shortening the silencer

[skinrider440]

what does shortening the silencer do to the bike and how do you do it. I have a pro circuit T4.

It will give you more lowend power and increase the sound by 30% probably.... I used a hacksaw on mine..:D Here's a pic of mine cut. I planned on cuttin off about 3 to 4 inches but when it was said and done I trimmed off 6 inches...which was more than i wanted but it's too late now..:eek:

[skinrider440]

which end do you cut off (pipe side) and what do i do about the screws do i have to tap some new threads

[YZROOSTINYA]

the cut the exit side, not where it meets the header, and you have to drill new holes for the rivets, not mods ahould be made to the endcap, but you will have to shorten the screen

[skinrider440]

what are the downsides of shortening it? Except for being louder. will it make it run cooler

[UglyMotha™]

here is my e-series I shortend it by 4 or 5" I dont' remember that's luvmyex's quad he owns the pipe now now but i really didn't notice much more of a low-end gain if any it was very little it did increase the sound quite a bit but the main reason i did it was cause the dang thing stuck out beyond the grab bar and no it won't run any cooler as for downsides there really arn't any besides it's louder

http://www.exriders.com/vbb/attachment.php?s=&postid=395969

[Sparks425Ex]

I geuss Rico covered pretty much everything I was gonna say. I also Shortened my Bills. Mine is about an 1 inch or 2 longer than Ricos. I used a hack saw on the exit side of the pipe. Then re drilled the holes and stuck the bolts back in. The sound increase was pretty big and the low end power was great. The top end didn't suffer liek I thought it would tho. The bottom end turned out great. You also have to cut the insert screen that follows through the hole pipe. I also removed my screen spark arrester. I really could care less weather sparks are flying out my pipe. Even tho the spark arrester doesn't stop much flow it does stop some. Every little bit counts.

[nacs400ex]

So if i were to cut my silencer, i wouldnt cut the header side i would cut the end cap side. to do do this i have to drill out the rivets, cut it down, drill holes, and then rivet it back it???. I only have my stock pipe and the white bros. i think i am going to do this when I get my LRD. Also Rico, what kind of silencer is that ? If it wouldnt be too much trouble to ask, could somebody kinda do a step my step instruction. Maybe this should go into reviews?? It would be kinda helpful for people who want to do it.


Also, whats up with the screen thing ??
Thanks a ton

Craig

[DantheEXman]

I want to know how to do this too.... I just need to know what to cut it with...(Hack Saw)??? And what did you do about the screw holes for the bolts for the end cap? Thanks

[jb400exxx]

if you wanna short pipe, just sell what you have and get a TC Racing pipe, it's a 4 inch supertrapp.

[DantheEXman]

i like my WB... I just thought it would be differnt and the whole thing about the grab bar... Iv gotten turf in my pipe many a times lol.

[jb400exxx]

i wish my T-4 was about 2 inches shorter but i'm not gonna try to cut it and end up ruining it. and it really doesn't need to be any louder either.

[DantheEXman]

Someone should post all the steps in detail though for others to see... maybe ill get board one day and cut it up.

[Mity Mo]

Ill give you the steps for doing this. I did it on my WB R-4 pipe.
1. Remove silencer from bike.
2. Check to see if your end cap is screwed on or riveted on. In my case they were rivets.
3. Either drill rivets out or unscrew end cap.
4. Carefully pull silencer core out of muffler.
5. Unwrap any material that is left on silencer core.
6. Determine on the muffler how much you want to remove. I chose 4.5" on the R-4.
7. I used a cut off saw. But you may use a hack saw if thats all you have. Be sure to maintain a nice flat end. Easiest way of obtaining this is take a rubber band and place it where you are gonna make your cut. Then with a tape measure be sure to have the rubber band at the same measurement at 4 places around tube.
8. Then take marker and follow around rubber band. This will ensure a nice flat edge.
9. Take a round file and take off the burred edges being extremely careful not to cut yourself.
10. Now take silencer core and place inside of muffler tube.
11. Determine how much you need by placing it all together on a bench and for the most part eye up and mark where you should cut the silencer core to fit.
12. Most cores are spot welded on the core tube. Using a file or cut off wheel cut the welds holding it together. Be sure not to damage the end as it will be needed to mate the core and muffler later.
13. To cut the core tube your best bet is to use a cut off wheel. Unless you have very steady hands for the hacksaw. You do not want to crush the core tube screen.
14. Place core tube on end you cut off in step12.
15. Place silencer core in muffler to check for proper fit. Trim off more if necessary to get a good fit.
16. Once you have the fit you are looking for pop rivet teh end back on the silencer core tube.
17. Recheck fit to ensure no mistakes were made.
18. Now use new muffler wrap to insulate silencer tube. I like the thicker tighter material. Usually a little more expensive but I think it works the best. Be sure to wrap silncer tube tight and make it about a 1/3rd larger than the muffler opening.
19. Place silencer core and tube back in muffler. Be sure to get all material in the muffler as it may burn if let out while riding. I dont have to remind you what part of your body will burn first if it ignites......
20. Place end cap onto muffler and be sure to have the tip of silencer aimed at the ground or slightly to the outer part of quad.
21. Carefully drill holes through both being sure not too put to much pressure as you may dent the silencer.
22. Pop rivet holes one at a time. Meaning drill a hole and then pop rivet that hole. That way you dont risk making the holes crooked.
23. Replace silencer on headpipe and check for fit.
24. There might be a good possibility you may have to rejet. So be sure to check plug and mood of bike before you go nuts with it.
25. Go for a nice ride in the knowledge that you did it on your own and might of helped tick off your neighbors with the little bit of noise it created.

Good luck. Mo
;)

[YZROOSTINYA]

some of you guys need to read ALL the posts before posting, each step has been covered like 3 times and yet you still ask.

just take some time and read the post a few times if your confused.