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TOPIC: Valve adjustment Z1/KZ 1000

Valve adjustment Z1/KZ 1000 01 Jun 2017 12:30 #763255

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The last time I had the KZ head off.... maybe 4500-5000 miles ago.... I plastigauge checked my cam bearings and they were all still well within specs.
Even after I replaced that galled intake camshaft, you might recall it was the lobe and shim that was screwed up, not the bearing journal, but the clearances were great even with that other used camshaft!!
That would be at least 35,000-37,000 miles on those cam bearings then... plus the 4-5 thousand miles since .

Since I bought this bike NEW and took ownership in February or March of 1977....I have always been religious about oil and filter changes over the years, picking 2000 to 2500 miles as my oil and filter change targets.
I really think that helped.
But even at that.... 40,000-50,000 miles is not really that long for babbitt style bearings with proper maintenance.
So.... ???
Bruce
1977 KZ1000A1
2016 Triumph T120 Bonneville
Far North East Metro Denver Colorado

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Valve adjustment Z1/KZ 1000 01 Jun 2017 15:21 #763260

  • SWest
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In my case there was a oil pressure problem caused by the welding. I corrected it but too late. The valve train doesn't sing like they did and oil pressure is down a little. The bearings are almost $10 a piece now. The cams are still in spec and I just ordered a whole set of bearings for $30 shipped. Came out of a KZ 1100 with 22,000 miles on it.
www.z1enterprises.com/cam-bearing-z1-kz900-1000-2.html

I changed mine in 13 and god only knows how many miles were on them. The ones shown in the clip are them. I should be able to make up a good set with the new ones. I'll consider myself lucky if this is all it is.
I was in a hurry to get to my daughter's place so we could drive to Stockton pick up my granddaughter and drive back in her car the next morning at 4 AM. About 800 miles. I didn't want her to drive all that way alone. I'm going there tomorrow to fix a bad oil leak before the next trip a few weeks from now. Her man is an electrical engineer, not a mechanic. He works his ass off for his family and this is my contribution to the her and the family.B)

Steve
Z1b1000 1975 Z1b
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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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Valve adjustment Z1/KZ 1000 05 Jun 2017 19:08 #763683

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Well I got them. Coulda mixed and matched what I had. I'll feel better having a matched set.
Steve
Z1b1000 1975 Z1b
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kzrider.com/forum/11-projects/598262-kz-...-will-it-live#672882
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Valve adjustment Z1/KZ 1000 05 Jun 2017 19:20 #763684

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Do you mean each shell half is $10.00 each! Wow. If yes, that adds up fast.
Bruce
1977 KZ1000A1
2016 Triumph T120 Bonneville
Far North East Metro Denver Colorado

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Valve adjustment Z1/KZ 1000 05 Jun 2017 20:14 #763688

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Yup, that's why I slapped up these used ones.
Steve
Z1b1000 1975 Z1b
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Valve adjustment Z1/KZ 1000 07 Jun 2017 19:39 #763874

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Got em in.
Steve
Z1b1000 1975 Z1b
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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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Valve adjustment Z1/KZ 1000 08 Jun 2017 19:07 #763935

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This is a good reason to adjust the valves BEFORE going to the carbs. Sure it's a hassle but worth it. Next is to sync the carbs and dial them in.
Steve
Z1b1000 1975 Z1b
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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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Valve adjustment Z1/KZ 1000 09 Jun 2017 11:08 #763959

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What's the verdict with the valve journal clearance now?
What shim(s) are you needing?
Did you plastiguage the bearings?
Bruce
1977 KZ1000A1
2016 Triumph T120 Bonneville
Far North East Metro Denver Colorado
The following user(s) said Thank You: SWest

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Valve adjustment Z1/KZ 1000 09 Jun 2017 11:46 #763961

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Much tighter. What I have will work. Didn't have to plastigage them. All clearances were tighter. Had to adjust six valves. More to come.
Steve
Z1b1000 1975 Z1b
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kzrider.com/forum/11-projects/598262-kz-...-will-it-live#672882
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Valve adjustment Z1/KZ 1000 09 Jun 2017 14:52 #763970

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It's a wonder it ran as well as it did.
Steve
Z1b1000 1975 Z1b
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Valve adjustment Z1/KZ 1000 10 Jun 2017 13:23 #764023

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Idles better, less noise, less vibration and runs smoother.
Steve
Z1b1000 1975 Z1b
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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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Valve adjustment Z1/KZ 1000 21 Aug 2017 18:02 #769399

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New gasket and adjusted a couple valves.
Steve
Z1b1000 1975 Z1b
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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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