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Eliminated Exhaust Crossover

RPWIII

RPWIII

Just got it firing!
Joined
Oct 30, 2017
Messages
21
Location
Spokane, WA
This is a 2000 Jackal.
I know this is not virgin territory, and may not even be wise, but I removed the exhaust crossover tank because it has a completely parted, broken weld, and I wanted a little more "exhaust note". I moved the mufflers forward to attach to the down pipes and made new mounts on the frame to support the mufflers.
As I was doing this I thought, "This is just too easy and good looking to have not been done before". And the sound is much better! I know that the mixture will need to be touched up. It seems to be running a bit rich. I am considering a Power Commander install. Good Idea or just throwing money away? Any information that has been learned by those who have tried this, or similar adventures, is welcome.
 
You do lose some performance by eliminating the cross over but I don't know that you will ever notice it from the butt dyno.
Some folks have moved the X-over to the front.

Not sure about the PC on a Jackal but a throttle body sync & TPS reset does wonders.
 
Why not replace the big "colostomy bag" you removed with an "H" crossover? One doesn't cost all that much and would be a good idea in my opinion.
 
Actually, I was waiting to hear from you. The fix was intended to keep the bike running till the middle of Oct (if we are lucky up here). This winter I will definitely get a H cross over from you, and a power commander. I have drilled stock muff's and may need to know the options to replace them.
By the way I opened up the C Bag to see what they put in there. Pretty bizarre.
 
Ahh Todd, I listened to you! I was going to go as inexpensive as possible but in the end decided to do it all. My '07 CalVin runs so sweet, stonger everywhere but especially off the line. Even my wife noticed! Great job.
 
mkstewed said:
Ahh Todd, I listened to you! I was going to go as inexpensive as possible but in the end decided to do it all. My '07 CalVin runs so sweet, stonger everywhere but especially off the line. Even my wife noticed! Great job.
Click to expand...
Thanks Mike, makes all my efforts, expense and exhaustive R&D seem worth it on these rare occasions.
 
Well, I received the "H' crossover and installed it. Nice fab job! It was so pretty I considered hanging on the shop wall instead of on the bike. We are on the edge of losing our indian summer but I did get it out for about 40 miles. Runs pretty much like before with the colostomy bag but with much more exhaust note. Still has some lean areas at low speed if just cruising or on a downgrade.(Which it did before also) Otherwise it's good for now. Lesson to be learned here is to NOT remove the crossover pipe on any Vee designed engine. (I actually read this somewhere lately but I'm not sure I totally understand it's relevance to Vee designs). My Harley did not have the stock exhaust or crossover pipe and while it ran sweet in the low and midrange, I never could get much out of the top end. So there ya go....
 
I just wanted to come back to this thread and wrap it up. I had the H Crossover installed last fall and put in one of "Todd's" programmed Power Commanders this spring. Before I could try this all out on the road, I had to pull the tank off because of a corn-ball repair made to a stripped thread on the Fuel Pressure Regulator. They had clamped a hose to the regulator's threaded area and the threaded tank bung. It leaked all over the motor and the shop floor. Well to get at all of that I removed the seat, tank and then that "beautiful" air-cleaner. (What a piece of work!) That thing must expand after it is pressed into the frame! Anyway, I was not going to put that back in, so it now has a crankcase filter and bigger oval pod filters installed. So I hit the road and not only does the bike have a lot more kick but is sooo smooth. And the sound is Sweet! The package really seems to work. It will be a real nice ride this summer. That is if I just get it to charge the battery, but that's another story.
 
I have a 2001 Stone and went through the same evolution a few years back.
I fitted one of Todd's crossover pipes and drilled the mufflers before cutting the top off the air filter box and installing a K&N filter. This was followed by a Power Commander with the appropriate fuelling map.
I was reasonably happy with the arrangement but after reading his article on tuning the Cali and looking at his dyno test results it was obvious that the real gains would only be realised by replacing the mufflers with quality performance items.
I finally installed a pair of Lafranconi Competitzione and changed the fuel map of the Power Commander to suit.
I can unreservedly confirm Todd's findings when in his article he said "Where did all that extra power come from?"
Through the mid range there is such a difference that I no longer need to downshift to accelerate, just crack the throttle and enjoy the rush!
Several people have complained about the noise of the pipes after installing them. If you start it up in your workshop and rev the engine it is loud but with light throttle on open roads it's fine. When you do turn it on there is a satisfying growl that many enjoy and it is nowhere near as offensive as many Harleys running on open pipes!
Thanks to Todd for making the information and equipment available to us all.
 
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