a 29'er onex ... with 4 stroke .... which forces me to use wider cranks .... Sportsman is out of stock on good wider cranks .... my kit comes with a bigger sprocket ... so I would have to pedal harder up hill and have to take off my chain guard.

want to keep chain guard and go with a smaller sprocket ......

... almost ready to dump my 4 stroke and go with a nice power 2 stroke

On that onex from wally world ... maybe just heat up the cranks with a torch and bend them?