Does a cylinder head with dropped valve have any value?

  • PoMoFleet
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Does a cylinder head with dropped valve have any value?

28 Jan 2024 08:32
#894519
This cylinder head looks kind of bad to me but upon inspection it doesn’t have any broken fins. It does have missing screws and one of the valve ports look bad. can it be salvaged or is it ready for salvage? Appreciate y’alls expertise. Thoughts?

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  • Wookie58
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Re: Does a cylinder head with dropped valve have any value?

28 Jan 2024 08:55 - 28 Jan 2024 09:00
#894521
That one is "marginal" at best, all the damage would need smoothing out to avoid "hotspots" and "pre-ignition" removing that much material would lower the compression on that cylinder. the valve seat would need replacing and probably the guide, it's repairable but would be expensive to do correctly
Edit: the ports look a mess also, hard to tell from the pics how bad
1982 KZ1000 Ltd
www.kzrider.com/forum/11-projects/617631...-82-begins?start=192
kzrider.com/filebase-alias?view=download...d-fault-diagnosis&ca
Last edit: 28 Jan 2024 09:00 by Wookie58.
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Re: Does a cylinder head with dropped valve have any value?

28 Jan 2024 09:11
#894522
Not sure it gets better with the pics. Thank you. If anyone in the community wants to practice on it and wants to make a gentle-person’s (nominal) offer + pay for shipping (heavy) I’ll send it your way. Just holler. 

Otherwise it’ll be shelf art. 
 

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  • z1kzonly
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Re: Does a cylinder head with dropped valve have any value?

28 Jan 2024 09:11
#894523
30 cents a pound for aluminum at a scrap yard! Don't waste any time on that! I've scrapped better ones
Livin in "CheektaVegas, NY
Went thru 25 of these in 40 yrs.
I SOLD OUT! THE KAW BARN IS EMPTY.
More room for The Old Girl, Harley 75 FLH Electra Glide,
Old faithful! Points ign. Bendix Orig. carb.
Starts everytime!
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  • zed1015
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Re: Does a cylinder head with dropped valve have any value?

28 Jan 2024 10:41
#894534
Easily fixable.
Don't scrap it..

 
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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  • Nessism
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Re: Does a cylinder head with dropped valve have any value?

28 Jan 2024 11:12
#894536
Scrap metal.  Anything can be fixed, but why?  Find a better head.  They aren't that expensive.
Ed
Carb O-ring Kits : www.kzrider.com/forum/3-carburetor/61807...-o-ring-kits?start=0

www.kzrider.com/forum/faq-wiki/618026-new-owner-things-to-know

1981 KZ750E2
www.kzrider.com/forum/11-projects/604901...z750e-project-thread
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Re: Does a cylinder head with dropped valve have any value?

28 Jan 2024 11:55
#894543
Depends on what it is. My KZ 1000 junk head was bad but not that bad. Took some doing and light porting then it turned out GREAT. I wouldn't even try with that one.
Steve


 
Z1b1000 1975 Z1b
kzrider.com/forum/11-projects/598262-kz-...-will-it-live#672882
kzrider.com/forum/2-engine/597654-poser?start=240#704229
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  • willemZ900
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Re: Does a cylinder head with dropped valve have any value?

28 Jan 2024 12:59
#894546
Also no cam caps, nice cylinder to "play" but don't put any money in it
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  • TexasKZ
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Re: Does a cylinder head with dropped valve have any value?

28 Jan 2024 13:52
#894551
If you have the cam cap that came with that head, a proper shop with the right equipment and experience can fix it.

 
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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  • Injected
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Re: Does a cylinder head with dropped valve have any value?

28 Jan 2024 20:02 - 28 Jan 2024 20:03
#894564
You have to remember you can't deck (skim) a 650 head very much unlike a 900 head, that issue will play into that combustion chamber repair.
 
1978 KZ650B2 w 1197cc Z1 engine
1977 KZ650B1 w 750cc Spectre engine
1979 KZ650C3 w 831cc Hot Rod engine
1978 KZ650C2 w 762cc DFI project
1977 KZ650C1 stock restoration project
1978 KZ650B2 modified project
1978 KZ650B2 Injected Drag 831cc
1980 Z1 Custom Frame Drag 1327cc
1981 Z50R Honda tow bike
Last edit: 28 Jan 2024 20:03 by Injected. Reason: sp

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Re: Does a cylinder head with dropped valve have any value?

28 Jan 2024 20:57
#894565
Looks like a KZ 1000 head so it might be worth fixing.
Steve
Z1b1000 1975 Z1b
kzrider.com/forum/11-projects/598262-kz-...-will-it-live#672882
kzrider.com/forum/2-engine/597654-poser?start=240#704229
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Re: Does a cylinder head with dropped valve have any value?

29 Jan 2024 07:53
#894586
SWest wrote:
Looks like a KZ 1000 head so it might be worth fixing.
Steve
 
My bad, did not see the bearing shells...
1978 KZ650B2 w 1197cc Z1 engine
1977 KZ650B1 w 750cc Spectre engine
1979 KZ650C3 w 831cc Hot Rod engine
1978 KZ650C2 w 762cc DFI project
1977 KZ650C1 stock restoration project
1978 KZ650B2 modified project
1978 KZ650B2 Injected Drag 831cc
1980 Z1 Custom Frame Drag 1327cc
1981 Z50R Honda tow bike
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