short exhausts with rearsets - ZX6R Forum
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post #1 of 18 Old 11-09-2016, 06:13 PM Thread Starter
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short exhausts with rearsets

So when i first picked up my 2015 636 i unaware that rear sets were in my future. I went to my first track weekend and fell in love.
I was going to order woodcraft rearsets but found out they don't fit with shorty exhausts.. My next bet is to get sato rear sets. I emailed sato and they said
they weren't sure if it would fit or not.. Does anyone have any experience with this? Do you have to mod the shorty's to fit rearsets? Or do i need to buy a new exhaust system
so i can get adjustable rearsets... Thanks

Last edited by Ray Robinson; 11-09-2016 at 08:35 PM.
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post #2 of 18 Old 11-10-2016, 11:17 PM Thread Starter
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bump for help
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post #3 of 18 Old 11-11-2016, 02:52 AM
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bump for help
Not sure I understand why the exhaust has anything to do with how the rear sets mount. The issue I can envision is that the shorty may be pointing the exhaust right at your foot, with how much further 'back' your foot would be on a rear set.

The M4 GP that was mounted on my '09 when I bought it, melted a hole in my textile pants when I stood at a stop light with my leg on that side holding the bike up. Pretty intense heat.

I say this, because there was no mechanical connection between the M4, and the peg. No interference, no shared bolts.

I cannot envision the foot control mounting system changing between the '09 and the '15..... The significant differences between the two are the increased displacement, different fork, and more electronics.... body work is a minor thing, IMHO.

"There's this adage that we have 2 ears and one mouth so we should listen twice as much as we talk. Unfortunately with the Internet people have taken this old adage and turned it around. They have two eyes and 10 fingers so they think they need to post 5 times as much as they read. And since they have 10 fingers and one brain, they only have to think 10% of the time! "
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post #4 of 18 Old 11-11-2016, 10:48 AM Thread Starter
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I cannot envision the foot control mounting system changing between the '09 and the '15..... The significant differences between the two are the increased displacement, different fork, and more electronics.... body work is a minor thing, IMHO.
the two brothers rear sets comes with a bracket that sits behind the stock rearsets.. i'm just assuming that the bracket won't fit there anymore with aftermarket rearsets. I'm not 100% sure why it doesn't fit but
i found here on the forums someone was having issues with their vortex rearsets not fitting with a twobrothers exhaust and had to sell the muffler. Also in the footnotes on revzilla's website for the woodcrafts, says does not fit with two brothers exhaust. Im not 100% sure whats going on there but that's why im asking for help.
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post #5 of 18 Old 11-11-2016, 12:28 PM
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@PainfullySlo has full m4 exhaust and woodcraft rearsets with no problems in fitment.

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post #6 of 18 Old 11-11-2016, 03:12 PM
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Quote:
Originally Posted by Ray Robinson View Post
the two brothers rear sets comes with a bracket that sits behind the stock rearsets.. i'm just assuming that the bracket won't fit there anymore with aftermarket rearsets. I'm not 100% sure why it doesn't fit but
i found here on the forums someone was having issues with their vortex rearsets not fitting with a twobrothers exhaust and had to sell the muffler. Also in the footnotes on revzilla's website for the woodcrafts, says does not fit with two brothers exhaust. Im not 100% sure whats going on there but that's why im asking for help.
If the 2 Bros uses the mounting point for the rearset as one of the points that holds on the muffler, I can see the thickness of the bracket causing an offset on the mounting point. If it only hits one of the three points, it would end up tilting the plate that is the body of the rear set..... that could cause a lot of mechanical stress on the plate, and may lead to it cracking.

You could shim that difference out with washers that are as thick as the bracket, so you put the plate back on the plane it was meant to be installed in. Or, you could remove material from the back of the plate to provide a pocket for the muffler bracket. Me, I'd buy some cheap washers and see it that works out before I'd look into another exhaust.

"There's this adage that we have 2 ears and one mouth so we should listen twice as much as we talk. Unfortunately with the Internet people have taken this old adage and turned it around. They have two eyes and 10 fingers so they think they need to post 5 times as much as they read. And since they have 10 fingers and one brain, they only have to think 10% of the time! "
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post #7 of 18 Old 11-11-2016, 04:10 PM
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I've seen plenty of people running short exhausts, including the M4, with aftermarket rearsets like Woodcraft or Vortex and fit just fine. I'm not sure what the problem is.

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post #8 of 18 Old 11-11-2016, 06:44 PM
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Yep, I am running M4 shorty with Woodcraft rearsets just fine. Not sure what the issue is.

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post #9 of 18 Old 11-12-2016, 03:03 AM
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OP,

Most shorty exhaust systems remove the pre-chamber between the header and the muffler, and that would probably resolve the need for a bracket to support the muffler. If it clamps right onto the header, there is plenty of mechanical strength to support it.

"There's this adage that we have 2 ears and one mouth so we should listen twice as much as we talk. Unfortunately with the Internet people have taken this old adage and turned it around. They have two eyes and 10 fingers so they think they need to post 5 times as much as they read. And since they have 10 fingers and one brain, they only have to think 10% of the time! "
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post #10 of 18 Old 11-12-2016, 06:58 AM
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Quote:
Originally Posted by PainfullySlo View Post
Yep, I am running M4 shorty with Woodcraft rearsets just fine. Not sure what the issue is.

Are your rearsets adjustable?They don't look like they are.
I suppose ops' problem is that if you adjust the rearsets back and down, they touch the exhaust, or the exhaust blocks them, making them non-adjustable.
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post #11 of 18 Old 11-12-2016, 11:26 AM
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Are your rearsets adjustable?They don't look like they are.
I suppose ops' problem is that if you adjust the rearsets back and down, they touch the exhaust, or the exhaust blocks them, making them non-adjustable.
They are the only rearsets that Woodcraft makes for this bike. There is some adjustment in them, about 1/2" in any direction from the starting position. Since the OP specifically stated Woodcraft rearsets in his post I thought this would be sufficient.

Vortex and some other brands use giant adjusting blocks which make the riding position more adjustable. THOSE rearsets I have heard issues with shorty exhausts simply because there is a giant clunky intermediate plate with a ton of holes drilled in it which gets in the way.
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post #12 of 18 Old 11-13-2016, 01:13 AM Thread Starter
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Yep, I am running M4 shorty with Woodcraft rearsets just fine. Not sure what the issue is.

i said woodcrafts because it was the first thing that popped up on revzila when i was looking and in the footnotes said it would not fit on the bike with a shorty exhaust....
I've emailed a few companies and they said they would not fit.. I even called revzilla and they said more than likely all aftermarket rearsets wouldn't fit.
But in your case they do fit. did you do anything special or did it just bolt right up with no fitment issues? Also i'd be raising them and moving them back. I've been looking at Sato rearsets recently.
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post #13 of 18 Old 11-13-2016, 01:45 PM
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Quote:
Originally Posted by Ray Robinson View Post
i said woodcrafts because it was the first thing that popped up on revzila when i was looking and in the footnotes said it would not fit on the bike with a shorty exhaust....
I've emailed a few companies and they said they would not fit.. I even called revzilla and they said more than likely all aftermarket rearsets wouldn't fit.
But in your case they do fit. did you do anything special or did it just bolt right up with no fitment issues? Also i'd be raising them and moving them back. I've been looking at Sato rearsets recently.
With Woodcraft, there is only one way to install them so yes, I bolted everything right up without an issue.
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post #14 of 18 Old 11-13-2016, 08:55 PM
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Another member mounted his graves exhaust with vortex rearsets with minor modifications.

M4 GP & Vortex Rearset Compatibility issues?


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post #15 of 18 Old 11-14-2016, 05:34 AM
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My vortex rearsets have interference issues with my M4 (09 zx6).

Mine are all the way back on the top hole. I can't move them down unless I move them forward. I can take a pic later of anyone is interested. I don't like the M4 for that issue and when I had the factory rearsets my heel was behind the pipe and the exhaust gas burned a hole in my boot. It hurt bad. I ended up JB welding them and wrapping that area with fiberglass insulating tape.
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