My bike started making a weird noise; it sounds like a clatter coming from the area of the throttle body. It isn't overly loud; you hafta listen for it. It increases speed along with engine speed. It ONLY does it when I first start the bike when cold, & after about a minute or so, it disappears suddenly, and you do not hear it again until the next cold start. Doesn't do it with hot starts. It started right after I replaced the SE air filter element with a K&N element.

I'm wondering if the noise was always there, like an intake type noise or something, and now I can hear it since I installed the more free flowing K&N air filter. Anyone have an idea?

I have SE slip ons, SE A/C with K&N, race tuned, SE 254e cams. Bike is an '07 RKC with 9400 miles. Bike starts & runs well, with excellent power.

 

Put your old filter back on and see if the noise goes away.

 

Exactly what I was about to do!

OK; Just put old filter back on & waiting for the bike to cool down in the Florida heat.

 

How does it sound?

 

Just started cold & NO NOISE! I'm hoping that was it. Will test it again tomorrow. Still gonna go back to the K&N; don't mind the noise as long as I knw that's what it was.

 

Hmmm. Dickey, I think what we have here is a situation where you need to get one of those premium Japanese motor-sickles.

 

BITE YOUR TONGUE!!!!!!!!!!!!!!!!!!!!!! Never happen.

 

It sounds like reversion from your camshaft however that sound should always be present at certain engine rpm's and load (not just be present when starting cold).