Time for a new clutch

[The Grey One]

I have noticed some clutch slip at high revs, no problem if I ride like an old fart but slips when I forget that's what I am and play with the sports bikes!

I have checked that the lever does not catch on the handguard, checked the fluid level etc. I have just removed the starter motor and there is no sign of oil contamination of any kind. So it looks like a new clutch is required. I will fit a complete clutch kit but is there anything else I should replace while I am in there? All suggestions gratefully received, I would also like to strip out my alarm (Datatool 3) There is no need of such a device here so the auto arming is just a pain. Anyone done this?

John

 

[DrFarkoff]

Strip the front off the starter and clean out all the dust and grime

Once you take the front nose cone off you nip the heads of the 2 small rivets and tap the steel centre plate off complete with the reduction gearbox thingy and clean that out make sure the grease plate isn't loose and liable to fall off and short the armature coils

Clean the plunger of the solenoid but do not grease in there and don't use wd or anything in here either

The one way gear on the shaft needs a good cleaning and a wee taste (i.e. less than half a tea spoon of 2 stroke oil worked in helps in that bit)

I've had a couple like that this past while

An hour of cleaning and lubricating makes all the difference to the load on the battery when starting

I'll try and remember to take some pics next time Silly me I just did a mini overhaul on one today

 

[Kenny Rodkiss]

Think John is wondering about fitting a new clutch not overhaul his starter motor

 

[The Grey One]

Think John is wondering about fitting a new clutch not overhaul his starter motor

I'm OK with stripping the beast down to replace the clutch although I wish it had lasted a few more weeks. We have 6 weeks left before I put the bike away for winter and next spring would be a good time to do the job.

The starter motor check is a good idea having seen threads on here about failures.

If anyone knows of anything else please say so.

John

 

[DrFarkoff]

Yup I got that okay he was asking what else was worth doing and that definitely is worth doing

Think John is wondering about fitting a new clutch not overhaul his starter motor

 

[The Grey One]

So where do I find the release bearing? As far as I can see it does not come in the clutch kit. The kits appear (apart from the crazy prices) to be very like car clutches have changed hundreds of car clutches and always used a clutch kit that included the bearing. I can't find the bearing mentioned by the major parts suppliers-is it only from BMW? Can someone help an old man out!

John

 

[Welshman]

So where do I find the release bearing? As far as I can see it does not come in the clutch kit. The kits appear (apart from the crazy prices) to be very like car clutches have changed hundreds of car clutches and always used a clutch kit that included the bearing. I can't find the bearing mentioned by the major parts suppliers-is it only from BMW? Can someone help an old man out!

John

it is built into the slave cylinder, non replaceable

 

[The Grey One]

it is built into the slave cylinder, non replaceable

Thanks for that, I will see if I can get the thing out to check the bearing. I think it has been said on here that you can get it out without major dismantling.

Bike parts are silly money here in Austria so I want to order all the required parts in from the UK before I start the job.

John

 

[The Grey One]

Yes it's the clutch

Had a few hours spare today - I forgot it was a public holiday here so could not do things I had planned so stripped the bike down. Result one very badly contaminated clutch. It looks like cluch fluid has travelled down the push rod and onto the plate. Must have been doing this for a while by the looks of things. So do I need a new slave cylinder-push rod or anything else to prevent further trouble? I will fit a complete new clutch, it's too much work to risk doing half the job!

Putting it all back together will probably have to wait until next spring so there is plenty of time for you lot to give helpful suggestions.

John

 

[Steptoe]

. It looks like cluch fluid has travelled down the push rod and onto the plate. Must have been doing this for a while by the looks of things. So do I need a new slave cylinder-push rod or anything else to prevent further trouble?

You need to replace the very small gearbox output shaft seal at the slave cylinder end of the shaft .
It lets the gearbox oil past, into the recess between the slave cylinder and the pushrod tunnel and once it's level with the pushrod tunnel it migrates along onto the clutch

It's difficult to see but it is in there, hidden away

 

[The Grey One]

You need to replace the very small gearbox output shaft seal at the slave cylinder end of the shaft .
It lets the gearbox oil past, into the recess between the slave cylinder and the pushrod tunnel and once it's level with the pushrod tunnel it migrates along onto the clutch

It's difficult to see but it is in there, hidden away

Thanks a lot Steptoe, I will get one ordered along with the clutch. Was this the fluid that I saw when I took out thr slave cylinder. I thought it was hydrauic fluid leaking but the fluid level had not noticably dropped.

John