Valve buckets and shims

  • Customkz1366
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Valve buckets and shims

22 Jan 2018 05:53 - 22 Jan 2018 05:53
#777563
i have a 1993 kz1000p and i am trying to put a .440 drag cam in. I have heard that you need to use the shim under. Can they be from a 1984 gpz750
Last edit: 22 Jan 2018 05:53 by Customkz1366.

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  • SWest
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Re: Valve buckets and shims

22 Jan 2018 07:31
#777570
Not just the buckets.
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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  • zed1015
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Re: Valve buckets and shims

22 Jan 2018 07:48
#777572
Answer is YES!
You use the Buckets and the retainers from any Z650 - Z/GPZ 750, or GPZ1100 that is under bucket.
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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  • Dr. Gamma
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Re: Valve buckets and shims

22 Jan 2018 09:52 - 22 Jan 2018 09:54
#777577
.440 lift cam is pretty big for normal street use. You will need to relieve the head on the thrust side of cam lobes too. Plus I don't know if the valve reliefs in stock pistons are deep enough for that big of a cam. Better check piston to valve clearance real carefully!! Heavy duty valve springs are a must with that big of a cam. I ran shim under buckets in all my KZ motors. With that much lift, they are a must!!!

Personally I would try something around .385 to .410 lift for a nice street cam.

Here is a early model head relieved for .450 lift cams.
1972 H2 750 Cafe Racer built in 1974.
1976 KH400 Production Road Racer.
1979 Kz1000 MK. II Old AMA/WERA Superbike.
1986 RG500G 2 stroke terror.
1986 GSXR750RG The one with the clutch that rattles!

Up in the hills near Prescott, Az.

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Last edit: 22 Jan 2018 09:54 by Dr. Gamma. Reason: added something.
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Re: Valve buckets and shims

23 Jan 2018 08:43
#777631
thank you very much i appreciate all tour information

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  • Big KZ Jay
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Re: Valve buckets and shims

26 Jan 2018 19:37
#777846
A 440 lift cam will probably have a reduced base circle which requires special valve stem heights.

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Re: Valve buckets and shims

06 Feb 2018 18:58
#778337
after measuring the cams they are actually .385

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