Okay, now I understand and sorry I have no idea of the size, can't you just measure your own headers?
Surely the pipe angles and fitting points will be all wrong on the Gen 1?
Why don't you just get some twin pipes that are designed to fit your bike in the first place?
I know they are a bit more expensive, but how about these [size=78%]http://www.campbellcustom.co.uk/Yamaha%2...001-05.htm[/size]
This is what they sound like on the Gen 2 [size=78%]http://youtu.be/bTrglPo530A[/size]
Surely the pipe angles and fitting points will be all wrong on the Gen 1?
Why don't you just get some twin pipes that are designed to fit your bike in the first place?
I know they are a bit more expensive, but how about these [size=78%]http://www.campbellcustom.co.uk/Yamaha%2...001-05.htm[/size]
This is what they sound like on the Gen 2 [size=78%]http://youtu.be/bTrglPo530A[/size]