exhaust choices

[Pat Kelly]

The reason I put the Jardine on my E was a) the OEM exhaust was in sound shape (no pun intended) but had bad surface rust, and b) I got them for a great price.
On my LG I put the aftermarket on because the OEM exhaust was in 99% perfect shape. A small bit of rust and one hole in a muffler. I want to keep the OEM exhaust(s) archived. Both bikes have all the parts to put them back to (cosmeticlly) stock.

[John]

I switched to the Spaghetti pipes before I did the big bore, ('cause they looked cool) but after that was done, I don't think the stock pipes would flow well enough for the increased HP.

[desert1]

Stock to 4 into 1

I've had 4 different exhaust setups over the last 8 yrs, still have the stock Xhaust hanging in the shed but now I'm going with 4 int 1 all stainless supertrapp system, would like to know who else has this system and what they think of it......Bruce

[motoman]

Yeppers.......realize some because of where the bikes spent there abused life have no choice but to go to modified aftermarket systems. To just change intake and exhaust 'just cause' it sounds or looks intimidating is stiffling the performance, aside from having to figure jetting etc. to get the bike back to somewhere close to performing well through all the RPM range would seem to be a pain to me, and still it won't quite out perform the stock set-up. Statistics here for some 1/4 mile times at an almost sea level location speak for themself after mods that become a mood point when the bike passes through the traps at the end of the 1320ft. Our XS's are what they were..............and still a machine to contend with, even 29 yrs. later! That's more than can be said for bikes of the same era produced by other manufactures. With that all said, modify on, cause it's all about the enjoyment of trying to get more out these bikes that were in Xcess for there time anyway. As long as the end result puts a smile on, that's all that counts.

[HobbyMan]

I do agree that the stock setup is the best. There is no substitute. I am just adicted to the sound. I would never modify a stock bike this way. That is why I am goign to wait for a project bike. I the mean time, I am learning all I can on exhaust tuning. I also must make use of the shop tools why I am still in school

[Yamaniac]

Joshua

that looks like the older kerker that is on my bike now.

[Crazcnuk]

While it would seem that an engine should need, and in fact, like 0 back pressure, this is a myth. Most engines are not designed well enough to run well at 0.

Headers, true headers or tuned exhaust are designed to let complimentary cylinders actually help the next cylinder in line to exhaust better. If the system is done right, all the cylinders will fire through the last pipe in order, and the same distance apart.

You can only do this, properly, with a well designed 4 into1 system.

Now, the backpressure can be 'adjusted' to an extent by pipe diameter and resistance in the mufflers, or baffles. Generally the larger the pipe or less back pressure your torque peak will move higher in the RPM range. Smaller more restrictive exhaust moves the torque peak down the RPM range. Going too far either way will impede either the low end or the top end performance.

Most aftermarket exhaust are desiged for racing, where the torque peak is usually wanted as high up, in the RPM range, as possible.

For us street riders, having the torque lower is probably better. We aren't concerned with red line shifts, most of the time.

The Supertrapp type systems allow you to adjust these settings at will.

The stock system has a xover pipe which tries to balance the exhaust pressure on boths sides. This helps with tuning, smoothness also allows the exhaust to flow slightly better than it would w/o the xover. This is one of the first things lost on most aftermarket systems.

Also remember that 2 1" pipes have a combined crossection of almost 2.5sqin, meaning you would have to have a 2.5" pipe on a single exhaust to flow the same.

[xschop]

Crazyc Question

So Crazc, I have been looking into the Stock Suzuki Bandit 1200 Header (It's stainless). The #2 and #3 pipes are connected and the #1 and #4 head pipes are connected....Would I be wasting my time adapting these to the xs11 head?

[xschop]

stock Vs. Aftermarket

I want a stainless system.But don't want to waste my time if these won't work. The stock Bandit system with crossover at 2,3 and 1,4 headpipes ( which I can get CHEAP!!!).....
and the aftermarket system with no crossovers (not so CHEAP!!!)

[Brian_D]

Re: Crazyc Question

Originally posted by xschop
So Crazc, I have been looking into the Stock Suzuki Bandit 1200 Header (It's stainless). The #2 and #3 pipes are connected and the #1 and #4 head pipes are connected....Would I be wasting my time adapting these to the xs11 head?

xschop, I might be mistaken but it appears as the same design Jardine used for their 4-2 and 4-1 pipes for the XS1100. search for spagetti pipes here on the forum - these show the #1 & #4 connected as well as the #2 & #3 - same as the coils for the cylinders still trying to score a set of these pipes - might talk some friends at an exhaust shop to see if they could replicate them.

[xschop]

SPAGETTI-O'S

ANY PICS OF THESE? HEADERS WILL BE GOING ON THE CHAIN CHOP...I AM GOING THIS AFTERNOON WITH A TAPE MEASURE TO CHECK ON A BANDIT....THESE ARE STAINLESS THAT'S WHY I AM CHECKING UP ON THEM...BTW WHAT'S THE DIA. OF THE PIPE COMMING OFF THE XS11 HEAD...I'M AT WORK AND WANT TO CHECK IT AGAINST THE BANDIT, OH YEAH WEATHER HERE SUCKS AND FORCED TO TAKE THE 4 WHEELER....

[thewiz]

exh gasket size

Hey, Chop .... just measured an exhaust gasket and it is OD 44.958 and ID 37.33. I measured in inches and did the math.

[Brian_D]

may have spoke too soon - not sure the Jardine 4-1 actually has the 1-4 and 2-3 crossover. However, the Jardine 4-2 definitely does, HERE is a thread where John posted a good pic of his 4-2 system.

[xschop]

THX WIZ

THANKS. i HAVE AN EXTRA HEAD I MEASURED LAST NIGHT AND MEAS. WAS AS YOU SAID. THE BANDIT 1200 CRUSH GASKETS FROM ONE SITE SAID 42MM, BUT THAT COULD HAVE BEEN TYPO. I NEED THE HEAD-PIPE DIA. MESUREMENT FROM THE XS BEFORE I GO AND CHECK THE BANDIT'S

[xschop]

x-over

so this should be the best overall system then? if the bandit's exhaust ports fit then I would have a 4-1 with x-over at 1,4 cyl.s and 2,3 cyls.....and 1200 cc.... I should be happy, altho I am not an exhaust expert, just lazy and don't want to clean pipes....