Squeak coming through the exhaust. I’m at a loss

[1 B.M.F.]

Earplugs help or iPod. Or put your bike on jack tie it down really well. Back tire off ground, spin wheel without motor running. No squeak. Crank bike. Twist throttle in neutral. No squeak. Put in gear twist throttle. I sound like Sven. Good luck.

 

[Jersey Big Mike]

Coming from the right side by the exhaust output

Have you checked you belt guard?

 

[Twistedspoke100]

I think Sven is right. I think it’s the harmonics of the engine causing it. Took it to the shop and they said they have had a few bikes do it. Baffles or that lollipop bolt trick of Sven’s is the only thing that can be done. I ordered a baffle from RnB, I’ll post an update after installation.

 

[speedball jr.]

I think Sven is right. I think it’s the harmonics of the engine causing it. Took it to the shop and they said they have had a few bikes do it. Baffles or that lollipop bolt trick of Sven’s is the only thing that can be done. I ordered a baffle from RnB, I’ll post an update after installation.

Is Your Zipper up when this happens?

 

[mleach72]

I may have an answer to this "chirping" sound. I also may have answer to the great mystery of the purpose of the fiber washers under the coil cover. I just replaced the spark plug wires on my bike. It's a lot easier to change the plug wires if you remove the coil cover from the engine. After I did this and put everything back together, I noticed I was getting a chirping sound much like the OP. I couldn't figure out what it was. Then it hit me. I forgot to put the fiber washers back in. I took it apart and put the washers back in. Chirp has now disappeared. Maybe that is the purpose of those mysterious fiber washers.

 

[Twistedspoke100]

I may have an answer to this "chirping" sound. I also may have answer to the great mystery of the purpose of the fiber washers under the coil cover. I just replaced the spark plug wires on my bike. It's a lot easier to change the plug wires if you remove the coil cover from the engine. After I did this and put everything back together, I noticed I was getting a chirping sound much like the OP. I couldn't figure out what it was. Then it hit me. I forgot to put the fiber washers back in. I took it apart and put the washers back in. Chirp has now disappeared. Maybe that is the purpose of those mysterious fiber washers.

Strange! I will look to see if they are in there. I have pretty much have given up on the chirp. I have tried torque cones, they made it go away almost completely but at the cost of 10 HP so they were taken out.

 

[mleach72]

Strange! I will look to see if they are in there. I have pretty much have given up on the chirp. I have tried torque cones, they made it go away almost completely but at the cost of 10 HP so they were taken out.

I know you just had some engine work done by John. You may want to ask whoever put your engine together if they remember putting the fiber washers in. It may save you some trouble. Unfortunately for us guys with the prostreet bikes, removing the coil cover requires removing the tank. For you and me, just the left side tank.

 

[Twistedspoke100]

I know you just had some engine work done by John. You may want to ask whoever put your engine together if they remember putting the fiber washers in. It may save you some trouble. Unfortunately for us guys with the prostreet bikes, removing the coil cover requires removing the tank. For you and me, just the left side tank.

I had the coil cover off myself a couple a weeks ago because of a snapped top mount bolt. I did forget to put them in, luckily I caught it before I put the tank back on but now I am wondering if I put them on the right side of the coil? I will be posting a update about the final build! Bike performs better than anticipated.

 

[Twistedspoke100]

I will say I went up 2 jet sizes after the final Dyno and the squeak now almost entirely goes away when its hot. Its still there but very minor. I have spoke to a few techs now that have said they have heard this before, but have know idea what to do to make it go away. One guy said he used torque cones and that did work pretty good but killed the performance.

 

[2004BDDt]

I have a chirp when letting off in gear. Sounds like steel to steel. I have tightened the two front motor mounts on the bottom and the two from the heads to the frame. I only used a 3/8 rachet; should I tighten more? Thanks

 

[chubs]

I don't know what the torque specs are on the top mount, but don't go by that old rule of "tighten it till it strips, then back it off 1/2 turn".

 

[blacktopper]

One of my K9's chirped when I started it. It was a head gasket leaking.

 

[2004BDDt]

One of my K9's chirped when I started it. It was a head gasket leaking.

It only does it when I let off in gear. Nothing on acceleration, just slowing down in gear. Any thoughts? Thanks

 

[HMAN]

Take a chunk of bar soap and rub the inside and outside EDGE of ur belt. See if this stops ur chirp.

 

[2004BDDt]

Take a chunk of bar soap and rub the inside and outside EDGE of ur belt. See if this stops ur chirp.

I will do it. Thanks

 

[2004BDDt]

I will do it. Thanks

The Primary belt, right?

 

[Mickmorris]

The Primary belt, right?

Drive belt. Do you have a open primary on the bike?