Chopped exhaust can?

[hawkhan]

I see pictures here and there of exhaust cans that seemed to have been chopped, and I was wondering if this was an easy task to take on myself. If anyone has done this or know someone who has, I wanted to know if it changes the sound, performance, and/or carbs? Will it hurt, help, or do neither to my ride? I am just curious.

Thank you

Yusef Khan

[Roberto]

Do you mean Supertrapp style exhaust cans? They are manufacured this way, not cut.

Example on my bike...



Catalogue available here:
http://www.supertrapp.com/images/pdfs/st-catalog.pdf[/img]

[ghandi1616]

I have a D&D can for a cbr600 that I cut down to about 10" in length. It is a pretty simple task. Drill out all of the rivets, pull the outer sleeve off, cut off the glass pack, grind off the welds from the mesh baffle and figure out how long you want it. Then cut the outer body and inside mesh baffle to the length you want to have. Weld the mesh baffle back in, slide the body on and re-rivet it all back together. As for the sound, oh yeah quite loud (I now drown out the sound of my brothers Harley). I did a massive overhaul this winter and changed my jetting, went to Uni-Pods and now have an open exhaust. Way more power as well. I will post some pics of my bike when time and camera permits.

[MrDude_1]

when i chopped my can, it was pretty simple.

drill out the rivets, slide the internals out...

cut the can square (staying square is what i would call the hardest part)

cut the internal tube to match the new can length.

re-wrap/pack it...
mark all the new rivet holes, drill, and pop-rivet...


when i did it, i was wishing i had a chopsaw so i could stay square easier.... but it wasnt that hard.. alum cuts easily with a hacksaw.
i just used masking tape to make my straight line around it.... it gave me a good visual indicator if i was going crooked with the saw.

[hawkhan]

Yeah i have an M4 and i wanted to chop it. Thanks for the insight guys.

[Ross]

Make sure you use stainless rivets, otherwise they'll rust pretty fast.

[MrDude_1]

Make sure you use stainless rivets, otherwise they'll rust pretty fast.

or aluminum.

[gred11]

ghandi you said yours was much louder after the chop? Did you pack the can after chopping it? I want to get rid of the giant stock collector box but keep the stock can. But I wonder if the bike is going to be annoying loud.

[Doc]

I have a 2 brothers I chopped. It is very loud.

[SMF]

chopped my m4 in 1/2 (literally). it's definitely louder and it also likes to blow packing out now (repacked it twice since).

[MrDude_1]

chopped my m4 in 1/2 (literally). it's definitely louder and it also likes to blow packing out now (repacked it twice since).

what packing are you using?

im using the mat style offroad stuff... im thinking of repacking it with the fluffier bagged stuff to try and quiet it down some.. lol

(im sure there are names for this stuff, i just dont know it.)

[SMF]

first time i packed it i used the fluffier stuff. currently have the off-road matt stuff in there. when i do it again i'll likely try the fluffy stuff again. kinda annoying.

[Doc]

Mine seems to be holding up fine.

[hawkhan]

where do you buy the packing material?

[gred11]

I haven't looked at my can yet but is it welded or riveted shut? I really want to make the bike as quiet as possible but yet ditch the middle collector. Any suggestions?