The strangest of noises

[the bear zxr]

Hi guys, yes, I'm one of those irritating people who join in order to tap the wealth of knowledge available.... so here goes:

In the last few weeks, approaching a month, my 1989 ZXR250a has developed a "clicking noise" which sounds suspiciously and worryingly like it may be gearbox related... now I DO have a second engine which i am blue-printing and tuning... but it is not quite street ready and there's no way in hell im "finishing" it half assed. so i need this click gone for the moment...

Ok; the background:
It is relative to road speed- the faster I go, the faster it gets,
It is also relative to gear selection- the closer to first, the closer to my racing heart when I hear it!!!
It occurs when the clutch is in or out,
It occurs when the engine is not running..

It does NOT occur when in neutral.


So, for all you gurus out there, come forth and help my poor, undersized baby!

Cheers,
Bryn

[Rhys]

Tight spot on the chain ?

Push the bike forward with the motor off and in neutral

[Mom]

Seized link in your chain.

[mossy1200]

Front sprocket final bearing. Check maybe you don't have the chain tight or a stretched spot in it. Often its a result of the chain being to tight by previous owners of smaller bikes due to lack of maintenance knowledge.

After that your internals. Possible a piece of clutch plate, fibre or basket but stops in neutral indicates sprocket bearing under load. Any oil loss around sprocket finer than chain oil?

[the bear zxr]

Hi guys,
Talk about a swift response,

It can't be chain related; it did it with the knackered chain, and now with a two day old one. next step is to look at sprocket... but I asked the shop after they put the chain on (no garage in centre city so eeeeverything is shop done :/ ) whether theyd seen any undue wear on the front sprocket and thy said nope...

Also, i should mention it is not one "click" per chain rotation, nor does it have a relationship with the tooth position (as in if you marked a tooth, the click would occur with the tooth in different positions each time)

[mossy1200]

Hi guys,
Talk about a swift response,

It can't be chain related; it did it with the knackered chain, and now with a two day old one. next step is to look at sprocket... but I asked the shop after they put the chain on (no garage in centre city so eeeeverything is shop done :/ ) whether theyd seen any undue wear on the front sprocket and thy said nope...

Also, i should mention it is not one "click" per chain rotation, nor does it have a relationship with the tooth position (as in if you marked a tooth, the click would occur with the tooth in different positions each time)

Going from knackered chain to new chain adjusted by shop its looking even more likely final drive bearing. You can bring it to my place and ill have a look.

[the bear zxr]

Front sprocket final bearing. Check maybe you don't have the chain tight or a stretched spot in it. Often its a result of the chain being to tight by previous owners of smaller bikes due to lack of maintenance knowledge.

After that your internals. Possible a piece of clutch plate, fibre or basket but stops in neutral indicates sprocket bearing under load. Any oil loss around sprocket finer than chain oil?

I'm certain it's internal, the clutch iiis totally shagged (previous owner never opened up (you should have seen the carbon!!!!!) so when I got it the (origonal factory I might add (on a 48,000!!) clutch kind of packed a sad) so thats being replaced next week. Im just trying to cover all angles and get lots of ideas so when I have it apart, I know what to look for...

I've never had this on any other bike before, so it's a shame that it had to happen on my "project bike!!!

Cheers

[Rhys]

the clutch iiis totally shagged (previous owner never opened up (you should have seen the carbon!!!!!) so when I got it the (origonal factory I might add (on a 48,000!!) clutch kind of packed a sad) so thats being replaced next week.

Cheers

zxr's have a wet clutch so should be no carbon

[the bear zxr]

zxr's have a wet clutch so should be no carbon

Sorry I don't follow? If you mean carbon as I stated in a previous post: that was just a reference to how "un-gunned" the bike had been; the carbon was in the piston/valve array...

If I found carbon in my clutch... i think the only response would be to cry and wonder how the hell it got there

[Zrex]

If it happens in one gear only, then you have stripped a tooth off that gear.

[the bear zxr]

If it happens in one gear only, then you have stripped a tooth off that gear.

definately in all gears... As Mossy1200 said, it's starting to sound more and more like a final drive bearing has shat its pants... does anybody know how long this may last before terminal failure, and what sort of damage could i be doing to my gearsets in the mean time...? I really can't be bothered with a complete teardown of the "commuter" engine, when the new one is so close to completion.... but then again; i want top keep two engines- not totally root the current one out of neglect

[Katman]

Ok; the background:
It is relative to road speed- the faster I go, the faster it gets,
It is also relative to gear selection- the closer to first, the closer to my racing heart when I hear it!!!
It occurs when the clutch is in or out,
It occurs when the engine is not running..

It does NOT occur when in neutral.

So it only happens when the motor is in gear?

How have you determined that it happens in gear while the engine is not running?

[the bear zxr]

So it only happens when the motor is in gear?

How have you determined that it happens in gear while the engine is not running?

As in the first post, yes, it occurs in all gears, when the engine is running or not, whether the clutch is engaged or not

[G4L4XY]

Hi guys, yes, I'm one of those irritating people who join in order to tap the wealth of knowledge available.... so here goes:

In the last few weeks, approaching a month, my 1989 ZXR250a has developed a "clicking noise" which sounds suspiciously and worryingly like it may be gearbox related... now I DO have a second engine which i am blue-printing and tuning... but it is not quite street ready and there's no way in hell im "finishing" it half assed. so i need this click gone for the moment...

Ok; the background:
It is relative to road speed- the faster I go, the faster it gets,
It is also relative to gear selection- the closer to first, the closer to my racing heart when I hear it!!!
It occurs when the clutch is in or out,
It occurs when the engine is not running..

It does NOT occur when in neutral.


So, for all you gurus out there, come forth and help my poor, undersized baby!

Cheers,
Bryn

How does it not occur when it's running if it also occurs when running lol

[the bear zxr]

How does it not occur when it's running if it also occurs when running lol

because it clearly has nothing to do with the engine itself.. only the gearbox... whether the engine is running or not makes no difference to what parts move when the bike is rolling