What's that noise??

[user 8898]

I love my 98 Vmax and the Kerker 4-1 sounds bad as hell. But it has a rattle that I can't seem to put my finger on when I rev it that seems to be coming from the exhaust. I mostly notice it when the engine is decelerating, but that could be because it's not making as much noise at the time. Anyway, I repacked the baffle, no help. Sounds like there's a piece of metal rattling inside the exhaust.

Anyone have any thoughts on the origin of the noise?

Thanks!

Walker

 

[Sonoran6]

License plate or rear fender inner fender rattle maybe? My plate rattles on decel occasionally

 

[44boyd]

Windscreen?

 

[user 8898]

I'm pretty sure it's coming from the exhaust itself. Didn't know if anyone else maybe had a Kerker come apart inside somehow or other. Probably have to pull the muffler off... maybe there's something inside... sure sounds like it.

 

[44boyd]

Pull the muffler and see if it does it.

 

[jethrobolas]

Maybe a loose/bad gasket where the pipe meets the head? Hole or crack in the collector?

 

[RaWarrior]

I got an exhaust rattle when one of the holeshot cans had slipped out of the header....one of them didn't fit all that great and only overlapped like 1/2" and unless the clamp was on super tight it tended to eventually pop out, then rattle against the headpipe.

 

[swrsmik]

Check the bracket where kerker bolts to bike.I've had two different style kerkers,the one I have now has a flat style cap & if you get slop between it & tube inside,might rattle.plus if its loud,harmonics could make something near it rattle like fender like someone mentioned.

 

[wildweasel_pt]

Clamps? Exhaust gaskets? Loose bolt? Centerstand?

 

[95spfldmax]

This prob isn't your problem......but when I have my stainless steel Supertrapps on the carbon build-up would occasionally release from the wall and rattle around in there until you take off the ends and fire up the bike to shoot them out.......:confused2:

 

[user 8898]

Thanks for all the input. I'll just have to do some disassembling and see what I have.

I know I can rule out the center stand - it was removed by a previous owner. I assume it was required in order to install the Kerker system.

 

[Fire-medic]

Thanks for all the input. I'll just have to do some disassembling and see what I have.

I know I can rule out the center stand - it was removed by a previous owner. I assume it was required in order to install the Kerker system.

Check-out your cut/bent centerstand bolts' mounting loops. Maybe it's 'phantom-bracket noise?' :biglaugh: