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Help me identify this exhaust
Well I've finally joined the litrebike club and picked up a '79 XS11SF for $400. 23k miles and it's in decent shape; I was even able to ride it home.
Anyway, it came sans airbox and with UNI pods which were nasty and falling apart. I replaced with K&Ns I had on hand and now it's in dire need of jetting.
So for reasons of getting some ballpark jet numbers (and out of curiosity) I'm trying to figure out what exhaust I've got. Fit and condition are great, and it has an OEM look, but a few things make me thing it's not:
1) Louder than I'd expect for a stock system. Everyone who hears it run has noted the volume. It's a pleasing deep snarl, IMHO, but definitely on the loud side. Can't really have a conversation without shouting while it's warming up.
2) Flat, not finned, metal flanges holding it to the head.
3) No crossover pipe. Not removed and capped off or anything like that, this system just doesn't have a crossover.
4) All the pictures I see of Specials have megaphone-style mufflers, and these are skinnier with tapered ends.
5) Condition is better than I'd expect for the original almost 30-year old exhaust.
6) Mufflers appear to be clamped, not welded, at the collectors.
I couldn't find any markings on the cans. Here's some pictures, including some closeups of a baffle. Never mind the gas slick from leaking left petcock...
Anyway, it came sans airbox and with UNI pods which were nasty and falling apart. I replaced with K&Ns I had on hand and now it's in dire need of jetting.
So for reasons of getting some ballpark jet numbers (and out of curiosity) I'm trying to figure out what exhaust I've got. Fit and condition are great, and it has an OEM look, but a few things make me thing it's not:
1) Louder than I'd expect for a stock system. Everyone who hears it run has noted the volume. It's a pleasing deep snarl, IMHO, but definitely on the loud side. Can't really have a conversation without shouting while it's warming up.
2) Flat, not finned, metal flanges holding it to the head.
3) No crossover pipe. Not removed and capped off or anything like that, this system just doesn't have a crossover.
4) All the pictures I see of Specials have megaphone-style mufflers, and these are skinnier with tapered ends.
5) Condition is better than I'd expect for the original almost 30-year old exhaust.
6) Mufflers appear to be clamped, not welded, at the collectors.
I couldn't find any markings on the cans. Here's some pictures, including some closeups of a baffle. Never mind the gas slick from leaking left petcock...
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