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1977 KZ1000 Head-What's a good mileage to Repair?
- EricHa
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1977 Kawasaki KZ900A5
1975 Honda CB550K
1996 Ducati 900SS CR
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- otakar
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74 Z1-A stock
76 KZ-900 Totaly stock vice MAC pipe
77 KZ-1000A stock
78 Z1-R 100%MINT 500 original Mi.
78 Z1-R Yoshi 1103 kit stage 1 cams Yoshi pipe. Etc
79 KZ-1300 (1400)
80 KZ-1300
81 Scratch built GPz1150R
82 KZ1000
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- EricHa
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1977 Kawasaki KZ900A5
1975 Honda CB550K
1996 Ducati 900SS CR
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- BSKZ650
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77 kz650, owned for over 25 years
77 ltd1000, current rider
76 kz900, just waiting
73 z1,, gonna restore this one
piglet, leggero harley davidson
SR, Ride captian, S.E.Texas Patriot Guard Riders.. AKA KawaBob
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- EricHa
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I didn't want this bike to take away resources from the first project, but it's inevitable I guess!
1977 Kawasaki KZ900A5
1975 Honda CB550K
1996 Ducati 900SS CR
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- PLUMMEN
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Still recovering,some days are better than others.
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- Patton
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How was valve guide on KZ1000 better than Z1 and KZ900?
Good Fortune!
1973 Z1
KZ900 LTD
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- bountyhunter
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Those were the cop bikes used throughout Kali back in the 80's. The machine shop that did my head also serviced their fleet. They told me the average mileage for a service bike was about 20k miles between head jobs. City riding is worst for a bike. Mine had about 45k at the first valve job, the machinist thought I was bringing it in for it's second valve job and couldn't believe it was the first.As a general rule, how many miles can you get out of a KZ1000 head before it needs a valve job?
1979 KZ-750 Twin
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- EricHa
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Wouldn't suspect any difference in top end longevity among Z1, KZ900 or KZ1000.
How was valve guide on KZ1000 better than Z1 and KZ900?
According to Dave Marsden:
In the original Z1 cylinder head, the eight valves moved in bronze guides that were pressed into the head and secured by small circlips. These guides proved to be too soft for the job and were one of the few mistakes Kawasaki engineers made. They were later modified to a cast iron item.
1977 Kawasaki KZ900A5
1975 Honda CB550K
1996 Ducati 900SS CR
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- Patton
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Patton wrote:
Wouldn't suspect any difference in top end longevity among Z1, KZ900 or KZ1000.
How was valve guide on KZ1000 better than Z1 and KZ900?
According to Dave Marsden:
In the original Z1 cylinder head, the eight valves moved in bronze guides that were pressed into the head and secured by small circlips. These guides proved to be too soft for the job and were one of the few mistakes Kawasaki engineers made. They were later modified to a cast iron item.
Yes, but from the info as presented by Mr. Marsden, am thinking the change from brass to iron was done during the 1973 Z1 model run (no clue as to engine number), so later '73 Z1~'76KZ900 would have the iron guides. "Were later modified" is mentioned in the '73Z1 engine chapter, without further reference in later chapters on '74Z1~'76KZ900 or about KZ1000.
Except for early '73Z1 heads with brass guides, am thinking subsequent Z1 and KZ900 heads have the iron valve guides. (But not positive about this.)
Good Fortune!
1973 Z1
KZ900 LTD
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- Patton
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kzzone.com/valves.html
HIGH PERFORMANCE BRONZE VALVE GUIDES
APE valve guides are designed to take the abuse of today's modern high horsepower engines. They are made from special bronze alloy to resist wear and heat. No other valve guide that you can buy will out-perform APE guides. Fact is we supply our guides to nearly all of the top cylinder head shops. Major police departments use them in their patrol bikes which see severe use.
APE guides are precision machined with the bores finished to size.
They are designed to fit lower in the head to clear high lift cams, and use APE seals or factory OEM seals. Sold in sets of 16
Good Fortune!
1973 Z1
KZ900 LTD
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- BSKZ650
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Interesting ---
kzzone.com/valves.html
HIGH PERFORMANCE BRONZE VALVE GUIDES
APE valve guides are designed to take the abuse of today's modern high horsepower engines. They are made from special bronze alloy to resist wear and heat. No other valve guide that you can buy will out-perform APE guides. Fact is we supply our guides to nearly all of the top cylinder head shops. Major police departments use them in their patrol bikes which see severe use.
APE guides are precision machined with the bores finished to size.
They are designed to fit lower in the head to clear high lift cams, and use APE seals or factory OEM seals. Sold in sets of 16
Good Fortune!
wheres Billy Mays when ya need him,,,lol,,and I know hes gone
77 kz650, owned for over 25 years
77 ltd1000, current rider
76 kz900, just waiting
73 z1,, gonna restore this one
piglet, leggero harley davidson
SR, Ride captian, S.E.Texas Patriot Guard Riders.. AKA KawaBob
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