Hello Guest User,

Please feel free to have a look around the forum but be aware that as an unregistered guest you can't see all of it and you can't post.

To access these 'Registered Users Only' areas simply register and login.

Shim replacement

Need help restoring, building, or finding then try here.

Moderators: KeithZ1R, chrisu, paul doran, Taffus

Message
Author
skinnyZED
Regular Poster
Posts: 20
Joined: 28th Nov 2023
Location: Cambridgeshire

Shim replacement

#1 PostAuthor: skinnyZED » Wed Jun 05, 2024 9:11 pm

Hi all,
I have read every posting I can find, but want to clarify one point when swopping valve shims. ( Z1000 1978)
What I have done ; Plugs out, cam cover off, measured clearances, need to change 2 inlets.
So, valve 1, rotate cam with kickstart until cam pushes valve fully open.
Fit kawa tool on carb side
Rotate crank backwards with spanner until cam is pointing away and tool is holding lifter down.
My question is, doing it this way (as per manual) hopefully avoids piston contacting valve but as I rotate the cam backwards, the exhaust can start opening , so is there any possibility the valves would tangle, or am I overthinking it :oh
Thanks very much in advance for any pointers, Stuart

User avatar
zed1015
Hardcore
Hardcore
Posts: 4024
Joined: 2nd Nov 2005
Location: Somewhere between Scunny and Goole.

Re: Shim replacement

#2 PostAuthor: zed1015 » Wed Jun 05, 2024 9:20 pm

If the cam timing is correct the valves cannot contact each other no matter which direction you rotate the crank.

skinnyZED
Regular Poster
Posts: 20
Joined: 28th Nov 2023
Location: Cambridgeshire

Re: Shim replacement

#3 PostAuthor: skinnyZED » Wed Jun 05, 2024 11:22 pm

Great, Thanks for that info, just was hesitating
Btw is a Kawasaki service bulletin that says the valve clearance should now be .10-.15 available anywhere?
It has been ‘discussed’ over a few beers and would be helpful to be able to point at something ,
Cheers,

skinnyZED
Regular Poster
Posts: 20
Joined: 28th Nov 2023
Location: Cambridgeshire

Re: Shim replacement

#4 PostAuthor: skinnyZED » Thu Jun 06, 2024 7:12 am

zed1015 wrote:If the cam timing is correct the valves cannot contact each other no matter which direction you rotate the crank.

Cam timing is ok.
Re read the manual several times,
Just to be 100% sure here, the inlet valve (cyl1) is held open by tool, rotate the engine backwards via timing bolt to point cam away from the shim, the exhaust valve starts to open, so no danger of valve to valve?
I don’t know how close these valves are, pretty close I would guess,
Is there a video somewhere of someone using the valve to and removing a shim,? Might help!
Thanks again!

User avatar
zed1015
Hardcore
Hardcore
Posts: 4024
Joined: 2nd Nov 2005
Location: Somewhere between Scunny and Goole.

Re: Shim replacement

#5 PostAuthor: zed1015 » Thu Jun 06, 2024 8:30 am

With the bucket held open by the tool you only rotate the cam so there's just enough clearance to get the shim out.
No need to point the lobe 180 degrees away from the shim.
Swap the shim and then rotate the cam back to so you can remove the tool.
Aim for 0.15mm clearance with stock cams.

skinnyZED
Regular Poster
Posts: 20
Joined: 28th Nov 2023
Location: Cambridgeshire

Re: Shim replacement

#6 PostAuthor: skinnyZED » Thu Jun 06, 2024 8:50 am

will do, cheers,

chrisu
Moderator
Posts: 4566
Joined: 3rd Sep 2005
Location: Hertford herts

Re: Shim replacement

#7 PostAuthor: chrisu » Thu Jun 06, 2024 9:53 am


skinnyZED
Regular Poster
Posts: 20
Joined: 28th Nov 2023
Location: Cambridgeshire

Re: Shim replacement

#8 PostAuthor: skinnyZED » Fri Jun 07, 2024 7:41 pm

Job done! Thanks for all advice,
3 shims changed,
Taking your time and the proper Kawasaki tool made it easy,
Cheers,


Return to “Bike Help”

Who is online

Users browsing this forum: No registered users and 45 guests