Just called M4 exhausts
Thread Starter
Senior Member
MotoGP
Joined: Apr 2005
Posts: 5,631
From: Montreal
Just called M4 exhausts
Based on comments made by Shayne, our neighborhood Australian affiliate, about the excellent full exhaust system made by M4 for the VTR, I picked up the phone and called the company to see if they still had any kicking around. I was told that they did not (discontinued as the VTR was not a very good seller in the poser and squid saturated North American market). I then asked if they would be open to making a batch of them if I could find say ten buyers and was told no. Oh well, I tried. If anyone knows someone with an M4 system they want to part with let me know....
Senior Member
MotoGP
Joined: Aug 2006
Posts: 2,934
From: altoona, pa
Based on comments made by Shayne, our neighborhood Australian affiliate, about the excellent full exhaust system made by M4 for the VTR, I picked up the phone and called the company to see if they still had any kicking around. I was told that they did not (discontinued as the VTR was not a very good seller in the poser and squid saturated North American market). I then asked if they would be open to making a batch of them if I could find say ten buyers and was told no. Oh well, I tried. If anyone knows someone with an M4 system they want to part with let me know....
hell, you'd think if they already did all the hard stuff, that running off a few copies would be no big deal. i guess they don't need the business or it's more trouble than we think.
Senior Member
SuperBike
Joined: Aug 2005
Posts: 1,864
From: Fort Wayne, IN
Yeah, it really is a lot of trouble. When you are cranking out systems one after another of the same thing and have to stop, change your setup, get different parts, etc, etc it's a pain. Plus the chances of getting something wrong is really high, even when changing back to your big sellers. You don't want to hurt your cash cow just to sell a couple of systems.
That said, I'll bet they batch their production anyway based on an economical quantity. If you could figure out where that point is then maybe you'd have a chance at getting them to make some for you.
Thread Starter
Senior Member
MotoGP
Joined: Apr 2005
Posts: 5,631
From: Montreal
The sweet part of the system (according to Shayne,I have never seen one) is the header itself. They make extensive use of balancing pipes to boost torque, a rather complex but very effective design. If I remember correctly, he mentioned a chap in Australia has one on an othewise stock engine and it pumps out 112 hp! Imagine what that set-up would do with cams,....
Senior Member
SuperSport
Joined: Dec 2005
Posts: 963
From: Sunshine Coast, Australia
Yep, as Mikstr says I have never seen another system like it. Pity I don't have pictures of it. I had all the specs recorded for it a couple of years ago (I was going to get one custom made), but ended up finding a Moriwaki full system instead which was going to be waaay cheaper than a custom one.
It used multiple diameter tube for the headers, 3 balance pipes, and was a work of art. Close clearances in fitting due to its complex design. It looked like a snake coiled up underneath the shock!!!
It used multiple diameter tube for the headers, 3 balance pipes, and was a work of art. Close clearances in fitting due to its complex design. It looked like a snake coiled up underneath the shock!!!
Thread Starter
Senior Member
MotoGP
Joined: Apr 2005
Posts: 5,631
From: Montreal
Shayne, any idea how it performs across the rev range? (ie. is it torquey across the board or mostly top-end biased? I would to tend to think teh former given all the trouble to add crossovers and the like)
cheers
cheers
Senior Member
SuperSport
Joined: Dec 2005
Posts: 963
From: Sunshine Coast, Australia
Not sure. But as you say the dyno figures for peak horsepower were good for a bike with stock internals. So it certainly works well in the upper rev range.
I am inclined to agree with you though, given the varying pipe diameters used. If you were building a race system you would have larger pipe for the primary section I think.
From memory, I reckon they went to a lot of effort to make a pipe for the rear cylinder of similar length to the front, that is why there is so much pipe work near the shock.
I am inclined to agree with you though, given the varying pipe diameters used. If you were building a race system you would have larger pipe for the primary section I think.
From memory, I reckon they went to a lot of effort to make a pipe for the rear cylinder of similar length to the front, that is why there is so much pipe work near the shock.
Member
Squid
Joined: Feb 2009
Posts: 31
There's a set of M4 cans on ebay.co.uk at the moment (and for only £132.99, naff all for anyone outside the UK, bloody weak pound, grr)
However, as you say, its the headers people want
http://cgi.ebay.co.uk/VTR1000-Firest...3A1|240%3A1318
All the best, Joe
However, as you say, its the headers people want
http://cgi.ebay.co.uk/VTR1000-Firest...3A1|240%3A1318
All the best, Joe
