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Standard valve sizes for Z1R D1
Posted: Tue Jun 12, 2018 6:27 pm
Author: Big Fluff
As the genuine shop manual makes no reference to the head sizes, can anyone please confirm what the standard size valves should be in a 78 Z1R ?
I have 30mm for exhaust and 36mm for inlet
They are all of the round collet type.
Additionally, the valve sets offered by Z-Power also have no head size reference either. Very helpful.
Thanks Will
Re: Standard valve sizes for Z1R D1
Posted: Tue Jun 12, 2018 6:47 pm
Author: zed1015
All the same size on all the kickstart engines.
36mm in and 30mm ex.
Early 900 motors has squared collet groove and the rest are round.
Re: Standard valve sizes for Z1R D1
Posted: Tue Jun 12, 2018 8:36 pm
Author: Big Fluff
Thought as much Rob, just testing my aging sanity.
Just sorting through my old valve train parts, found a set of 38mm inlet and 32mm exhaust Manley valves out of my old Manzano head when I used to drag race in the 80s.
Re: Standard valve sizes for Z1R D1
Posted: Wed Jun 13, 2018 5:42 am
Author: rpeters
I think the square tops, MKII etc have the bigger valves?
Re: Standard valve sizes for Z1R D1
Posted: Wed Jun 13, 2018 7:32 am
Author: zed1015
rpeters wrote:I think the square tops, MKII etc have the bigger valves?
Square top MK2/ST etc have the same 30/36 valves.
It's just the H type injection heads that has them 1mm bigger at 31/37.