exhaust systems

[cat]

[dmon722000]

The M4 and just about everything I've seen on Baghiras look like dog shat and performes even worse. What these MFG's are missing in the "point" section of a slip-on is the size of the canister is critical to the output of the motor. Their canisters are too small and cannot cope with all of the air being forced through them to be efective in the "scavenging" part of the intake cycle (remenber valve overlap anyone?) Through good ol' pencil, paper, and calculator I came up with a canister that not only looks good, but sounds great, and added an honest 9 rear wheel horsepower. It was easy to do also. The solution was to purchase a set of ARROW Hayabusa slip-ons (2). I only had C/fiber at the dealer I was working at. I had to replace it at 23,000 miles wich is an eternity for 95% of most of ya'll so dont sweat it. I mounted the pipe in a distinct 45 deg. angle (KTM'ish) and just had a connector pipe section handled by any muffler shop. The reason for the Busa' setup is the cans volume can handle what the motor is developing in the means of expansion and flow and the inlet to the pipe is 74mm with the exit of the pipe is 60mm. this acts like a reverse megaphone style exhaust wheras the gasses entering the pipe is trying to fill the large void in the can (50mm y-pipe to a 74mm exhaust can inlet) this allows the gasses to speed up (and out) allowing for better V.E. and a helluva lot of torque. This is a proven performance upgrade with well over 40,000 miles of torture testing. The picture provided is for use as an example of what needs to be done. Do what you need to do in your own quest for a better looking/performing bike. The MZ is well worth the effort. Any questions about anything said, please dont hesitate to ask... Regards, Dwight

[cat]

hey Dwight

How'd you get the 50mm to the 74? Is that a cone/converter at the inlet to the can?

[dmon722000]

AHHH yes, the most challenging feat of the act. Well, ya see, it goes like this... The can is quite large and has a massive inlet opening and I had to mate it to a smaller pipe wich is off angle and axis. So either we (my machinest friend and me) make a short connector pipe (roughly 4" long) shaped like a twisted "L" , seemingly impossible, but then the anser was laying right in front of us, literaly. We had some old scooter pipes laying around and we figured that if we cut a pair of "cone" shaped sections and welded them together (looking like a metal christmas ornement) we could then stick one end of the cone into the Y-pipe (the natural 45 deg angle of the cone allowed us to play with the angles) with the cone in a relitive position to recieve the exhaust can now. Now that we were all mocked up with the pipe straped into place with large stainless hose clamps (2) (indestructable, rustproof , and cheap) we marked the cone where it enters the Y pipe, then cut the marked section off so now it will be "flush" when we welded it to the Y pipe (no obstruction inside the pipe cause we cut if of ya see). Now we made a circular exhaust mounting disk that we can use to bolt on the 'Busa can. Thru R&D we now use a welded sleeve through the Disk to support the can more positively and we added a fire proof o-ring where to can slides over the tube in a "male/female" arrangement. We repeat the same "mark, cut, weld" for the other end of the cone to the mounting disk. Weld everything up, bolt her up and that was that. In effect the "double cone" arrangement used in this mod acts like a mini "power bomb". This MZ (I worked at a Dealer for years) performes like no other with the same mods. If you have the time and the beer, try it out.

[dmon722000]

oh yeah, Good eye by the way, spotting the cone and all...

[phlat65]

i think you are on to something. I have 2 complete systems for my bike, a open FBF carbon can, and a dual system using 2 stock Ducati 748/996 cans, with isolated head pipes. the duc cans have none of the stock baffling removed, are very quiet, and feel stronger on the bike than the loud open "race" can. If you look at the euro sm competition bikes, lots of them use HUGE cans, or twin systems.

[Mark]

gz Mark

[keithcross]

Nice looking can there. Not to sure about the pipe welded at an angle though, might effect gas flow.
Still it looks the business.

Keith

[dmon722000]

I like the can set-up you have there.... fo' sho! The slash tip looks cool and it came from a Yamaha too. As for the 45 deg angle I think you know first hand how difficult it is to make that angle meet. I actuall cut my Y pipe further down where it is first starting to cone (called the "first diversionary cone" in exhaust speek). The "double cone" method I used was a God send and it was easy to do (see previous post). The internal area of the exhaust can must large on these big singles to reap any benefits through scavenging. Anyway, the bottom line is that my bike and how I woop its butt every time I ride it never let me down and is still going strong. I am pondering on having my Y pipe manufactured, with my ingenious pipe mounting bracket (rubber mounted of course...)and sell it with the clamps for $x.xx? I'll use a GSXR 1000 silencer (same size but, can be purchased 1 at a time v.s. the 'Busa's pair) What do you think?

[cat]

Very good. What bike is it from?

What is the thing near the headlight that looks like an overflow container?

Keith, the angle... yes, there should never be sharp angles. It would cause some turbulence and so maybe waves going backwards.
Always the best way is to get ready-made mandrel bends and start with that.

[roge-a-billy]

Mark, how much work have you done to your bike? keep on seeing things closer I look. Air box removed, are you runing 2 foam air filters? The main thing is what is the front brake caliper?? Brembo?? how did you mount it to the forks?

[roge-a-billy]

Just looked at your very good web site. Front brake nissin off a VTR with home made (good) bracket. Every body should click on his profile and then his site. I like to get some use from my tyres but that impressed me

[cat]

:shock: Just looked at your very good web site. Front brake nissin off a VTR with home made (good) bracket. Every body should click on his profile and then his site. I like to get some use from my tyres but that impressed me

is this new? why haven't i seen it? i thought i'd been through them all.
i'm supposed to be working. - and in a few minutes - or sometime today - i get to have my 'fireside chat' with my manager, the annual 'performance review' thing. the only performance i know is.... you know.
and the exhaust talk is on again.

[keithcross]

I wouldent mind being able to read the bit about fitting a better front brake caliper to the baggi in English, cant read German Looks like a spacer has been fitted to teh disc as well, any idea how thick this would have to be? Might be able to make one of these and teh caliper mounts myself

Keith

[CM]

He has a Nissin 4 cylinder caliper. He made a caliper adapter by himself and a distance piece to move the brake disk away from the spokes.

It´s an Yamaha R1 exhaust.