Hi, I just put a set of aftermarket mufflers on my vf 700f. They say F1R on them. Thats all i know about them. I was unable to find any pics or anything on the internet about them.I got them off a bike in a salvage yard. The just replace the stock cans. the stock collector is still there. Does anyone have experience with these? Do i need to rejet? Does anyone know what carb settings to use with these mufflers? any help is apreciated.
Those are Cobra's. You might gain a tiny bit by rejetting; but probably not. Google 'Cobra motorcycle exhaust' and you'll find them. They're still around.