Cam info

customheadf1750 · **Posted:** Tue Apr 08, 2014 8:40 pm

I am checking a 750 F1 engine at the moment and have found the following.

Both heads stamped "P"

Horizontal head contains OE cam
Vertical head contains MV cam

both have IN 41mm and EX 37mm

any particular significance in this combination?

customheadf1750 · **Posted:** Wed Apr 09, 2014 1:32 am

These are the pistons in the engine and their markings

Dick le Dog · **Posted:** Thu Apr 10, 2014 5:13 am

customheadf1750 wrote:

These are the pistons in the engine and their markings

C piston : C bore
B piston : B bore

sorry if this seems obvious ........

618F1 · **Joined:** Thu Oct 14, 2010 11:23 am **Posts:** 1927

It all appears stock to me. But, are you sure those aren't stock 35mm exhaust valves? Ducati would not use a 37mm, and I don't think anyone would bother to increase the size of only that valve. MikeV

customheadf1750 · **Posted:** Thu Apr 10, 2014 11:46 am

Hi Dick, I just put the piston pics in for reference .
It is mainly the cams I was asking about.
I have recently been taking apart 750 sport (1988) engines and dont have
any info on cams and their stamps.
I of course realise that 750 sport and 750 F1 are different but I was hoping
someone could tell me more about cam types..

as for inlet size I may have made a mistake there...will check tomorrow.

Sean

brad black · **Joined:** Mon Jan 21, 2013 4:36 pm **Posts:** 205

std cams, same grind as paso 750 in all 750 onward.

peterbike · **Joined:** Thu Nov 29, 2012 2:06 am **Posts:** 51

Hi, an F1 newbie here. At the moment I have a broken leg, so now I have LOTS of time to start doing some learning.
With reference to the B & C pistons, first what are the piston/bore clearance tolerances ?
Maybe the A piston is 87.95 ? B is 87.96 C 87.97 ?

Also what is the compression ratio on a stock F1 ?
Sean's photo's don't show a side on shot of his pistons to see the piston dome height but they would appear to be higher than a normal domed piston. Which would appear to be a reasonably/slightly high comp. ratio ?

Second thoughts are, is all this information available online ? Or should I buy a book ?
If so, which one ?
Peter Brown
( hiya Brad )

customheadf1750 · **Posted:** Sat Apr 19, 2014 8:22 am

thanks Brad, good to know.

618F1 · **Joined:** Thu Oct 14, 2010 11:23 am **Posts:** 1927

Peterbike, while it is not perfect, I have got to suggest that anyone interested in these bikes buy Ian Falloon's book "DUCATI Belt-Drive Two-Valve Twins Restoration Guide", and read it many times. The revised edition does not contain the very useful addenda that is in the original, but that is supposedly available on line. Parts books and service manual can't hurt. MikeV

peterbike · **Joined:** Thu Nov 29, 2012 2:06 am **Posts:** 51

It appears that there are 2 versions of this book, a white one & a blue one.
Both say the revised edition, are they the same ?

Peter

Cam info

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