Mine got deeper. Also noticably louder. I like it. But I'm also an *******... Lol

 

as long as you adjust fueling to match you don't have to worry about it, i'm pretty sure that people who are shortening their exhaust aren't matching fuel though. bad news, +1 it will damage in the long run, -1 no one here can make an exhaust that will keep real power esp. via a shorty pipe. also, theres a reason aftermarket exhaust are the length they are, flow velocity and length of the system are extremely important for gettting max power using an effect similar to a 2-strokes scavenging.

 

I dont think that anoyingly loud exhausts "save lifes" Even with a stock exhaust at freeway speeds you can hear a sportbike. But that my .02

 

2002 and newer F4i's do not have carbs. It is a fuel injected system. Computer regulates fuel/air mixture. After cutting the Yosh RS3 I had a full tune-up done on it. They also installed a K&N filter.
The boys at JP Motorsports did an awsome job.

 

i have a 929 with a yosh rs3 can if i cut from the bottom end of the can at 8 in ,all i have to do is cut right ,no welding on the inside just rivet back together correct?

 

you could re-drill rivet holes and rivet the bottom back on, wouldn't recommend cutting from the bottom though. my v&h had a solid welded exhaust mount bracket, had to chop it off from the top.

i'm loving my exhaust, didn't chop off to much it looks perfect. packed it properly its a bit deeper toned and throatier, i'll take pictures and videos later.

 

ok i did this some time ago and thought id throw in a few pics and add to the "HOW TO"
Mine was a d&d can. i simply marked on the can the 6 inches i wanted to cut off, then used a chop/mitre saw with metal blade for a dead straight, easy cut. that bit took about 2 minutes after i had the can off the bike. heres a pic...


Then i had to remove the inner tube and wadding from inside. it all came out with a firm pull with grips/pliers.

and i was left with ....

then i used an angle grinder and ground the rivets down and pushed them through with a spike....

then the end tapped out!

the end just slotted back into the new shorter can, and i drilled and riveted back together.
I only took off 6 inches, have not noticed any performance either way and it definately looks and sounds a million times better! judge for your self with the next two pics....
before...

after....

 

nice work.
i did this with my carbon slip on, very easy job, looks much nicer with a small can.
it was shortened with 14cm

edit:

and now it has been shortened 3.5cm more at rear :P in total 17.5cm

 

Just did my exhaust and love it

 

Same here