fjr1300 - noises

On Jul 28, 2:08 pm, "Albrecht via MotorcycleKB.com" <u33665@uwe>
wrote:

> Does the sound quiet down when you pull the clutch lever in? That's a noisy
> clutch basket. There has to be *some* play between the clutch basket and the
> other parts, or you wouldn't be able to disengage the engine from the
> transmission.


There's no easy way to test that -- the klunk noise happens once or
twice while the engine is sitting in neutral warming up 9first thirty
seconds after start). I will try sitting on the bike with the clutch
engaged for a few days and listen for the noise, maybe that will test
for this?

I do expect some noise when shifting gears, but when it's in neutral,
should the play in the clutch basket be audible?
 >> Stay informed about: fjr1300 - noises 

defretted wrote:

>There's no easy way to test that -- the klunk noise happens once or
>twice while the engine is sitting in neutral warming up 9first thirty
>seconds after start).

Clutch baskets will get noisy as the miles accumulate. It's normal for the
big nut that secures the center hub to the main shaft to get loose, the
bushing inside the
clutch basket wears, and the whole clutch assembly flops around on the
mainshaft. Also, there are shock absorbing springs in the clutch basket that
rattle around.

>I will try sitting on the bike with the clutch
>engaged for a few days and listen for the noise, maybe that will test
>for this?

Riders tend to notice clutch basket noise when the engine is warmed up. So
listen for strange sounds then, and pull the clutch in.

You might also be hearing the crankshaft counterbalancers, or the compensator
cams on the middrive shaft, or even the idler gear in the starter clutch.

You could also be hearing one of the upper gear pairs clunking. There are no
bearings in any gear except 2nd.

The thing about motorcycle engines is that they are not in a sound proofed
engine compartment and the rider can hear all the little mechanical bits
whirring and whizzing and clunking.

And, since most riders have no idea of just how crude motorcycle drive trains
are, they are mystified by the noises.

Drawings of some of the noisy bits:

http://www.bikebandit.com/partsbandit/showschematic.asp?dept_id=850577

http://www.bikebandit.com/partsbandit/showschematic.asp?dept_id=850625

http://www.bikebandit.com/partsbandit/showschematic.asp?dept_id=850575

http://www.bikebandit.com/partsbandit/showschematic.asp?dept_id=850549




>
>I do expect some noise when shifting gears, but when it's in neutral,
>should the play in the clutch basket be audible?

--
Message posted via MotorcycleKB.com
http://www.motorcyclekb.com/Uwe/Forums.aspx/yamaha/200707/1
 >> Stay informed about: fjr1300 - noises