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Can you please elaborate on this as I don't understand.Sorry for sounding stupid, but I even asked my friend who is a architect and he also is confused as to where to end the cutting procedure when you come closer to the centre of the flywheel.

Jeff Taylor does it for $100

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All good and well, but altough we are neighbours, we are still a little bit far away from you.

the postage would be cheaper coming back....

Cheers for the pic DM

what's on the other side of this page Dodgeman? and the page after that? and the page after that?

Camshaft specs, & diagrams, then more cam stuff along with valve spring retainer & rocker details, followed by valve specifications with dimentioned diagrams.

Have another look at the picture & you can see some of the stuff on the other side of this page.

The standard B110 flywheel [Pt. No. 12310-H1000] should weigh 9.7 Killergrammes, while the Race Option flywheel [Pt. No. 12310-H2310] comes in at 6.4 Killergrammes
I do not know the weight of a flywheel that has been modified as per the illustration.

I have some really bad photocopies of the same book. It has some awesome stuff for tricking out a12s, and lots of part numbers for parts that probably arent availble any longer.

can anyone tell me where these and the other diagrams in DM's photoalbum came from? what book, manual or whatever else it may have been in?
also i can get a finished wieght in about a week or 2 becuase im going modifying my a12 flywheel at tafe to these specs

can someone tell me? dodgeman would it be possible for you to post up more of these diagrams?

The book is called
"Datsun B110 Competition Tune-Up Manual" & it was published by the Nissan Motor C. of Tokyo Japan in 1974.

I guess I can post up more stuff, & have already. Are you looking for something specific?
Here's some links.

Link to Block/ Cylinder bore mods.
Link to Rod mods.
Link to Head bolt info.

thanks Dman do you know where i could get one of these from? yeh ive seen the others you have posted i want them so then i could possibly use or have them as a refrence later on

finished wheight is about 6.5kgs a total of 2kgs gone will post pics if wanted

@datto1000wagon
Can you please email me the pictures of where it was cut on the flywheel.I am a little confused by the picture posted by Dodgeman.Excuse my stupidity, but I don't want to mess up my spare, stock A12 flywheel when taking this in to be done.OR, can I just take the picture that Dodgeman posted and my flywheel to a engineering shop and they will know exactly where and how much to cut?

yea i will post up the pics asap but may take a few days cause i have exams coming up and wish to study for them during the weekend but after the first few days of next week i will post them up

there they are

I'm sure a machinist would understand the factory diagram.

But the photos really helped me understand exactly where to cut. Those two cuts take of 1/3 of the weight.

Thanks Dman and D1kWagon!

Hi guys
I may sound very stupid but I examined this picture over the weekend.I can figure out how much to cut and where to start, except on the inner radius of the hatched part.Lets say I start cutting it from the outside of the flywheel inwards to the centre, how do I know where to stop?
There is'nt a indication of where to stop as you go inwards when cutting.Can someone assist me.Why I need to know this is for curiousity's sake and also to check that the mechinist has done the job right.Don't what the flywheel to fly apart when installed.

that hatched section is 70mm from the center

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What do you mean? Does the hatched part start 70mm from the centre and then go upwards to the outside?
The outside is easy to figure where to start, but I don't know when to stop as you get closer to the centre of the flywheel when cutting inwards. You know, there where the 17R is standing.Or is the 17R the thickness.How do they measure it?

just measure the section opposite the hatched section (the bit that goes in?) do you get what i mean??

Sort of.This I understand.The problem is, lets say I start cutting the disc from the outside and it moves the cutter from the outside radius of the flywheel towards the inside radius of the flywheel(from the top 5R towards the 17R part of the diagram).How will I know when to stop because it does'nt give me a radius indication for example like the 230dia (or 240.48 dia)as to where to stop.

140-240=100mm so go in 100mm