How To: Build your own Exhaust!

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i put the second hand XB9R muffler on my bike last night. took me about 40 mins to swap over.

turned it on and sounds great big improvement on the stock one. but i noticed it takes a bit longer to start...

will ride it to work tomorrow morning and see if there is any difference.
 
Bike sounds good at 100km's riding down the highway.

i have noticed that at low revs its a bit sluggish but as soon as i hit 5000RMP it takes off like a rocket, feels like it accelerates a bit quicker than it did with my stock muffler.

When i installed the XB9R muffler i disconnected the exhaust valve cable and also disconnected it from the air box as XB9R muffler doesn't have a exhaust valve...

Will disconnecting the exhaust valve cable from the air box cause any issues?
 
Shouldn't give you any trouble. If you disconnected the electrical plug, your Check Engine light will come on. You can order a terminator for about $40US that will fix the check engine light.

Good luck, Glad you like it!

-Tim
 
I did notice a loss in torque on the way home from work.

takes longer to speed up when flooring it... and also can no longer do wheelies...

any idea's on what to do to fix this? or is this just a result of removing the baffle?

i might put my stock muffler back on if there isn't a fix for this issue.
 
I did notice a loss in torque on the way home from work.
Click to expand...
You can add fuel in the maps (or use Race ECM maps) to make up for some of the loss but will probably take a custom mapping or datalogging to get it up to optimum.
 
I just finished this mod up and did everything almost exactly like yours Urban. I just made a full end cap out of 14Ga steel for it instead of using the existing plate at the rear of the muffler. I was expecting a loss in torque but I dont think I did. I'm almost positive this thing runs better than it did before. In first gear almost anywhere in the rev range I just bounce the throttle and nail it and it climbs up in a wheelie. No clutch. It also almost really wants to in second too but I havent found the right spot, also no clutch. I didnt do a remap or even a tps reset.
 
Well, I have to admit i like the sound of harleys but not the deafening ugly sound of straight pipes so this is perfect for me. I love the sound, nice deep thump. and ive just noticed these bikes are very finicky. ive been wondering y but no 2 seam perfectly the same to me.
 
Well, I have to admit i like the sound of harleys but not the deafening ugly sound of straight pipes so this is perfect for me. I love the sound, nice deep thump. and ive just noticed these bikes are very finicky. ive been wondering y but no 2 seam perfectly the same to me.
Click to expand...
Yep, that's why data logging seems to be so important to our bikes. That's my next step, get some info logged and then get some help with the maps. I'd like to get some low end back (it's not too bad) and hopefully get rid of some of the popping on decel. A bit rich right now I'd say.
 
It would be great to know how much wool and how fine the mesh is. And how coarse the wool needs to be. or if any of this matters?
 
Coarse wool is better than fine. Fine tends to burn up when welding. I've used chopped fiberglass matting and steel wool. Glass is the way to go.
 
I used course stainless steel wool. I've also been wanting to say, i just forgot, i did do the internal part a little different. I wanted to take pics but forgot the camera when i went to a friends to weld it. I welded the valve permanently open and got rid of the cable. I also only cut out the center pipe but cut two slots in each outer pipe about 6 inches long and an inch wide. in my head this meant a little more back pressure then getting rid of them completely, and somewhat equal pressure in the large center chamber. then i welded the ends of the outer pipes to the end cap i made right where i welded on the tips. sorry its long and i may not of explained it well. but it worked great. like i said i still have the low end grunt and no map or tps reset.
 
I forgot but i think i just ordered a 4 in wide piece by about 5 or six feet then pulled it apart to spread it out inside
 
Got it off and opened up. The chamber on mine is 11 inches long. I have a xb9sx 2009. Also there was no throtle cable on mine. Really easy so far. Can't wait to get her done. Its rainy here and left the bike at work hope to finish on wed. Next day I work
 

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