I bet the exhaust will sound good 
Thanks Dave, first time i have cut the rear off a frame and welded in a hoop, which was slightly disconcerting.
I decided to mod this bike as putting it back to original was just too expensive with the cost of yamaha stock parts. It needed a lot.
At idle its quite quiet, but throaty when being opened up, so far seems good. Not ridden it much yet though (thanks covid)!!!