Clutch problem , slipping

[Filmcamera]

Check out the Chris Harris video on a spline lube - that bike has the old two part puck and bushing.

[SJK]

You were asked about the existence of that bushing in a previous post. We still don't know if it has one. Remove the rod and take a photo from the swing arm side.

Please put the year of your bike in your profile so it will show up in every post. That way respondents will know exactly what is being repaired and won't need to backtrack.

Call a dealer and ask them the length of the clutch rod they would supply.

Just did that, called BMW apparently Max BMX is talking about a busing on the Pushrod(is not on mine already) and not modifying the piston/puck as I understood form Filmcamera

I will take a picture without the Pushrod now

I have posted a picture of the Pushrod in the beginning of this discussion  ., next to a measuring tape for size comparison(253mm)

[Motorhobo]

You were asked about the existence of that bushing in a previous post. We still don't know if it has one. Remove the rod and take a photo from the swing arm side.

Please put the year of your bike in your profile so it will show up in every post. That way respondents will know exactly what is being repaired and won't need to backtrack.

Call a dealer and ask them the length of the clutch rod they would supply.

Actually, he did say there was no bushing in an earlier post and that it was the once piece puck/piston, did he not? At least that was what I understood.

He also measured the rod and crosschecked that with the dealer -- so it's possible the dealer is misinformed about the different rod with the one-piece piston. It's confusing. Let me go measure the clutch housing depth and take a pic of the rear of the gearbox with the rod protruding. I'll also measure the pushrod -- if I can find it! I know it's in some box somewhere.

[SJK]

Remove the rod and take a photo from the swing arm

Here is the picture you asked for and there is some earlier photo in the discussion showing the piston puck slide in without restriction from that side.

[SJK]

thank you sir :euro

[Motorhobo]

Here is the clutch housing measurement, and a wide-angle shot so you can see where I measured from.


I couldn't find that extra pushrod to measure...I know it's somewhere but I don't have time to search for it today. If someone else has one to measure and knows where it is, that'd be great.

[SJK]

Here is the clutch housing measurement, and a wide-angle shot so you can see where I measured from.

thanks a mill, so mine is the same 1'' ,rules that out. I will keep on hunting

[Motorhobo]

I'm out of ideas -- that pushrod sure looks the same at the rear end. Are you sure you have a 2 valve K transmission? Apparently a K1100 trans will fit on a 2 valve Kbike. You'll have to google around to find out more about that.

[SJK]

I'm out of ideas -- that pushrod sure looks the same at the rear end. Are you sure you have a 2 valve K transmission? Apparently a K1100 trans will fit on a 2 valve Kbike. You'll have to google around to find out more about that.

It would not surprise me if it is the wrong gearbox, but its the one I got it with it :dunno2:

[SJK]

Can someone please measure there K75 1989 Clutch Pushrod(23 13 1 454 786), but needs to be working with the upgraded throw out bearing replacement piston/Puck(23 13 1 464 167)


I'm attaching the sizes I need please


A
B
C
D

[Motorhobo]

Before you do anything else, confirm that you have a clutch pushrod seal installed in the rear end of the transmission. That part is #18 on this diagram:




http://store.bobsbmw.com/microfiche/DisplayImage.aspx?Size=Full&Type=Z&ImageID=3084


The clutch pushrod seal part #2312 1451024 serves two purposes. First, it prevents gear oil from traveling from the gearbox to the clutch bell housing via the pushrod. Second, it serves as a pilot bearing for centering the pushrod in the rear end of the shaft bore. If it's not there, well, I don't know what happens if it's not there but the rod probably won't be centered and might not get seated in the bearing at the front face of the puck/piston. If the rod tip isn't seated in that bearing it might just press up against the front face of the puck//piston and prevent the puck/piston from retracting into the bore the way it should.


Everything you want to know about the clutch pushrod seal is here:


http://www.motobrick.com/index.php/topic,5183.msg31947.html#msg31947


I hope that's it -- you might have a hard time convincing folks to disassemble their bikes to measure the pushrod for you  :2thumbup:   Not everyone has an extra bike fully dissembled lying around. Most people that do wouldn't be able to find the pushrod in one of those boxes, just like I can't. But if this doesn't solve it let me know and I will go find the thing and we can figure out what's going on.


I'll bet you're missing that clutch pushrod seal!




BTW if you are and have to get a new one, get two. They're a bitch to get in. Read the above thread thoroughly before you decide how many to order!

[Filmcamera]

I can attest to that having just done mine! They are a total pain to get out and nearly as bad to get in...


Order two for sure if yours is missing.


Having said that I think I can see yours in one of the pictures you posted looking down to see if the bushing is still there

[Motorhobo]

Crap -- I think I see it too. Well, let's hope, cause I have no desire to go looking for that damned pushrod in all those boxes...

[Laitch]

The seal is visible in one of SJK's recent photos. Gryph already supplied measurements of a clutch push rod and they conform to SJK's push rod's overall dimension.


SJK: Please post a photo of the adjusting bolt and its protrusion from the end of the clutch lever.

[SJK]

Gryph already supplied measurements of a clutch push rod and they conform to SJK's push rod's overall dimension.

SJK: Please post a photo of the adjusting bolt and its protrusion from the end of the clutch lever.

-Correct but I'm suspicious of size #C on my drawing , that info I did not confirm with Gryphon

-just to clarify are you asking for a photo of the rear clutch arm and adjusting bolt , its not installed on the gearbox at the moment , do you need to see it in position?
 

[SJK]

Could a worn or close to done Clutch friction disk push the Pushrod back like that????

I read this somewhere

[Laitch]

Could a worn or close to done Clutch friction disk push the Pushrod back like that????
I read this somewhere

Post a photo of the clutch arm adjusting bolt so we can see how it protrudes from the clutch arm.

[Laitch]

. . . do you need to see it in position?

No. I just want to see it before I die.

[The Mighty Gryphon]

I've been on hiatus while the electric company restored power to the Manor House. 

Dimension "c" is 7mm.

I have an old transmission of unknown vintage out in the garage.  Let me find the parts in question so I can post a photo  and some dimensions.

[SJK]

No. I just want to see it before I die.

Hope you still alive  :yes

[SJK]

I've been on hiatus while the electric company restored power to the Manor House. 

Dimension "c" is 7mm.

I have an old transmission of unknown vintage out in the garage.  Let me find the parts in question so I can post a photo  and some dimensions.

thanks ,so guess that #C suspicion is out

[The Mighty Gryphon]

Get a length of stiff wire that will fit through the transmission where the pushrod goes and get a measurement from the face of the input shaft to the face of the boss that the puck goes into.  I am going out to measure mine right now.

[The Mighty Gryphon]

The distance on my transmission is 11cm.  Will now take a photo of the puck and thrust bearing on my transmission.

[SJK]

In the meantime, maybe it would help to get a picture of the rear face of the puck and the rear end of the transmission with the rod sticking through so we can see how far it protrudes rearward with the puck off. I have an extra trans, rod and engine lying around for comparison.

Just checking if your Gearbox and Pushrod compared to my pictures I up uploaded earlier?

-with the pushrod pushed in to the maximum of the gearbox from the front , how far does the Puck and Pushrod stick out?

[Laitch]

Hope you still alive  :yes

Thanks. I can cross that off my bucket list. Next on the list is snorkeling with pirahnas in the Orinoco.

The top photo is the adjusting bolt's position when the clutch was slipping and you removed the arm assembly?