Strange sound after wheelie in 1. gear. Need help

Mikkel67 · May 28, 2010, 11:17:20 AM

Hi.

after wheelies in 1 (On my s4r w full zard exhaust, PC3 and k&n open air filter). a strange sound emerges. It sounds like something is broken, and it sounds like it comes from the engine. when i drive after the wheelie the sound continues. It is hard to describe the sound, but the sound gives the impression that the bike is not running correctly. At the same time i don`t think it actually affect the performance of the bike. If i twist the throttle for a minute it goes back to normal again. If i wheelie in any other gear the sound does not appare. And the sound never comes from regular driving. The sound feels very wrong, but at the same time, how can it be somethin serious if it goes away after a minute or so. anyway, i hope some of you guys know what this might be?

Thanks

Slide Panda · May 28, 2010, 11:31:21 AM

Do you notice any white smoke after this?

It's not unheard of for some oil to exit the crank case breather when a duc wheelies. Do it enough and you'll get some that's going back into the air box via the crank breather system

Mikkel67 · May 28, 2010, 11:54:03 AM

Okay, what does that mean? It is no danger? This sound does not occure if i drive fast without wheelie in 1. I have not noticed any smoke..

hackers2r · May 28, 2010, 12:42:52 PM

Well one way to get rid of the noise is to stop doing wheelies. Just saying.

DarkStaR · May 28, 2010, 04:14:23 PM

Quote from: hackers2r on May 28, 2010, 12:42:52 PM
Well one way to get rid of the noise is to stop doing wheelies. Just saying.

What fun is that?

Scotzman · May 28, 2010, 05:12:43 PM

Quote from: hackers2r on May 28, 2010, 12:42:52 PM
Well one way to get rid of the noise is to stop doing wheelies. Just saying.

Just not in first

hackers2r · May 29, 2010, 03:43:58 AM

^True that

Mikkel67 · May 29, 2010, 07:58:21 AM

The dealer told me that it is the zard exhaust that is leakin a bit and makes the sound. Good news. A little exhaust paste should do the trick

hackers2r · May 29, 2010, 10:24:02 AM

Uh...aren't you the same guy who said you used exhaust paste already? In the thread about the exhaust "shooting?" I'm kinda confused?

Mikkel67 · May 30, 2010, 04:50:44 AM

hehe, yes. That is true. But the zard exhaust consist of several parts that apparently need past to sit firmly together. I only used it on the last to parts... So no i have to open these again to be able to do the front pars as well..

hackers2r · May 30, 2010, 05:01:15 AM

After looking at how the Zard exhaust is setup, here is my suggestion: Check the gaskets from the small OEM header pipes to the zard header. The Zard, like many other setups, is a slip fit system. These types of systems are *usually* a pretty snug fit, not much room for paste and leaks. The issues you're probably experiencing with the noise and shooting/backfiring are probably coming from one of the gaskets immediately after the short OEM header pipes. It could be installed incorrectly or need replacing. Save the money for the exhaust paste and check those gaskets.

ducpainter · May 30, 2010, 05:03:19 AM

Those gaskets were a weak spot with the OEM system as well.

Mikkel67 · May 30, 2010, 07:31:27 AM

Quote from: hackers2r on May 30, 2010, 05:01:15 AM
After looking at how the Zard exhaust is setup, here is my suggestion: Check the gaskets from the small OEM header pipes to the zard header. The Zard, like many other setups, is a slip fit system. These types of systems are *usually* a pretty snug fit, not much room for paste and leaks. The issues you're probably experiencing with the noise and shooting/backfiring are probably coming from one of the gaskets immediately after the short OEM header pipes. It could be installed incorrectly or need replacing. Save the money for the exhaust paste and check those gaskets.

Yes, i also believe that it is not a good and tight fit between the OEM header pipes and the zards. I don`t think there is any gaskets there? I got some type of gasket with the zards, but since the pipes are whole i(not cut) it will not work to tighten the gasket around the pipes...

hackers2r · May 30, 2010, 12:00:14 PM

Check out this picture:

In that picture, part "33," the gasket, slides over the header, part "2." Then your Zard header pipe, the pipe on the left-hand side, slides over both the gasket and the header. Part "33" is what you need to check and if there isn't one there, there needs to be on both the horizontal and vertical cylinders.

Mikkel67 · May 31, 2010, 03:48:19 AM

Thanks a lot for this information. I don`t have this gasket. It is missing from my original exhaust.. The local dealer does not have it in the store. Is it a spesial part? will i find something that works at a local hardwere store?

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Strange sound after wheelie in 1. gear. Need help