Z1OwnersClub GB

Hi, I have a set of Moriwaki F1 camshafts in my 1980 Z1R engine

Can anyone advise the technical specifications, such as valve lift and duration figures ?

Phil, hopefully Rob Meggitt might be able to help.

Big Fluff wrote:Phil, hopefully Rob Meggitt might be able to help.

I've searched high and low and unfortuately can't find the specs for any of the Moriwaki cams.
With actually having the cams though it won't be hard to work out most of the info required with just the cam cover off, a dial gauge on the cam and a degree disc on the crank.

thanks for checking Rob

I actually have the Moriwaki catalogue from that period, Its part of the Yoshimura catalogue. It doesn't list lift and duration, just Valve timing , tappet clearance, valve seat width, cylinder head torque and ignition timing, the part number for the cams is 131.201.0052. I may be able to get the other specs, I know someone who has a lot of Moriwaki stuff...

Sorry but I just spoke to my mate and he has the same information I have, If any of it is of help just say so and I'll provide the specs needed...

750 R1 wrote:I actually have the Moriwaki catalogue from that period, Its part of the Yoshimura catalogue. It doesn't list lift and duration, just Valve timing , tappet clearance, valve seat width, cylinder head torque and ignition timing, the part number for the cams is 131.201.0052. I may be able to get the other specs, I know someone who has a lot of Moriwaki stuff...

Sorry but I just spoke to my mate and he has the same information I have, If any of it is of help just say so and I'll provide the specs needed...

sure, any info you can provide will be useful - thanks

if you can post it in this thread, may help someone in the future

These specs are straight from the catalogue

Moriwaki F1 cam Z1000 Z1R

Set at 1mm Valve lift....

Valve timing opening ---------------------------Valve timing closed
Inlet 26 degrees B.T.D.C -----------------------inlet 56 degrees A.B.D.C
Exhaust 56 Degrees B.B.D.C -------------------Exhaust 26 degrees A.T.D.C

Tappet Clearance inlet and exhaust 0.13 - 0.20 ------------Valve seat width Inlet 0.7mm Exhaust 1.0mm

Cylinder head Bolt Torque 3.5 KG-M ------Ignition timing 36 degrees

750 R1 wrote:These specs are straight from the catalogue

Moriwaki F1 cam Z1000 Z1R

Set at 1mm Valve lift....

Valve timing opening ---------------------------Valve timing closed
Inlet 26 degrees B.T.D.C -----------------------inlet 56 degrees A.B.D.C
Exhaust 56 Degrees B.B.D.C -------------------Exhaust 26 degrees A.T.D.C

Tappet Clearance inlet and exhaust 0.13 - 0.20 ------------Valve seat width Inlet 0.7mm Exhaust 1.0mm

Cylinder head Bolt Torque 3.5 KG-M ------Ignition timing 36 degrees

thats much appreciated - thank you. Does it mention max valve lift figures ?

[thats much appreciated - thank you. Does it mention max valve lift figures ?*]

No sorry, It doesn't, you'd probably have to fit the cams and use a dial indicator to find lift and duration numbers,... I did try and get more information for you , my friend has the same cams and data and has never fitted or measured them....

750 R1 wrote:[thats much appreciated - thank you. Does it mention max valve lift figures ?*]

No sorry, It doesn't, you'd probably have to fit the cams and use a dial indicator to find lift and duration numbers,... I did try and get more information for you , my friend has the same cams and data and has never fitted or measured them....

no worries Mick, as you say can check when the clearances are set