MAC/Yoshimura exhaust systems.

  • mark1122
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  • Keep twisting it
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30 Apr 2012 18:50 #518862 by mark1122
Replied by mark1122 on topic MAC/Yoshimura exhaust systems.
cant say i've seen that 1 before? what bike is it on?

76 KZ, frame gusset work,1200CC.Ported by Larry Cavanaugh, 1.5mm.over intakes, Carron Pipe, ZRX12 rear end, and seat,96zx9 front end.
01 CBR600F4i Track bike.
Cobourg, Ont. Can.

~ ~ ~_@
~ ~ _- \,
~ (k) / (z)

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30 Apr 2012 21:49 #518904 by Roca
Replied by Roca on topic MAC/Yoshimura exhaust systems.
1980 kz550 c2

1980 KZ550-C2 LTD Custom

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01 May 2012 00:24 #518955 by mtbspeedfreak
Replied by mtbspeedfreak on topic MAC/Yoshimura exhaust systems.
It's likely a Mac. The only aftermarket 550 exhaust I've seen was made by Mac. Looks like someone added a reverse cone exhaust tip though.

2000 ZRX 1100
1976 KZ 900- Daily Driver
1980 LTD 550- Dalton Highway survivor!

If it has tits or tires, it'll give you problems!
The following user(s) said Thank You: Roca

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  • BlackZ1R
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01 May 2012 02:58 #518981 by BlackZ1R
Replied by BlackZ1R on topic MAC/Yoshimura exhaust systems.
Actually looks like someone welded a Harley sportster muffin on it. I bet it is LOUD!

Kawasaki


Someone once told me to marry that motorcycle I was riding ......there's times I wish I hadda listened .

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01 May 2012 04:11 #518986 by Roca
Replied by Roca on topic MAC/Yoshimura exhaust systems.
Maybe so, there are other sportster parts on the bike.

1980 KZ550-C2 LTD Custom

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06 May 2012 04:56 - 06 May 2012 05:03 #520137 by s1elr
Replied by s1elr on topic MAC/Yoshimura exhaust systems.
sorry I did not mean to hijack thread....


down tube spacing outside to outside is 12.75...
1 to 2 and 3 to 4 is 3 3/8 ctr to ctr..
2 to 3 is about 5" ctc.
os size tube is 1.5
collector size is 3" I think this is for
kz650-750,, but meg section is huge,
and would fit for large bore cc.
any info would help.ty.steve
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Last edit: 06 May 2012 05:03 by s1elr. Reason: made mistake on response, add pics

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06 May 2012 10:14 #520157 by stephenzone
Replied by stephenzone on topic MAC/Yoshimura exhaust systems.
one on the left on the orange zed is a yosh. one on the right is a wolf. i also have a denco sidewinder somewhere in the attic that i should drag down and take a pic.

71-H1 Cafe w/750 engine
73-Z1 wifey's 1105cc
74-Z1 RatRod 1393cc
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06 May 2012 15:41 #520227 by GypZee
Replied by GypZee on topic MAC/Yoshimura exhaust systems.

stephenzone wrote: one on the left on the orange zed is a yosh. one on the right is a wolf. i also have a denco sidewinder somewhere in the attic that i should drag down and take a pic.


Pipe diameters? Looks like the baffle in your Yosh is smaller than mine.

83 GPz1100
85 GPz550

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06 May 2012 15:45 #520229 by GypZee
Replied by GypZee on topic MAC/Yoshimura exhaust systems.

s1elr wrote:








Now that looks like my pipe,have a look


Yep, they look the same! I have the tag which is identical to yours in my toolbox, waiting to go back on after I get the collector coated. What are your pipe diameters? They do NOT look the same as MAC to me.

83 GPz1100
85 GPz550

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12 May 2012 00:14 #521704 by s1elr
Replied by s1elr on topic MAC/Yoshimura exhaust systems.


Attachment yoshipipe023.jpg not found



Attachment yoshipipe012.jpg not found



Hi, new pic of end of meg, on my yoshi. down pipes seem to fit kz650/750?
as seen in previous post. but collector exits with a 3" id into the 1 piece mid pipe.
ty 4 looking.s1ele//steve
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13 Feb 2013 02:38 #572213 by bonehead30
Replied by bonehead30 on topic MAC/Yoshimura exhaust systems.
Since I came across this thread and the Gunny has a hell of a lot of knowledge on the old style Yoshis, I thought I'd try it out here. Can anyone ID this exhaust? Sorry for reviving an extremely old thread :ohmy:



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13 Feb 2013 15:00 #572247 by mtbspeedfreak
Replied by mtbspeedfreak on topic MAC/Yoshimura exhaust systems.
It looks like a Yosh Series II - though, it should be in 2 pieces, the header and the muffler.

2000 ZRX 1100
1976 KZ 900- Daily Driver
1980 LTD 550- Dalton Highway survivor!

If it has tits or tires, it'll give you problems!

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