tin can sound

hey guys, i just acquired a power core 4 and installed it. when i ride or rev the bike i get a weird tinny sound kinda reminds me of a kazzoo or like if you held a piece of tin foil in front of the exhaust. any ideas what it could be ? it is very noticeable without the spark arrestor in and only slightly noticeable with it in

thanks in advance
Luke

Brand new PC4, or used?

Stock header?

Did you get/use the transition piece properly from header to pipe?

If used, it might be needing a replacement of the packing inside muffler.

(just my initial thoughts)

My pc4 for had a buzz to it, especially wot... just before i changed the packing. Now is has a nice tight, clear tone.

it is used, i have the stock head pipe, sounds like it needs re packed

check this thread <-- what it might look like inside....

whoa haha that looked pretty messed up. i guess i could always open her up and see what it looks like on the inside. the seller seems to think the sound is caused by not using enough silicone when i installed it so im going to check that as well

mollett89 wrote:

whoa haha that looked pretty messed up. i guess i could always open her up and see what it looks like on the inside. the seller seems to think the sound is caused by not using enough silicone when i installed it so im going to check that as well

I used no silicone, or any sealant at all when I installed my FmF Q4 onto my stock header.

No strange tin can sound here.

I've had the pipe apart and too, did not use sealant (pc4 + powerbomb). I did use sealant on the muffler when I repacked it.

I expected to see this link posted when I saw the title :

http://acidcow.com/video/36360-hilarious_sportbike_imitation.html

that video is pretty funny...the sad thing is the buzzing that that can makes is exactly how my exhaust sounds :( i tried to take a video but it wont really catch the true sound on my phone