XJ600S clutch stuff

[Grumbleweed]

I've been a bit random in where my posts on my clutch problems have been posted so I'm going to tidy things up.

After my thrust bearing ate itself I have got a new bearing, plate washer, pull rod (the shaft got a bit chewed up this time) and clutch cable (all genuine Yamaha parts from Fowlers).
I've rebuilt the clutch after greasing the bearing (it's too damn dry in the area where it lives - a totally cr@p design). Before commiting to fully bolting the side casing on I set up the clutch cable and its clamp to check that the spring-back of the clutch is strong enough to make the clutch lever "park". Well it's not. The return spring was replaced a few months ago along with the last bearing (which, obviously, didn't last very long at all).

The shaft and bearings have been lub'ed and appear to be in reasonable condition (* there is a fair amount of slack in the fit between the top bearing and the shaft but I don't know if this is to be expected).
The shaft rotates without feeling grotty, but it just seems to have a smidgen too much resistance (the oil seal appears to add some drag to the rotation but it is a seal so it should rub a bit).

Can anyone tell me if the shaft should be totally free and easy or is a bit of stiffness usual?
I think the new bearing will last no time if the thrust bearing assembly doesn't back away from the pressure plate without me pushing the clutch lever the last few mm back to its park position after each gear change.

Sorry for the long post....

Graham.

Edit: * When assembled the release pivot shaft doesn't float around at all - what I meant was that if I put the shaft in upside down so that the top bearing is running on the mating part of the shaft it isn't a tight fit at all.

[bobh]

The spring should definitely return the shaft all the way back. I can't remember exactly whether you can adjust this, but is it possible that you don't have enough pretension on the spring?

In any case, the shaft should turn freely in the bearings (between finger and thumb on the splined bit, without the arm fitted, if that makes sense), with only a little extra friction from the seal. If it's tighter than this, do a bit of checking to find out where the friction is coming from, e.g. check that the shaft is straight and true, try it in the top bearing only (upside down) etc.

A small amount of radial play (maybe 5 thou in old money) at the top of the shaft is normal, but not so much that it will stretch the seal and allow water in.

[Grumbleweed]

Jul 16, 2010 21:52:56 GMT bobh said:

The spring should definitely return the shaft all the way back. I can't remember exactly whether you can adjust this, but is it possible that you don't have enough pretension on the spring?

In any case, the shaft should turn freely in the bearings (between finger and thumb on the splined bit, without the arm fitted, if that makes sense), with only a little extra friction from the seal. If it's tighter than this, do a bit of checking to find out where the friction is coming from, e.g. check that the shaft is straight and true, try it in the top bearing only (upside down) etc.

A small amount of radial play (maybe 5 thou in old money) at the top of the shaft is normal, but not so much that it will stretch the seal and allow water in.

I just modified my post to explain about the updown shaft check and then read your post!
There is hardly any free play in the assembled shaft and the spring is new and set up with as much pretension as the cable's adjusters will allow.
I need to feel another divi's shaft to judge the amount of stiffness that works ok.

Thanks for your reply.

Graham

[Grumbleweed]

While I'm having a cry...
How much fun is it trying to get circlip pliers in this day and age? I'd managed to get the release pivot shaft and the oil pump drive wheel circlips off by bodging but I couldn't bodge the oil pump one back on. I went bloomin everywhere to buy a pair with no luck .
I gave up trying to use the right thing and took a file to some dinky scissors .

Graham.

[Grumbleweed]

I found a cure:

[m40man]

Jul 24, 2010 18:52:23 GMT Grumbleweed said:

I found a cure:

Radical, but effective . Enjoy .

[newell]

Yes, that will sort it!

[Grumbleweed]

Cheers guys!
Running in sucks (6000 rpm!!!) but even so I can tell a world of difference between the 2001 model and this one in terms of power waiting to be unleashed . It doesn't have the kind of looks and personality only its mother would love either! Saying that I always liked my old one when the clutch behaved itself .

Graham.

[Grumbleweed]

[glow=red,2,300][/glow]I just found my old bike on ebay:

Yamaha XJ600S Diversion

2001 "Y" plate
Just 21000 miles from new.

Absolutley Cherished by just 1 owner from new
Extensive service history
MOT Until 15th July 2011
All Previous MOT's

Tax Until 31st December 2010
Exhaust replaced with stainless steel Nexxus item.

Very Good Condition - The best old Diversion we have seen in years.
This machine is a european import - speedo converter fitted from new.
Bid early and grab yourself a bargain.




I had to laugh after the cool response I got at the dealer when I chopped it in!

Graham.