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Can I run this on my engine? 16 Jan 2015 00:00 #658819

  • daveo
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Removed from a 1984 ZN1100-B1 LTD with 8,800 miles
Opinions requested, please... :whistle:


After mineral spirit cleanup...
1982 KZ1100-A2

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What's it worth, and can I run it on my engine? 16 Jan 2015 04:10 #658821

  • zed1015
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Which engine do you want to fit it on.
One of the best heads to have for performance modding.
Bathtub/twin swirl head.
Same casting as GPZ Unitrack but probably shim over bucket instead of under.
Lower compression than earlier KZ9/1000 heads but slightly higher comp than the earlier twin shock GPZ and J heads.
Has steeper valve angle which allowed the larger valves to be used.
Be careful with piston to valve head clearances on assembly.
Depending on application you may need to fit different pistons or machine the valve pocket angle to avoid collision etc.

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





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What's it worth, and can I run it on my engine? 16 Jan 2015 07:20 #658827

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Which engine do you want to fit it on.
Be careful with piston to valve head clearances on assembly.
Depending on application you may need to fit different pistons or machine the valve pocket angle to avoid collision etc.


The engine is a 1982 KZ1100-A2 with stock J pistons.

This beauty has shim over buckets with standard J cams.
I was hoping for a simple, straight forward head-swap...now :unsure:


OE Standard piston I want to use...if possible. :angry:
1982 KZ1100-A2

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What's it worth, and can I run it on my engine? 17 Jan 2015 11:01 #658900

  • GPzEric
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If it were mine, and it's not, I'd take it to a shop and have the valve seals replaced, and the valve seats checked for wear / pitting, but other than that it looks nice. Since you have it off, it's much easier to do it now than wait 2000 miles and have blue smoke coming out of it :)
My wife asked me if I still loved her - I said "Honey, I love you more than new carburetor boots ! "
1982 KZ1100B2 (GPz)
1982 KZ750R1 (GPz)
(2) 1981 KZ550D1 (GPz) 1 mint, 1 under construction
1983 GS1100E
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Can I run this on my engine? 17 Jan 2015 11:12 #658901

  • daveo
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Thank you Zed1015
Someone off-site suggested that this head would work without issues, without having to modify or change pistons...and that I could install a set of 84 GPZ cams to take better advantage of the head design for increased performance.

Where am I?
1982 KZ1100-A2

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What's it worth, and can I run it on my engine? 17 Jan 2015 11:18 #658902

  • daveo
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If it were mine, and it's not, I'd take it to a shop and have the valve seals replaced, and the valve seats checked for wear / pitting, but other than that it looks nice. Since you have it off, it's much easier to do it now than wait 2000 miles and have blue smoke coming out of it :)


:cheer: Thanks GPzEric! I will definitely do as you suggest, and have those thirty-year old seals replaced with Viton.
1982 KZ1100-A2

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What's it worth, and can I run it on my engine? 17 Jan 2015 11:42 #658903

  • GPzEric
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That's how my '82 GPz1100 came to be nicknamed 'The Money Pit' - :)

I wanted one for 30 years, bought it, shipped it across the country for $500 more than high book, and then when I went to check the spark plugs had one break off in the head - had the head taken off, plug removed by a machine shop, discovered worn/rounded piston rings, old vale seals, etc, invested $3k into it, rode it 6 months until the exhaust cam bolts came loose, galled the head casting, ruined the cam, and it's just now going back together with a '84 Gpz head.

I'm sure glad I love the bike !
My wife asked me if I still loved her - I said "Honey, I love you more than new carburetor boots ! "
1982 KZ1100B2 (GPz)
1982 KZ750R1 (GPz)
(2) 1981 KZ550D1 (GPz) 1 mint, 1 under construction
1983 GS1100E
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What's it worth, and can I run it on my engine? 17 Jan 2015 12:23 #658905

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Rest assured, there is one other nut loose besides you...me. :lol:
1982 KZ1100-A2

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What's it worth, and can I run it on my engine? 17 Jan 2015 13:00 #658911

  • tomsbadkz
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This is the head that LarryC did for me for 77 KZ1000 project. mine flows over 100 cfm. best head you can use unless you go for an aftermarket head. we did valves and web cams on mine.its going to be a fun ride.
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What's it worth, and can I run it on my engine? 17 Jan 2015 15:02 #658916

  • kaw-a-holic
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This is the head that LarryC did for me for 77 KZ1000 project. mine flows over 100 cfm. best head you can use unless you go for an aftermarket head. we did valves and web cams on mine.its going to be a fun ride.


What all did you do to make that head work on your bike?
Jon
1977 KZ1000a1
Mesa, AZ
Phoenix Fighter Project

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What's it worth, and can I run it on my engine? 17 Jan 2015 16:27 #658919

  • GPzEric
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Especially if you consider that good used ZX11D's are selling for around $3k :)
My wife asked me if I still loved her - I said "Honey, I love you more than new carburetor boots ! "
1982 KZ1100B2 (GPz)
1982 KZ750R1 (GPz)
(2) 1981 KZ550D1 (GPz) 1 mint, 1 under construction
1983 GS1100E

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What's it worth, and can I run it on my engine? 17 Jan 2015 17:03 #658921

  • tomsbadkz
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on my head we did 38.8 intakes 33 exhaust valves. titanium retainers with kibblewhite .500 springs, Viton seals, APE guides, and WebCams 122/125 grind cams. Larry did the port work. He is a genius!!!!!!!
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