FIRST POST Valve Timing - Z1000J and Z1000K - KZRider Forum - KZRider, KZ, Z1 & Z Motorcycle Enthusiast's Forum

JTBS
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FIRST POST Valve Timing - Z1000J and Z1000K

24 Dec 2025 23:49 - 25 Dec 2025 05:17

#920036

I have been asked to fit some Z1000J cams into a Z1000K engine. I wish to dial them in accurately in using slotted cam wheels, can anyone supply me with the opening/closing figures for inlet and exhaust cams for both J and K engines please so that I can calculate the lobe centre figures. The manual that we have for the engine does not supply any information other than setting up using the standard procedure.
Regards,
Bill S

Last edit: 25 Dec 2025 05:17 by Street Fighter LTD.

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zed1015
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Re: FIRST POST Valve Timing - Z1000J and Z1000K

25 Dec 2025 05:49 - 25 Dec 2025 05:50

#920041

The stock lobe centre cam timing figure for all the 900 through 1100 8 valve aircooled fours is 110 degrees regardless of cam profile and lift etc so there's no real need to know the actual opening and closing figures of the individual models.

AIR CORRECTOR JETS FOR VM CARBS AND ETHANOL RESISTANT VITON CHOKE PLUNGER SEAL REPLACMENT FOR ALL CLASSIC AND MODERN MOTORCYCLE CARBURETTORS
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Last edit: 25 Dec 2025 05:50 by zed1015.

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Re: FIRST POST Valve Timing - Z1000J and Z1000K

25 Dec 2025 08:24

#920046

There is a manual located in the filebase that has the info you are seeking.

kzrider.com/filebase-alias?view=download...vice-manual&catid=20

1977 KZ650 B1
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KZQ
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Re: FIRST POST Valve Timing - Z1000J and Z1000K

25 Dec 2025 08:39 - 25 Dec 2025 08:39

#920048

Welcome to KZR Bill S,
As you have read above, you need to just ask.
Thanks
Bill/KZQ

www.KZ1300.com
Riders:
1968 BSA 441 Shooting Star, 1970 BSA 650 Lightning, 1974 W3, 1976 KZ900, 1979 KZ750 Twin, 1979 KZ750 Twin Trike, 1981 KZ1300, 1982 KZ1100 Spectre, 2000 Valkyrie, 2009 Yamaha Roadliner S. 1983 GL 1100
Projects:
1985 ZN1300

Last edit: 25 Dec 2025 08:39 by KZQ.

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