Gen 2 busa Ticking at idle/ Backfiring on release of throttle.

[AndysBusa]

Just bought a 2011 hayabusa with 6k miles. it ticks at idle goes away with acceleration if my rpms are high enough it backfires a bunch on release of throttle. this bike has ebay shorty pipes directly under the bike any ideas? it honestly makes me not even want to ride it because i dont have the money to really fix it if it explodes. thanks guys.

 

[ottafish]

Ticks at idle... I'd be checking the clutch bolts

 

[Kiwi Rider]

Put up a short video of the bike running if you can, so we can get a better idea of the actual tone of the ticking.

 

[Bumblebee]

Welcome....

Yes just like @Kiwi Rider said, diagnosing something like that is a real challenge over the internet.

If I were to take a guess I'd say it could be an exhaust leak depending on what it sounds like. The old adage of look, listen and feel comes into play. Try to listen to where the noise is coming from...you can use a screwdriver as a sort of stethoscope to pin point the source....

As for the pop on decel-a pretty common thing with aftermarket pipes and even more so with short ones like that...there is a mod you can do (use the search function) with a marble that will stop this.

 

[Hayabusa Wannabe]

Welcome to the forum @AndysBusa.

 

[Kiwi Rider]

Welcome along to the forum @AndysBusa!

 

[AndysBusa]

Ticks at idle... I'd be checking the clutch bolts

Put up a short video of the bike running if you can, so we can get a better idea of the actual tone of the ticking.

Welcome....

Yes just like @Kiwi Rider said, diagnosing something like that is a real challenge over the internet.

If I were to take a guess I'd say it could be an exhaust leak depending on what it sounds like. The old adage of look, listen and feel comes into play. Try to listen to where the noise is coming from...you can use a screwdriver as a sort of stethoscope to pin point the source....

As for the pop on decel-a pretty common thing with aftermarket pipes and even more so with short ones like that...there is a mod you can do (use the search function) with a marble that will stop this.

 

[Bumblebee]

It sounds like an exhaust leak to me..

If it was the clutch bolts contacting the case, it would be more of a metal on metal sound.

 

[Bumblebee]

The good thing is going into the clutch is an easy thing to do and one I'd check off the box regardless...

It's advised to take the clutch pack bolts out, lock-tite them just for peace of mind...mine backed out last season...it was relatively quick and painless to do the procedure.

I picked up a new gasket even though others have had success using the old one.

 

[AndysBusa]

would i hear it if i did screwdriver trick against clutch case it sounds smooth. my pipe headers look kinda sketchy bolts arent even and kinda warped/bent.

 

[sixpack577]

The good thing is going into the clutch is an easy thing to do and one I'd check off the box regardless...

It's advised to take the clutch pack bolts out, lock-tite them just for peace of mind...mine backed out last season...it was relatively quick and painless to do the procedure.

I picked up a new gasket even though others have had success using the old one.

+1
and you can do it on the kickstand without draining the oil.

 

[sixpack577]

would i hear it if i did screwdriver trick against clutch case it sounds smooth. my pipe headers look kinda sketchy bolts arent even and kinda warped/bent.

That would go along with what @Bumblebee said about and exhaust leak, which I agree is what it sounds like.
Unless it makes some awful noise when you rev it, that's where I'de start.

 

[Bumblebee]

That would go along with what @Bumblebee said about and exhaust leak, which I agree is what it sounds like.
Unless it makes some awful noise when you rev it, that's where I'de start.

Yep....that would be my guess...if it was the clutch bolts getting loose, you'd hear them very clearly....they make an awful sound....

 

[HayaWakened]

Pull the shorty slip-on off the bike and run it that way. Cuz I think it's (exhaust leak) at the slip-on. Does the ticking reduce/disappear once the bike warms up to op temp?

 

[AndysBusa]

Pull the shorty slip-on off the bike and run it that way. Cuz I think it's (exhaust leak) at the slip-on. Does the ticking reduce/disappear once the bike warms up to op temp?

ive tried that still sounds the same. sadly.

 

[Dnyce]

Worse case scenario, cam chain loose/valves need adjustment.

Best case-exhaust bolts loose. Check all the bolts, check the clutch as mentioned, check the valve clearance. Not too hard just needs a $5 tool and takes alil while.

 

[mjl3truck]

Plug the hose for the PAIR valve

How-to Gen II Marble Modification with pictures | Busa Mods

Here's another how-to thread with pictures on the "marble modification" to a Gen II Busa. I just did this yesterday and no more exhaust popping/backfire on deceleration.

www.hayabusa.org