Hello! This probably isn't a lot of help to you, but on my Victor Special I fitted a new peanut silencer ordered from Armours & had to gently tweek the mounting bracket in the vice so it lay flat on the frame mount. I've got non standard alloy mudguards fitted, so clearance wasn't a problem for me - & thats with the exhaust pipe tight against the inside of the frame....It doesn't look too weird as its gotta clear the rear shock.