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Clutch adjustment gpz1100b1

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Robw
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Clutch adjustment gpz1100b1

#1 PostAuthor: Robw » Sat May 23, 2020 3:22 pm

Having a few conflicting issues with this one, so could do with some guidance. The factory manual mentions a ball bearing for a b2 but there is no picture or obvious part number in the parts manual.
The engine is a 1981 b1, it has the newer ramp and roller clutch release mechanism and a new pushrod.
I put an 8mm ball bearing at the clutch end where the push goes and it jammed solid, i had also tried a 6mm ball bearing and the is obviously too small ( 8mm as its the same as early pushrod/6mm as recommended)
20200522_165517.jpg
20200522_165517.jpg (118.81 KiB) Viewed 2501 times

I have adjusted the cable turning the screw anticlockwise and i have to adjust the mid cable adjuster to its max, even with this the clutch is just disengaging causing the wheel to drag. I have taken the clutch plates out and oiled them up as well.
Any help would really be appreciated
Rob
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20200523_152146.jpg
Z1000R/ZRX, RD 125LC, Zx7r , Endurance racer, gpz1100b1

Philippe
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Re: Clutch adjustment gpz1100b1

#2 PostAuthor: Philippe » Sat May 23, 2020 4:11 pm

Hi Rob

there is NO steel ball between the clutch and the push rod like in the old Zeds.
Are you sure you have the correct push rod ? Is it not too short ? It doesn't matter what type of clutch release mechanism you have, they both use the same push rod. Before you ask, I don't know the lenght of the rod. I forgot to measure it, sorry...
It's a pain in the a... to adjust the clutch. I know...
Just take out the steel ball, make sure the push rod is fully in the axle so that it touches the clutch.
Take the clutch release mechanism apart, put grease in it, mount it correctly and adjust it. If you have all the correct parts it should work.
Make sure the clutch cable sits correct in the chain cover, screw in all the adjusters so that you have the full lenght of the cable and mount the release mechanism so that the cable holder points down. When you pull the clutch lever the release mechanism turns counterclockwise and comes out of the chain cover, pushing in the rod and disengaging the clutch.
I hope my explanation is clear and that it helps you.
Good luck!
GrtZ
Philippe
the differences between a little boy and an adult man is the price and size of their toys!

Robw
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Re: Clutch adjustment gpz1100b1

#3 PostAuthor: Robw » Sat May 23, 2020 4:37 pm

Hi Phillipe, I removed the ball bearing as soon as i tried it out. The push rod is the correct one as i used the part number on the manual, although a superceeded part number, its the correct length.
I am tweaking the adjustment and its slow going but I think I am making progress.
Rob
Z1000R/ZRX, RD 125LC, Zx7r , Endurance racer, gpz1100b1

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warren3200gt
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Re: Clutch adjustment gpz1100b1

#4 PostAuthor: warren3200gt » Sat May 23, 2020 4:52 pm

Not quite true Phillipe. There is a ball bearing in 650's. So not all old Z's didn't have them. Not sure if Rob's should or shouldn't.
PUM 488 June 2023
76 Z900A4, 77 Z650B1, 77 KZ650B1, 77 Z1000A1, 82 Z1000J2, ZRX1100R.

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Al
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Re: Clutch adjustment gpz1100b1

#5 PostAuthor: Al » Sat May 23, 2020 5:33 pm

Just dug out my old pushrod (2 the same length, one is bent) which i think you know i replaced with a piece of silver steel. It measures 311mm. One end cap appears to be just shy of fully home so perhaps 310mm but no more and no less.
Looking at the contact point in the centre of my old pressure plate; it has a roller ball bearing and a flat hardened centre piece. It you had a ball bearing there, when operating the lever the ball would just fall off the end of the rod into the hub so i really cant see how it could have had one. The different manuals clearly show both, the presence and absence of that ball bearing. Were it to have one it would need a different centre piece to the pressure plate but i dont know what that would be except a mushroom shaped item that extends into the main shaft.
The other 2 pushrods i have are 335mm long. One i think is from an 1100R, the other i dont know about its origins.
All four rods are 8mm diameter.

AL
1981 J1

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Al
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Re: Clutch adjustment gpz1100b1

#6 PostAuthor: Al » Sat May 23, 2020 5:52 pm

From the base manual (third edition 1989)

Ball Item 10.jpg
1981 J1

Robw
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Re: Clutch adjustment gpz1100b1

#7 PostAuthor: Robw » Sat May 23, 2020 9:05 pm

Al, thats the picture i have, but it isnt replicated in any of the parts manuals. The pushrod is 335mm, the number from the parts catalogue has been superceeded but it matches the lawson one. Just have to keep fiddling with it to get it right. Chris Tombleson reckons it doesnt have one unless its an early model. Confusing or what.
Rob
Z1000R/ZRX, RD 125LC, Zx7r , Endurance racer, gpz1100b1

Philippe
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Re: Clutch adjustment gpz1100b1

#8 PostAuthor: Philippe » Sun May 24, 2020 2:52 am

Hi Rob
I hope you get it right! Keep on trying, you'll get there. It's quite confusing Iknow. :shock:

@ Warren: what I ment is that in the GPZ 1100 B1 and B2 there is no steel ball between the push rod and the clutch.
The old Zeds do have a steel ball between the push rod and the clutch.
When I speak about the "old Zeds" I speak about the Z900 and Z1000 types.
I don't know anything about a Z650 because I don't own one (yet)...maybe something to consider . :hah!

GrtZ
Philippe
the differences between a little boy and an adult man is the price and size of their toys!

Robw
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Re: Clutch adjustment gpz1100b1

#9 PostAuthor: Robw » Sun May 24, 2020 1:57 pm

Ok update time. Finally sorted it. The gpz does not have a ball bearing fitted. Tried with one and it jams up the clutch. Also spoke to Chris Tombleson and he said nope doesnt have one. Stripped the clutch down and saw the hub was worn by the plates. I had a better condition spare and cleaned up any wear marks, fitted it and adjusted. Works well now. Not sure why the difference between similar bikes, but apart from that picture there is no mention of a ball bearing or a picture of it in the manual. Parts or workshop.
Cheers for all the help.
Z1000R/ZRX, RD 125LC, Zx7r , Endurance racer, gpz1100b1

Philippe
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Re: Clutch adjustment gpz1100b1

#10 PostAuthor: Philippe » Sun May 24, 2020 3:06 pm

Hi Rob
thanks for the update!
Glad you worked it out.
GrtZ
Philippe
the differences between a little boy and an adult man is the price and size of their toys!


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