I am rebuilding a Mk2 1275 Cooper S engine.
Can anyone help with identifying the camshaft pictured below. It has 1/2" lobes. There are no numbers anywhere to be seen.

Does it have any raised rings between lobes 1 & 2?

No raised rings anywhere.

1100S

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The bitterness of poor quality (or Crappy Workmanship) remains LONG AFTER the Sweet Taste of Low Price is forgotten.

If it is an 1100S camshaft, how do I check that the cam lobes are suitable for the Mk2 motor.

It looks like it needs refreshing, I would get Graham Russell to regrind it to his 'S' grind. Or similar, eg. his 266SS if you want sportier..

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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R.

How can I find out if this camshaft has already been taken to Cooper S or any other specifications.

take it to a cam grinder. they will tell you the spec

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The bitterness of poor quality (or Crappy Workmanship) remains LONG AFTER the Sweet Taste of Low Price is forgotten.

Having it profiled will cost almost as much as a regrind. If you want a genuine S cam I will have one here.

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1970 Cooper S ex-Bathurst & ATCC
1964 Austin Cooper S ex-Group C race car
1967 Morris Cooper S ex-Group B
1962 Mini Speed sports sedan
1968-71 ex-Peter Manton Shell car

If I use a dial gauge on lobes, and measure the lift, will that help ID the camshaft?

Hi Cooperess
If you measure the overall height of the lobe and compare it with a a std lobe that will tell you if it has been reground or not.
The MK2 S, 1100 S, 1275 sprite and other BMC engines had the same grind, if you are going to rebuild the engine why would you not get it reground?
PS the MK1 grind is a much better grind.
Graham Russell

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"It's better to be not informed than ill-informed"

Thanks Graham, I am rebuilding the engine because I bought it from an 80 odd year old who said he had rebuilt it and never ran it. The camshaft looks like it has never been used and the bearings look new, so don't I need to know the camshaft ID in order get the timing right?

That's good to know. My Mk2 also has an 1100S cam. With 73mm bore and 1 3/16" exhausts and still running the 1 1/4" SU's. The only change I made when doing the engine was fit 1.5 ratio roller rockers.
It revs well and quite nippy.

Hi cooperess
You don't need to know what cam it is to set it up,you can set it up by splitting the over lap at top dead centre by that i mean when the exhaust valve is closing the inlet valve is opening at TDC.
Just put 2 push rods in, one on number one exhaust and one on number one inlet put a dial indicator on the inlet and measure how far the inlet is open at TDC.
With out moving the motor move the dial indicator across to the exhaust pushrod set it on zero then turn the motor till the indicator stops this will tell you how far the exhaust valve is open at TDC, I like to set it up with the inlet open .010 tho more than the exhaust this will work fine.
See how easy it is clear as mud give it a go.
Graham Russell

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"It's better to be not informed than ill-informed"

As I only have a metric dial indicator I guess the reading would be 0.254mm.