Piston Hole Kz1000LTD 1982

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05 Jan 2024 20:19 #893669 by daveo
Replied by daveo on topic Piston Hole Kz1000LTD 1982

Madrid, Spain. Are you in the US?
 

Yes.  A local hardware store may have an o-ring to serve the purpose...
I'd be happy to measure one for you.

www.yelp.com/search?find_desc=Hardware+Stores&find_loc=Madrid

1982 KZ1100-A2

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06 Jan 2024 15:31 #893698 by cartal
Replied by cartal on topic Piston Hole Kz1000LTD 1982
Thank you so much for your help. I know a good shop here in Madrid, and will take the old one to find a replacement.

 

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08 Jan 2024 17:43 - 08 Jan 2024 23:09 #893794 by daveo
Replied by daveo on topic Piston Hole Kz1000LTD 1982

Thank you so much for your help. I know a good shop here in Madrid, and will take the old one to find a replacement.

 

The 670B1508 o-ring measures 7.5mm ID x 2mm thick +/- with my digital micrometer.  The fit is snug over the clutch push rod and yet it allows the rod movement through with little resistance.  The new o-ring fits through a 12mm mic setting with ease, so me thinks the pocket that holds it is that or slightly smaller.





1982 KZ1100-A2

Last edit: 08 Jan 2024 23:09 by daveo.
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12 Jan 2024 00:42 #893902 by cartal
Replied by cartal on topic Piston Hole Kz1000LTD 1982
This is brilliant. Thank you so much!

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06 Feb 2024 07:24 #894914 by cartal
Replied by cartal on topic Piston Hole Kz1000LTD 1982
My initial goal, 2 years ago was to finish the bike in February 2024. By the way it goes, it´s probably going to take at least 1 more year! No time means the engine is moving on really slowly. I hope I´ll gather some momentum at some point in time. 

For the moment, I just mounted the cylinder block. It was way easier than I expected, and the results are amazing; smooth movement of all pistons. Very rewarding. 

I planned to reuse the old chain guides (new chain) but saw some tiny cracks, and decided to buy some new guides.

I am tempted on mounting the engine already on the frame, so it will be easier. 

Next will be to focus on the head. I did a wire brush clean of the valves, and all cleaned up nicely, except the ones corresponding to the "holed" piston (If you look at the initial pictures, you will see I had a piston hole). I am planning, of course, on lapping all valves, and I believe they will end up OK; but would like to share this with the group´s knowledge. I´m ready to order some ZPower parts, so a new set of valves for this piston, is easy to get (all other valves are perfect). 

Here are some pictures for illustration:

  





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06 Feb 2024 08:26 #894918 by Wookie58
Replied by Wookie58 on topic Piston Hole Kz1000LTD 1982
It's looking good Carlos, regards time scales I am also way over my original estimate  . Those valves could be "re-ground" and then lapped but depending how deep they sit may need "tipping". As it's only 2 you have an issue with it may be more cost effective to replace them.
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08 Feb 2024 07:45 #894992 by cartal
Replied by cartal on topic Piston Hole Kz1000LTD 1982
Thank you @wookie58, I just got 2 new valves from Zpower.

Will start lapping the rest... it´ll be fun!
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02 Mar 2024 10:16 #895840 by cartal
Replied by cartal on topic Piston Hole Kz1000LTD 1982
Bear with me… first time ever lapping valves. 

Do you guys see this is OK?

Did first coarse then fine. Funny how the grinding noise suddenly stops.

Feedback welcome!

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02 Mar 2024 10:22 - 02 Mar 2024 10:58 #895841 by cartal
Replied by cartal on topic Piston Hole Kz1000LTD 1982
One more pic

i guess the real question is if the patch I have (circular all the way) should be wider or if it is ok  like this?
Last edit: 02 Mar 2024 10:58 by cartal.

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02 Mar 2024 11:08 #895842 by zed1015
Replied by zed1015 on topic Piston Hole Kz1000LTD 1982
That's ok.. 

AIR CORRECTOR JETS FOR VM CARBS AND ETHANOL RESISTANT VITON CHOKE PLUNGER SEAL REPLACMENT FOR ALL CLASSIC AND MODERN MOTORCYCLE CARBURETTORS
kzrider.com/forum/23-for-sale/611992-air-corrector-jets-





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02 Mar 2024 12:01 #895844 by cartal
Replied by cartal on topic Piston Hole Kz1000LTD 1982
Thank you! Will do the rest of the valves tonight 

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02 Mar 2024 16:57 #895857 by cartal
Replied by cartal on topic Piston Hole Kz1000LTD 1982
So all valves are in place. It was easy to do with a special tool; it would have been a nightmare otherwise. I will post some pics later, but unfortunately, I have (very small) leaks in almost every valve. 

I am wondering if more lapping will solve the issue... 

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