400ex swinger on 300ex frame

[1995300ex/400ex]

can u put a 400ex swing arm on a 300ex frame? if its hard will need to do it or not worth it any suggestion wud be great thnks

[honda300EXtreme]

it can work, personally i have a 400ex swinger on mine,

but i had to grind the piss out of the right side of the swinger so the rear sprocket would align correctly with the front,

and your also gona have to change the rear shock, your best bet would be a 250r rear shock,