one more :-) - whinning gears

[stryker]

While my bike is coasting, IE gears driving the engine, there is a bit of a gearbox whine. Now while I'd not bat an eyelid if I were in an old school VW Beetle at the time it does make me wonder if this is normal on a bike?

Its a '94 FZR600.

[stryker]

So no ideas? It mostly happens when letting off the power in gears 1, 2 and 3.

[Kickstart]

Hi

My FZR does it as well (and so does the FZ750 and the Bimota, but they are both the larger 5 valve engines).

That does not really worry me too much.

Does yours vibrate loads around 4000rpm?

All the best

Keith
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[stevo123]

my old 89 tzr250 was a whining bastard as well. Was louder than the exhaust in 1st 2nd and 3rd. Never changed while i had the bike and no probs with it either. Long as you change the oil as per service schedule(or a bit less) Should be okay

[stryker]

Kickstart, I have a little high frequency vibration, however I only know this owing to having pins and needles and sore wrists sometimes. However while you cant help but feel some vibration from the throbbing beast I cant really say it specifically vibrates at any given revs.

Kickstart, do you find you have a bit of a flat-spot when sub 2-3k revs? I'm just trying to work out if its worth the money having me carbs cleaned. As it is I typically have the engine around 4.5k revs in what ever gear I'm in for the given speed (this keeps it happy). Sometimes if my speed reduces and I'm on/around 3k revs the engine seems to not know if it wants to drive the wheels or be driven..... get what I mean?

[Kickstart]

Hi

Not really noticed any specific flat spot, but then I am assuming that it has little low down power (4 stroke wise I am used to rather more torquey bikes, and other bikes used to ones I rev the nuts off).

Yes the vibration sends my fingers to sleep as well. Just at around 4000 there is some quite harsh vibration, mainly noticeable through the footrests.

All the best

Keith
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[Big Pete]

thereis more gear noise on bikes because they are (usually)straight cut (spur) gears. Car boxes often have helical gears which run quieter.
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[stryker]

Pete, I see. Hmm guess it especially noticable with a 10yr old bike with 10yr old engineering processes.

Hey kickstart, you in the west midlands? Either way I'd hope to run into you at a pub or somewhere one day, I could pick your brains clean!

Right now on my FZR I don't even know which way is reserve on the fuel tap..... well not till I next run out, then its too late to find out

Guess I'll have to buy a haynes.

[Kickstart]

Hi

The Haynes covers the FZR600, 750 and 1000 so is fairly generic.

The reserve tap is when the pointy part of the fuel switch is pointing up, and it is on the normal tank when the pointy bit points down (this seems illogical to me).

I live just outside Stafford.

All the best

Keith
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[stryker]

Well, your guess is better than mine so I'll go with that, thanks

[BLOFLY 636]

yes most bikes have a straight cut primary gear drive which will cause the whining noise I seem to notice mine at about 5500rpm in 6th gear just coasting along at the same speed and I actually enjoy the sound have you ever heard the late model VFR 750's they have straight cut gear driven camshafts which sound very nice so I don't think it is anything to worry about mate
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Those bloody footpegs......they ought to do away with em!

[stryker]

I've memories of the original VW beetle, my grandad had one.

Now hearing my bike making the same noise is very confusing

I'm still trying to work out how to check the gear oil level on my bike

EDIT: no hang on, he had an old moggy, now this is confusing

[Demonic69]

Since I changed the graing on the Blade when under power it sounds like a car does when it's reversing
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Back on a Blade. Just feels so right.

[Kickstart]

[Demonic69]

Only does it under power though Keith?
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Back on a Blade. Just feels so right.

[stryker]

Kickstart, you saying the oil put in the engine also travels through the gears and clutch?

Man, I'll never get into this bike mechanics, its too weird. I had to wear clean gloves when I did the clutch on my reliant trike

[Kickstart]

[stryker]

O......M.......G!

But, all that rubbish off the clutch plates and gears, in the engine!

Well you learn something new every day.

[jonboy]

^^Yes i've always wondered how it doesn't end up knackering the engine having bits of clutch plate floating around.

Also, on all my bikes, first gear has always made a much louder whining noise than the other 5, which weren't really noticeable.
Any reason for this - straight cut gear on first only?

[Wave2k]

my Rs125 sounded like a rally gearbox just before it broke
be carefull, it might be telling you 'nooooo im dying stop riding meee'
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Ducati 1299 Panigale
2009 Corvette C6 z51
RS125->CBR400->RXS100->GSXR750K2->Ducati749S->CBR600RR5->TL1000R->DRz400->RSVR1000->Honda VTR SP1->CBR400->GSXR1000K6->Honda H100->CBR600RR3->Ducati1299

[Rory]

[Kickstart]

Hi

Clutch plates do not loose that much material, and there is the oil filter to catch what it does loose. However the oil filter will eventually block up, so the oil will bypass it. One more reason to change your oil and filter on a regular basis (and quite easy to do on the FZR).

All the best

Keith
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