73 Z1 mutt/mixed breed Build

  • Wookie58
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21 Jun 2024 13:20 #901082 by Wookie58

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22 Jun 2024 11:46 #901121 by Coyote
Replied by Coyote on topic 73 Z1 mutt/mixed breed Build
Not out of the woods yet. Put my other triple tree on and still have the same problem. Look at the relationship between the bottom clamps of the triple tree and the level, still think the heads twisted. May have to change this to a 76 mutt build. I'm going to order some new fork tubes and see if that does anything but I really doubt it. I have a 76 frame I can move over to and and see what kind of shape it's in. I'm working on a head job right now for the '73 engine replacing valve guides and cutting seats etc. Does anyone know where to buy a APE VGK900 valve guides individually? I bought a reamer off of Amazon.... Yeah I know... And didn't test it before I used it on one of the valve guides, it was listed as a 7 mm reamer and turns out it was 7.02 mm. Now I need to replace one new valve guide and of course get the correct reamer

 

77 KZ 1000 A
21 Z900 RS
Project 73 Z1

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22 Jun 2024 12:03 - 22 Jun 2024 12:15 #901123 by zed1015
Replied by zed1015 on topic 73 Z1 mutt/mixed breed Build

Does anyone know where to buy a APE VGK900 valve guides individually? I bought a reamer off of Amazon.... Yeah I know... And didn't test it before I used it on one of the valve guides, it was listed as a 7 mm reamer and turns out it was 7.02 mm. Now I need to replace one new valve guide and of course get the correct reamer

  
What type of reamer are you using ?
Those APE guides are Aluminium bronze and cannot be reamed with a HSS reamer.
You must either size them with a carbide hone, solid carbide reamer or an expanding diamond reamer as available from Goodson tools.
I have never seen any of these available from Amazon.
 

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-





Last edit: 22 Jun 2024 12:15 by zed1015.
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22 Jun 2024 12:22 #901124 by Coyote
Replied by Coyote on topic 73 Z1 mutt/mixed breed Build
The wrong one , just ordered a Performance CBN solid carbide reamer 7.00mm.

77 KZ 1000 A
21 Z900 RS
Project 73 Z1

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  • Wookie58
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22 Jun 2024 12:35 #901127 by Wookie58
Replied by Wookie58 on topic 73 Z1 mutt/mixed breed Build

Not out of the woods yet. Put my other triple tree on and still have the same problem. Look at the relationship between the bottom clamps of the triple tree and the level, still think the heads twisted. May have to change this to a 76 mutt build. I'm going to order some new fork tubes and see if that does anything but I really doubt it. I have a 76 frame I can move over to and and see what kind of shape it's in. I'm working on a head job right now for the '73 engine replacing valve guides and cutting seats etc. Does anyone know where to buy a APE VGK900 valve guides individually? I bought a reamer off of Amazon.... Yeah I know... And didn't test it before I used it on one of the valve guides, it was listed as a 7 mm reamer and turns out it was 7.02 mm. Now I need to replace one new valve guide and of course get the correct reamer

 
Well that sucks 

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22 Jun 2024 12:50 #901129 by Coyote
Replied by Coyote on topic 73 Z1 mutt/mixed breed Build
A few more observations I've made that I wanted to share. The two heads I was considering using are in the first picture. The one on the left is a 73 head. The one on the right is a 79 head. I was leaning towards the 79 since the fins were in better shape and I do know there are differences in the valve spring setup and the what appear to be EGR passages but the stock 73 valve cover should still work. Then I found the cracks highlighted in the 2nd picture. Now I've moved back to the 73 head. Does anybody have any experience with repairing broken fins? The cracks in the '79 head render it junk I'm assuming, and was wondering if I cut the fins off of it and had them attached to the 73, is that even possible?

77 KZ 1000 A
21 Z900 RS
Project 73 Z1

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22 Jun 2024 12:51 #901130 by Coyote
Replied by Coyote on topic 73 Z1 mutt/mixed breed Build
Picture 2&3

 

77 KZ 1000 A
21 Z900 RS
Project 73 Z1

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22 Jun 2024 13:01 - 22 Jun 2024 13:01 #901134 by Wookie58
Replied by Wookie58 on topic 73 Z1 mutt/mixed breed Build
The cracks can be repaired by "Stitch welding" (a process used a lot in the vintage car world where replacements just aren't an option) but I have no idea of cost
Last edit: 22 Jun 2024 13:01 by Wookie58.
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22 Jun 2024 13:47 #901140 by Coyote
Replied by Coyote on topic 73 Z1 mutt/mixed breed Build
I kinda figured it could be repaired in a sho nuff pinch, but would probably have better luck finding another. Any ideas on repairing the fins?

77 KZ 1000 A
21 Z900 RS
Project 73 Z1

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  • Kelly E
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22 Jun 2024 14:08 #901143 by Kelly E
Replied by Kelly E on topic 73 Z1 mutt/mixed breed Build
I have seen some fin repairs using other fins that were invisible.

The Rust Bros. Garage Collection
1974 Honda CB 550 K0
1975 Honda CB 400F Super Sport
1977 Kawasaki KZ 1000 LTD
1980 Suzuki GS 1100E
1982 Honda CB 900F Super Sport
1983 Honda CB 1100F
1984 Honda Sabre 700
1984 Honda Interceptor 1000
1990 Moto Guzzi 1000
1994 Kawasaki ZG 1000 Concours

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22 Jun 2024 17:10 #901149 by Mikaw
Replied by Mikaw on topic 73 Z1 mutt/mixed breed Build
Find a car engine builder the spicificly works on aluminum heads. They will be able to either build up weld on the broken fins then you shape as necessary or could weld on sections of donor fin. 

1976 KZ 900 A4 kzrider.com/forum/11-projects/613548-1976-kz-900-a4
1976 KZ 900 B1 LTD
1978 KZ 1000 B2 LTD
1980 KZ 750 E1
Kowledge Speaks, But Wisdom Listens.
Jimi Hendrix.
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22 Jun 2024 17:19 #901150 by Cra-z1
Replied by Cra-z1 on topic 73 Z1 mutt/mixed breed Build
All the welders I have used preferred to build up the fin rather than weld on a piece from another head. But I"m sure there have been others who have welded in donor fins
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