KZ900 valve shims Machining

  • Rolf1976_KZ900
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Re: KZ900 valve shims Machining

30 Jan 2025 10:04 - 30 Jan 2025 10:10
#908446
If you have 37.80 it look like you have space . look at picture 4  .I posted some more info from 1976 kz900 manua how to measure too
Last edit: 30 Jan 2025 10:10 by Rolf1976_KZ900. Reason: messed up posting
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Re: KZ900 valve shims Machining

30 Jan 2025 11:08
#908448
Thank you for your valuable advice guys !  You are worth much more than AI or chatgpt LOL

I will tell the mechanic who did that to coppy 100 times:


 
Kawasaki:
S1 250 triple 1973
H1, 500 triple 1975
LTD 1000, 1982
Ninja 1000R 1987
Ninja ZX12R 2006
KZ900 1976.
Yamaha RD 350 1973
Ducati 1098 2007
Harley Softail 2009 For sale !

Mechanic at:
Daytona Motor Montreal.
Kawasaki Center.
Pont Viau Motorcycle.
Chabot Marine & Sport.
Honbec Mtl.
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Re: KZ900 valve shims Machining

26 Feb 2025 13:00
#909429
I also found a valve lifter with gouges on the inside. I have no clue of what could happen there !! The valve stem look ok.

Kawasaki:
S1 250 triple 1973
H1, 500 triple 1975
LTD 1000, 1982
Ninja 1000R 1987
Ninja ZX12R 2006
KZ900 1976.
Yamaha RD 350 1973
Ducati 1098 2007
Harley Softail 2009 For sale !

Mechanic at:
Daytona Motor Montreal.
Kawasaki Center.
Pont Viau Motorcycle.
Chabot Marine & Sport.
Honbec Mtl.

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Re: KZ900 valve shims Machining

26 Feb 2025 19:03
#909433
I have never seen that issue
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  • TexasKZ
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Re: KZ900 valve shims Machining

26 Feb 2025 19:24
#909436
It looks like the valve has been hitting off center and that there are welding boogers in there, too. I would consider using a different one.
1982 KZ1000 LTD parts donor
1981 KZ1000 LTD awaiting resurrection
2000 ZRX1100 not ridden enough

www.kzrider.com/11-projects/620336-anoth...uild-thread?start=24
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Re: KZ900 valve shims Machining

27 Feb 2025 16:35
#909482
TexasKZ wrote:
It looks like the valve has been hitting off center and that there are welding boogers in there, too. I would consider using a different one.

Or maybe a keeper? And it look like TIG spot welding to replace the center.... RRRRrrrrrr!!

Anyway, a new lifter is on the way, but I'm disappointed with the salvage work that some shop of good reputation (...) in Montreal, Canada can do!
I called the mechanic who did this... No problem my friend,  I have done this several times.
 
Kawasaki:
S1 250 triple 1973
H1, 500 triple 1975
LTD 1000, 1982
Ninja 1000R 1987
Ninja ZX12R 2006
KZ900 1976.
Yamaha RD 350 1973
Ducati 1098 2007
Harley Softail 2009 For sale !

Mechanic at:
Daytona Motor Montreal.
Kawasaki Center.
Pont Viau Motorcycle.
Chabot Marine & Sport.
Honbec Mtl.

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Re: KZ900 valve shims Machining

28 Feb 2025 00:09
#909490
Kaw-boy 900 wrote:
TexasKZ wrote:
It looks like the valve has been hitting off center and that there are welding boogers in there, too. I would consider using a different one.

Or maybe a keeper? And it look like TIG spot welding to replace the center.... RRRRrrrrrr!!

Anyway, a new lifter is on the way, but I'm disappointed with the salvage work that some shop of good reputation (...) in Montreal, Canada can do!
I called the mechanic who did this... No problem my friend,  I have done this several times.

 
This is why I outsource as little as possible, you just don't know what you are going to get for the chunks of money it costs you
1982 KZ1000 Ltd
www.kzrider.com/forum/11-projects/617631...-82-begins?start=192
kzrider.com/filebase-alias?view=download...d-fault-diagnosis&ca
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Re: KZ900 valve shims Machining

06 Mar 2025 06:57 - 06 Mar 2025 11:58
#909720
The valve spring keeper that were installed are not the right one (round grouve instead of square). I ordered OEM part # 12011-002.
 
There was 7 valves with round and 1 with square keeper. Maybe it was related to the valve lifter issue :(

I'm just about to make free publicity for that shop in Longueuil Quebec, Canada that did the work !

 
Kawasaki:
S1 250 triple 1973
H1, 500 triple 1975
LTD 1000, 1982
Ninja 1000R 1987
Ninja ZX12R 2006
KZ900 1976.
Yamaha RD 350 1973
Ducati 1098 2007
Harley Softail 2009 For sale !

Mechanic at:
Daytona Motor Montreal.
Kawasaki Center.
Pont Viau Motorcycle.
Chabot Marine & Sport.
Honbec Mtl.
Last edit: 06 Mar 2025 11:58 by Kaw-boy 900.

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Re: KZ900 valve shims Machining

21 Mar 2025 14:26 - 21 Mar 2025 14:33
#910324
The head and valves are back from the machine shop, Sterms, springs retainers and keepers trimmed.  Valves shims are 2.70 - 2.80 Ex and 2.55 - 260 mm. (2 of each from Zi Entreprises set) I'm happy with the results. Now waiting for new valve seals.

It look like the previous owner or his mechanic had issue with thin shim !  There is 2 bucket like this. What else can make this kind of marks ?     
Kawasaki:
S1 250 triple 1973
H1, 500 triple 1975
LTD 1000, 1982
Ninja 1000R 1987
Ninja ZX12R 2006
KZ900 1976.
Yamaha RD 350 1973
Ducati 1098 2007
Harley Softail 2009 For sale !

Mechanic at:
Daytona Motor Montreal.
Kawasaki Center.
Pont Viau Motorcycle.
Chabot Marine & Sport.
Honbec Mtl.
Last edit: 21 Mar 2025 14:33 by Kaw-boy 900.

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  • TexasKZ
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Re: KZ900 valve shims Machining

21 Mar 2025 15:07
#910325
Running without a shim could leave those marks as well as damage the cam lobe.
1982 KZ1000 LTD parts donor
1981 KZ1000 LTD awaiting resurrection
2000 ZRX1100 not ridden enough

www.kzrider.com/11-projects/620336-anoth...uild-thread?start=24
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Re: KZ900 valve shims Machining

22 Mar 2025 06:12
#910342
TexasKZ wrote:
Running without a shim could leave those marks as well as damage the cam lobe.
+1 on that.
That bucket has been run without a shim.
Most likely a ground shim shattered and was spat out.
I would advise replacing any buckets with that damage.
The indent /trough on the bucket caused by the cam will leave a void under the replacment shim which could also cause that one to fracture as well.
AIR CORRECTOR JETS FOR VM CARBS AND ETHANOL RESISTANT VITON CHOKE PLUNGER SEAL REPLACMENT FOR ALL CLASSIC AND MODERN MOTORCYCLE CARBURETTORS
www.kzrider.com/23-for-sale/611992-air-c...lide-mikunis?start=0





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  • Rolf1976_KZ900
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Re: KZ900 valve shims Machining

22 Mar 2025 06:41 - 22 Mar 2025 06:42
#910344
zed1015 wrote:
TexasKZ wrote:
Running without a shim could leave those marks as well as damage the cam lobe.
+1 on that.
That bucket has been run without a shim.
Most likely a ground shim shattered and was spat out.
I would advise replacing any buckets with that damage.
The indent /trough on the bucket caused by the cam will leave a void under the replacment shim which could also cause that one to fracture as well.

 
regarding shim buckets on the z900  i heard somehwere that on some z900 the buckets came with a void from factory that made shims crack.They was later replaced. Do you know anything about that ? and is it anyway to identify the buckets that is good ?
Last edit: 22 Mar 2025 06:42 by Rolf1976_KZ900. Reason: spelling
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