Cylinder casting dates

Information on the identification and numbering of frame, motor belly, transmission and other parts
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1950Panhead
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Re: Cylinder casting dates

#121

Post by 1950Panhead » Sun Feb 20, 2011 2:41 pm

There is a pair of 74" knucklehead cylinders on Ebay.
G 19-0 = July 19 1940, J 25-1 = October 25 1941.
FL started in 41, I guess cylinders could have been cast in July 40.

Second photo is K 25-8, K 26-8 reported to be 1938 cylinders.
Jerry
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Robert Luland
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Re: Cylinder casting dates

#122

Post by Robert Luland » Mon Mar 21, 2011 12:59 am

Here some good shots of the cylinders with the casting thingies on the base. Bob L
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BCOWANWHEELS
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Re: Cylinder casting dates

#123

Post by BCOWANWHEELS » Mon Mar 21, 2011 7:24 am

BOTH OF MY CYLINDER ARE 1959, HOW FAR CAN THESE BE BORED OUT WITHOUT PROBLEMS AND CAN THEY BE RESLEEVED BACK TO STD ?

Cotten
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Re: Cylinder casting dates

#124

Post by Cotten » Mon Mar 21, 2011 12:55 pm

Bob!

Properly performed,
an OEM cylinder bored to .100" oversize is still stronger than a sleeved cylinder.

Sleeves are larger, compromising the matrix casting's strength further, and add distortion along with a heat barrier.

....Cotten

BCOWANWHEELS
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Re: Cylinder casting dates

#125

Post by BCOWANWHEELS » Mon Mar 21, 2011 7:28 pm

I KNOW ALL THE CHARISTICS OF SLEEVES AS I VE BORED AND INSTALLED A BUNCH OF THEM. WHAT I WAS WONDERING IS HOW FAR CAN MY 1959 PAN CYLINDER BE BORED OUT AND WHEN THE FINAL BORE IS USED UP CAN SLEEVES BE INSTALLED TO BRING THEM BACK TO STD. I,VE NEVER DEALT WITH H/D ENGINES ALOT.
BOB

Cotten
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Re: Cylinder casting dates

#126

Post by Cotten » Mon Mar 21, 2011 8:13 pm

BCOWANWHEELS wrote:I KNOW ALL THE CHARISTICS OF SLEEVES AS I VE BORED AND INSTALLED A BUNCH OF THEM. WHAT I WAS WONDERING IS HOW FAR CAN MY 1959 PAN CYLINDER BE BORED OUT AND WHEN THE FINAL BORE IS USED UP CAN SLEEVES BE INSTALLED TO BRING THEM BACK TO STD. I,VE NEVER DEALT WITH H/D ENGINES ALOT.
BOB
Bob!

Let me try to be more clear:

Pistons are available to .100" over standard.

At .060" over, cylinders benefit from applying torque-plates when fitted. At larger over-bores, they become manditory.

The minimum outside diameter of a sleeve far exceeds a .100" over-bore, and applying torque-plates remains prudent for those as well.

....Cotten

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Re: Cylinder casting dates

#127

Post by BCOWANWHEELS » Mon Mar 21, 2011 8:44 pm

THANKS COTTEN JUST WAT I NEED TO KNOW.
REGARDS
BOB

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