Author Topic: Machine Bent Yoshimura Exhaust? (Read 3610 times)

Greggo · « **on:** January 20, 2012, 04:07:17 AM »

Another member pointed it out in the ebay/craigslist section. It wasn't advertised as Yoshi, but it sure looks like it to me. Anybody else recognize this? I thought it was worth a chance at $125 shipped

Bodi · « **Reply #1 on:** January 20, 2012, 08:15:22 AM »

I don't have both to compare, but this looks like a Kerker header to me.

754 · « **Reply #2 on:** January 20, 2012, 08:24:01 AM »

I dont think its a Yoshi....they exit the collecter at a slight angle, most pipes are bunched closer together than Yoshi where they meet the collecter...

ALSO the collecter on Yoshi tends to be near the ceter of the engine..

Greggo · « **Reply #3 on:** January 20, 2012, 08:47:29 AM »

Here's a few more pics from the listing..

camelman · « **Reply #4 on:** January 20, 2012, 10:23:48 AM »

Greggo, can you post a side profile pic? The primary bends will be a dead giveaway on whether or not it is a yoshi.

Camelman

754 · « **Reply #5 on:** January 20, 2012, 10:29:09 AM »

They are clearly not single plane bends....

736cc · « **Reply #6 on:** January 20, 2012, 07:39:21 PM »

machine bent maybe, hand bent not

Greggo · « **Reply #7 on:** January 21, 2012, 01:44:20 PM »

Camelman, that last pic is the best I've got until it's delivered in a few days. He shipped it out the next day, so it's a good seller at the least. I'll take more pics when it's in my hands next week.

736, I definitely didn't think it was hand bent. The last one of those I saw go on ebay (I think you were watching too) went for five or six hundred dollars. I'd be happy with a machine bent pipe if it's real. The listing said it came off a '77, so it would probably be a later piece either way.

Anybody have pics of real machine bent Yoshimura pipes?

754 · « **Reply #8 on:** January 21, 2012, 01:51:44 PM »

I HAVE SEVERAL IN MY SHOP BUT NO CAMERA
I can tell you this the two pipes closest to motor angle out from the collecter, collecter is under middle of motor, and pipes are vbent in a single plane. That means if you cut off the pipe at the weld, and laid it on a table with the head portion hanging off the edge, the pipe would lay flat... not like yours..

Retro Rocket · « **Reply #9 on:** January 21, 2012, 06:39:51 PM »

I'm with Frank, its not a Yoshi, as he said, the collector should be under the middle of the engine and central to the headers, not tilted off to the right. On the Yoshi, all the bends from the collector back are in the tail pipe section, no tilt either way to the collector....

754 · « **Reply #10 on:** January 22, 2012, 02:56:57 PM »

There is a good pic in "Who knows this Racebike" over in Hi-Po thread looks like what I got..

Greggo · « **Reply #11 on:** January 22, 2012, 03:00:55 PM »

Okay guys, I guess it's not a Yoshi...

Any ideas on what it is?? Is it just a MAC?

Retro Rocket · « **Reply #12 on:** January 22, 2012, 03:06:46 PM »

Kerker.? Maybe a modified Kerker.? It looks like a reasonably good pipe, don't be too disappointed....

Greggo · « **Reply #13 on:** January 23, 2012, 01:57:37 PM »

Thanks retro. I do like the look of it, and to me it does kinda look like the yoshi. I think I will have to remove the exhaust spigots to fit it to my 76K. The listing said its from a 77F.

Greggo · « **Reply #14 on:** January 30, 2012, 12:48:19 PM »

Got the exhaust in the mail very quick. Still have no idea what it is, but it's nice and light. No baffle, but lots of holes for attaching one, or a muffler I suppose. Here's more pics.

736cc · « **Reply #15 on:** January 30, 2012, 01:29:19 PM »

I'd put on a Supertrapp, infinitely adjustable and well-made.

Greggo · « **Reply #16 on:** January 30, 2012, 01:34:31 PM »

The outlet is 2.5", so I'd like to find an insert like I have in my Hooker 4-1 and pack/wrap it myself. The universal piece in the Hooker is 3.5"

lucky · « **Reply #17 on:** January 30, 2012, 02:21:33 PM »

Quote from: Greggo on January 30, 2012, 01:34:31 PM

The outlet is 2.5", so I'd like to find an insert like I have in my Hooker 4-1 and pack/wrap it myself. The universal piece in the Hooker is 3.5"

No need to wrap the baffle if you get the right style.
That fiberglass just blows out all over the environment.
Do you want yourself or others to breath that glass?
Point one of those glass packs outside and look at all that sparkly glass blowing out when you hit the throttle.

Bodi · « **Reply #18 on:** January 30, 2012, 03:04:15 PM »

It totally looks like a Kerker header to me with the new pics. I would put a Supertrapp on it as well, but a baffle in that straight section could work out. I think it would cook a passengers foot though. You will need some support so it isn't hanging and bouncing on the exhaust flanges.
Kerker mufflers used rock wool packing I think, fiberglass does not last very long in a muffler baffle. They also rusted out rather quickly, so it isn't unusual to find the header with no muffler.

754 · « **Reply #19 on:** January 30, 2012, 08:18:15 PM »

Cone Engineering may have baffles Aircone had em too, but I think they disappeared..

bwaller · « **Reply #20 on:** January 31, 2012, 04:50:17 AM »

Like Bodi I agree it could be Kerker, different than mine though although that isn't unusual. I don't remember what the Action Fours pipe was like.

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Author Topic: Machine Bent Yoshimura Exhaust? (Read 3610 times)