ZX9R induction noise?

[WanaGo]

Hey,

Just had my bike serviced after being unused for 2 or so years.
Got a B Service done from TSS Motorcycles in Wellington. No issues at all with them, seem like a good crowd.

Had to get a new rear brake disc, they changed the plugs, the air filter (disintegrated when they cleaned it), balanced the carbs, adjusted the chain, accelerator etc etc. Whole bunch of things, and a WOF most importantly.

When I picked up the bike this afternoon and started her up, the induction noise was incredible - incredibly loud that is.
The only thing I can think of is the air filter change they did, the new one maybe being a higher flow/less restriction.

It is so loud now, I cant hear the exhaust over the induction noise.
Something doesnt seem right.

They put in a "HIFLO airfilter ZX9R" according to the parts list. $33.91
Apparently its a foam type which you oil etc.

Anyone experienced anything like this.
I am going to take the tank off and have a look in a few minutes, just to see if anything doesnt look right.
The guy doing the servicing said he noticed it too (bit hard not too!) but wasnt sure if it was like that to start with (it wasnt). He was adamint it all went back together correctly, so I can only attribute it to the new air filter.

Ideas?

Cheers
WanaGo

[spanner spinner]

pull the tank and check that the air box halves are sealing properly, the air filter on every bike acts as a muffler for the intake noise so the new filter might be a bit louder than the old one if it is a bit more free flowing. But as loud as you are discribing i would be looking for a air box leak.

[tigertim20]

in my experience, a bike with an airbox that isnt not bolted in correctly (i.e. has leaks) will have a loud induction noise, but also it will refuse to rev out to redline. if its not running noticeably rich or lean, and it revs out freely to redline, then its most likely just the new filter.
If your old filter 'literally fell to bits' then there were probably bits of if blocking up the airflow before you took it in, restricting airflow further

[WanaGo]

Cheers

Yeah took the tank off - well, swung it out of the way, and had a quick look and the halves looked in place correctly.

I will take the tank right off on the weekend and have a decent look, and take the halves apart and check they were sealed etc.

Yeah the guy said it fell apart when he went to clean it. I dont believe I have changed it in the 7 years I have owned it, but I may be wrong. I do remember cleaning and re-oiling it, but that was some time ago... or was that my old bike... hmm. Well overdue anyway.

Just put in new rear pads that I purchased and forgot to give TSS, and cleaned out the clutch switch which was intermittant and wouldnt let me start sometimes - all is good as now.

Will ride to work tomorrow.

Cheers

[hayd3n]

i looves me induction noise!!
its great

[WanaGo]

Agreed, but what I have now is rediculously loud.
Standing next to the bike when its idling, you cannot hear the exhaust over the induction noise.
Riding now I pretty much will need ear plugs - or take a concrete pill and 'get hard' - ha.
Actually sounds like your head is inside the engine, you can hear every pip and fart the engine makes.

No problem with induction noise in general, love it too, but what I have just doesnt seem right for some reason.

Time will tell :)

[hayd3n]

Agreed, but what I have now is rediculously loud.
Standing next to the bike when its idling, you cannot hear the exhaust over the induction noise.
Riding now I pretty much will need ear plugs - or take a concrete pill and 'get hard' - ha.
Actually sounds like your head is inside the engine, you can hear every pip and fart the engine makes.

No problem with induction noise in general, love it too, but what I have just doesnt seem right for some reason.

Time will tell :)

understandable,
go for a decent spin and see if you notice any performance difference

[WanaGo]

Havent riden it for over 2 years, so dont really have a fresh comparison sadly.
Didnt ride it before TSS came and picked it up either. Only started it up and changed the fluids etc. Was quiet(er) then.

But yes, a good ride is in order.

[Edbear]

A ZX9R should be ridden and enjoyed as much and as often as possible! A true classic and still one of the fastest road bikes! What model is it and do you have pics you can post? :niceone:

[Edbear]

Thanks for the red, imdying. I see you are still up to your childish ways...

[WanaGo]

Hey.

Yep she still goes well, just under 50,000km on the clock.

Its a 1996 ZX9R B4

The way it rides now is like it has a lumpy cam in it, after the service etc. Interesting. Good fun to ride.

Few pics from 2005 after I got her repainted. Previous owners changed the colour a few times, was the standard Kawasaki Green and Purple, and then went to Blue, and then to Black - and then I got it repainted Black again as the job was pretty naff.
No plastic under the seat also, one of the previous owners stripped all that out and now has nicely folded aluminium plate under there. I am assuming its standard engine wise, but who knows.

259766
259765
259767
259768

[ducatilover]

If it's revving the whole way out happily with no loss in power, then it's the filter.
If the airbox is sealed up, check the ram air tubes, but you'll know if there's a leak in one of 'em, won't rev past 4k or so.

I would say it's the filter and you should change it more:lol:

[Coldrider]

Still have my ZX9 C1 (1 owner) in the shed somewhere, no induction noise at idle, growls nastily with throttle 3/4 to full open, with appropriate vibration.
That's why I never sold it. Has original foam/felt filter.

[Fast Eddie]

my 2 cents, I had the h1 zxr750, with a k&n filter fitted etc the induction noise was incredible even at er, well over the speedlimit where the most u hear is windnoise i could still hear the induction noise eh.

it didnt run like it had a lumpy cam tho lol..

check for air leaks all round, airbox to carbs etc.. she'll be right. I like a bit of induction, maybe ur exhaust is too quiet

[White trash]

You wanna ride the new model GSXR750 then. Fuck my brown goat if it's not the god damned loudest induction noise ever.

[Fast Eddie]

You wanna ride the new model GSXR750 then..

yea I do..

what sorta hp at the wheel u recon one makes wt?

[ducatilover]

yea I do..

what sorta hp at the wheel u recon one makes wt?
130 on a Dynojet and 23.4 on a very-accurate-coz-they-said FactoryPro is my guess.

[Drew]

130 on a Dynojet and 23.4 on a very-accurate-coz-they-said FactoryPro is my guess.So, my superbike with 187 ponies at the tread, on Ray Clee's 'factory pro' is quite good then?

[Fast Eddie]

So, my superbike with 187 ponies at the tread, on Ray Clee's 'factory pro' is quite good then?

haha yea, what is it?

and 130 for the 750 is meaan, i had the blade on a dodgy dyno recently and it made 130 at the wheel on a tyre that was shit and spun a little. the same dyno did provide an accurate reading for friends tl1000 which he had dyno'd elsewhere at a more reputable shop so im gonna take it haha!

[ducatilover]

So, my superbike with 187 ponies at the tread, on Ray Clee's 'factory pro' is quite good then?
That'd be 456 dynojet HP, so not bad at all!

[Drew]

haha yea, what is it?

and 130 for the 750 is meaan, i had the blade on a dodgy dyno recently and it made 130 at the wheel on a tyre that was shit and spun a little. the same dyno did provide an accurate reading for friends tl1000 which he had dyno'd elsewhere at a more reputable shop so im gonna take it haha!

This, http://www.trademe.co.nz/motors/motorbikes/motorbikes/sports/auction-454586233.htm

I'm not the guy selling it, it's my ex missus. But you could probably own it around $5,000. Has been registered before and comes with Suzuki loom to make the toughest street fighter you've ever seen.

K5/6 gixxer thou. Reportedly cost Haldane 80k to build, and has more Yoshimura bits in it than the catalogue.

You know someone is serous, when the ballast/plenum on the oil breather, and the sump, are yoshimura genuine.

[Fast Eddie]

This, http://www.trademe.co.nz/motors/motorbikes/motorbikes/sports/auction-454586233.htm

I'm not the guy selling it, it's my ex missus. But you could probably own it around $5,000. Has been registered before and comes with Suzuki loom to make the toughest street fighter you've ever seen.

K5/6 gixxer thou. Reportedly cost Haldane 80k to build, and has more Yoshimura bits in it than the catalogue.

You know someone is serous, when the ballast/plenum on the oil breather, and the sump, are yoshimura genuine.

pretty gnarly at 6,500 starting price eh! I'm already paying off a sidecar tho so no fund for that. pretty cool if its at 187 ponies too, someone will get a sweet toy

[Edbear]

Looks like the childish imdying has a childish friend in tigertim20. Small things please small minds and I guess these two have about the smallest minds on KB. Have fun little children... :yes:

[ducatilover]

This, http://www.trademe.co.nz/motors/motorbikes/motorbikes/sports/auction-454586233.htm

I'm not the guy selling it, it's my ex missus. But you could probably own it around $5,000. Has been registered before and comes with Suzuki loom to make the toughest street fighter you've ever seen.

K5/6 gixxer thou. Reportedly cost Haldane 80k to build, and has more Yoshimura bits in it than the catalogue.

You know someone is serous, when the ballast/plenum on the oil breather, and the sump, are yoshimura genuine.
That could be a sweet little scoot. :shifty:

[Drew]

Looks like the childish imdying has a childish friend in tigertim20. Small things please small minds and I guess these two have about the smallest minds on KB. Have fun little children... :yes:

I'm still trying to figure out what you said that was red bling worthy in the first place. Did you edit it after or summat?

[Drew]

That could be a sweet little scoot. :shifty:And then some. I've never ridden anything that required so much finessing, and animalism at the same time. Chuck it at a turn like it's your bitch, but don't try to exit with the same mentality or you'll end up jumping it over the back fence on the long track at Manfield, and spend the next hour trying to shoo the cows away and dig it out of the mud.:facepalm:

[Edbear]

I'm still trying to figure out what you said that was red bling worthy in the first place. Did you edit it after or summat?

Nah, Imdying decided he was going to red bling every post I made. If he wants to act like a child I guess I can't stop him.

[DEATH_INC.]

And then some. I've never ridden anything that required so much finessing, :
Fark yeh, that thing is MENTAL! By far the maddest non-turbo bike I've ridden. I'd love to own it if someone wants to buy me a prezzie :)

As for the 9, it's prolly just the filter. My 12 with a b&m filter made more intake noise than exhaust noise, even with the Kerker on it. And those older kwakkas were world renowned for their induction noise. It'll also be the running issue, any hi-flo filter will require re-jetting to suit....

[tigertim20]

Looks like the childish imdying has a childish friend in tigertim20. Small things please small minds and I guess these two have about the smallest minds on KB. Have fun little children... :yes:

.............................259888

[DrunkenMistake]

Thanks for the red, imdying. I see you are still up to your childish ways...

259889
10char

[Edbear]

Perhaps the mods may want to look at the fact that, while I couldn't care less about their silliness, all they are really doing is ruining the legitimate threads of other members with off-topic idiocy. Not really fair for the OP, is it?

[DrunkenMistake]

Perhaps the mods may want to look at the fact that, while I couldn't care less about their silliness, all they are really doing is ruining the legitimate threads of other members with off-topic idiocy. Not really fair for the OP, is it?

Didnt you mention someone red repping you in a thread about ZX9R induction noise?... Ahh never mind you're right, your never off topic.

[tigertim20]

Perhaps the mods may want to look at the fact that, while I couldn't care less about their silliness, all they are really doing is ruining the legitimate threads of other members with off-topic idiocy. Not really fair for the OP, is it?
Oh really? hmm, lets peruse this thread eh?:innocent:


A ZX9R should be ridden and enjoyed as much and as often as possible! A true classic and still one of the fastest road bikes! What model is it and do you have pics you can post? :niceone:
hardly helpful to the OP is it? wank wank I want to post so people notice me even though I have fuckall constructive to add:shifty:


Thanks for the red, imdying. I see you are still up to your childish ways...
dragging the thread totally off topic:facepalm:


Looks like the childish imdying has a childish friend in tigertim20. Small things please small minds and I guess these two have about the smallest minds on KB. Have fun little children... :yes:
and drags it even further odd topic:shit:


Nah, Imdying decided he was going to red bling every post I made. If he wants to act like a child I guess I can't stop him.
decides that it is necessary to give a running commentary on your emotional fragility as it pertains to your internet communications with little to no consideration to how unhelpful it is to the poor poor OP, who just so desperately needs help and cannot possibly survive even the slightest deviation from the topic . . :confused:

How about you just fuck off and worship your zombie jesus sky pixie you hypocritical fucking cultist.:bash:

[Coldrider]

Didnt you mention someone red repping you in a thread about ZX9R induction noise?... Ahh never mind you're right, your never off topic.What did you contribute?

[Edbear]

Didnt you mention someone red repping you in a thread about ZX9R induction noise?... Ahh never mind you're right, your never off topic.

You are right of course, I received the red rep for a legitamate post about the thread topic on this thread and while I could have started another thread or posted in my own "repping" thread I thought other members should know who the idiots are.

So I do apologise to the OP.


What did you contribute?

Shhh... They think they are fine upstanding members with an enormous library of relevant information to contribute. Pointing out the fallacy of this may damage their ego's.

Maybe we can all get back on topic now and give the OP a nicer time here.

[Edbear]

What did you contribute?

I must correct my post it was mainly aimed at tigertim20

[schrodingers cat]

A good little trick for finding air leak is to have the bike idling and spray a bit of brakeclean at the area of the suspected leak. If the idle speed changes you've found it.

[DEATH_INC.]

A good little trick for finding air leak is to have the bike idling and spray a bit of brakeclean at the area of the suspected leak. If the idle speed changes you've found it.
Yep, or engine start works too, but remember they are flammable 259921

And it won't work on the airbox, only between the throttle blades and engine...

[schrodingers cat]

Yep, or engine start works too, but remember they are flammable 259921

And it won't work on the airbox, only between the throttle blades and engine...

If you restrict (choke) the intake and open the butterflies to achieve vacuum in the airbox then it does...


But good point and worthy of pointing out.

[Pussy]

I'm still trying to figure out what you said that was red bling worthy in the first place. Did you edit it after or summat?

It might be something to do with him having a loud and uninformed narcissistic opinion on everything, as well as ramming his joho views and his batteries down everyone's throats.

[WanaGo]

As for the 9, it's prolly just the filter. My 12 with a b&m filter made more intake noise than exhaust noise, even with the Kerker on it. And those older kwakkas were world renowned for their induction noise. It'll also be the running issue, any hi-flo filter will require re-jetting to suit....

Yeah just got back from a weekend away on it. Did about 200km round trip.
Its running pretty rough. The induction noise is loud but it has settled down a little bit, but the bike is running pretty rough. Its sort of a mixture between a rotary and a twin in sound, and down low its not very smooth at all. When you open it up, its a bit of a case of 'Hang on!', but down low is quite jerky. Trying to go slow through busy towns, like 30km/h type thing, is interesting. Lumpy cam mixed with poor tune type thing. Really stange, never experienced it on the bike before.
Maybe it does need re-jetting...
Annoying as it wasnt like this prior to the service, it was smooth as.
Almost sounds like its running on 3, but then the power is there, so it cant be.

Weird.
Might give them a call tomorrow.

[ducatilover]

If it's a very low revs you might get away with pilot screw adjustment, if it's below 7000rpm raising the needles will do it.
Unless they've synced 'em wrong or set the floats wrong

[WanaGo]

Aside from that though, at about 80km/h there is a 'shimmering' sort of sqeal/whine sound, really quite loud. Doesnt matter what gear you are in really, or if on load or off load, its present. Not sure what it is, maybe a bearing in the gearbox or something?
Doesnt seem to change with revs/gear, I noticed it in the top 3 gears anyway, and all from about 78-85km/h. Above that it goes away. Not the sound of brakes or anything, more sounds like a bearing at a guess.

Any ideas?

[mossy1200]

Aside from that though, at about 80km/h there is a 'shimmering' sort of sqeal/whine sound, really quite loud. Doesnt matter what gear you are in really, or if on load or off load, its present. Not sure what it is, maybe a bearing in the gearbox or something?
Doesnt seem to change with revs/gear, I noticed it in the top 3 gears anyway, and all from about 78-85km/h. Above that it goes away. Not the sound of brakes or anything, more sounds like a bearing at a guess.

Any ideas?

im picking whine is from chain being to tight maybe with a stretched point loading up from sprocket bearing(if the wheel has been adjusted).
Check the chain at several points of rear wheel turn and not just one place.

Im picking new filter is letting bike run lean.Block off some of the intake side of the filter with rag to confirm if power returns low down.
Idd say you will need needle lift to bring the air fuel mixture back.Carb slide prob staying low then lift suddenly when the revs build giving you a 2 stroke feeling power band.

[WanaGo]

Thanks guys.

Will investigate the carb adjustments, thanks.
Yes its all under 7000rpm. Over 7000rpm it has tons of power and felt relatively normal. It feels gruntier at the high end, but rubbish down low.
They did a carb balance at the service, and said it was a little way off, but nothing major. Assume though that what is required isnt covered under the B Service.

The whine sound has been like that for quite some time, before the service - so its not related to that. I should have said.
The chain was looser than it is now, they adjusted it at the service. It was doing this sound before it went in. I dont know if it would be the chain....

Thanks

[Coldrider]

The original front sprocket has a rubber backing on it, to reduce vibration/resonance, the chain could be eating into the rubber, or the rear cush drive rubber blocks could be disintegrating, that makes a sqealing sound. If the rear cush drive rubbers are worn you should be able to rotate the sprocket back and forth. It is easy to take the tank off and open up and remove the airbox, remount and check for leaks. There is bit of antipollution plumbing around airbox with a filter/valve etc so you may need a manual to check it all out.

[Drew]

I'm just spit balling here, but do you happen to have a new helmet since you rode the bike last time?

The symptoms you're describing, are pretty vague. Other than the rough running, I think the lads at TSS will be happy to look into that.

[jonbuoy]

Might be worth checking a bung or screw is not missing or loose from the vacuum ports on the carbs if they did a balance. probably not but its worth a quick look.

[AllanB]

Keep it simple. The easiest solution would be to pop a stock Kawasaki filter in and see how she runs - if the noise and performance returns to normal then the new filter is the cause. Sure they can be expensive but so is workshop time if you take it back to the shop to sort.


There is always the horrible thought that the shop warmed up the bike to change the oil before swapping out the old air filter and the engine sucked in chunks of stuffed filter into the carbs.

[Coldrider]

There is always the horrible thought that the shop warmed up the bike to change the oil before swapping out the old air filter and the engine sucked in chunks of stuffed filter into the carbs.The original filter clamps onto a wire gauze, so can't get sucked in.