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From my viewpoint everything about the cases is consistent (markings and such) for the year but obviously the left case has been modified/upgraded for the Timkin bearings.
I've got the '69 motor sprocket oil seal coming (thanks to John). In the interim, the cases are going in for a good cleaning.
Last edited by panz4ever; Mar 8, 2023 at 02:16 AM.
Right Mocasco 60 & 41....Left Mocasco 60 & 56....Pinion Shaft
Wheel width (right and left)
Rods
m
According to Palmers these are the "late" style '56-'64. There is but a singe hash mark (front piston advance timing mark) on the left flywheel so I figure that puts them at '56-'60.
Flywheels have been lightened. Stock one side would have been 2-1/8; the other 1-1/2. Both of these are 1-1/2.
Pinion shaft is 1958-1972
Motor sprocket shaft is 1956-1964
Last edited by panz4ever; Mar 8, 2023 at 02:23 AM.
No issues from the narrowing or the S&S stuff would never had worked - light wheels is also a S&S kind of thing they did a lightning from day one - send the power into the tires instead of the engine working to over come it < it will rev up quicker - it also took some load off the weaker 705 706 rods that were prone to snap
it always a good thing to confirm the case to be correct but today that is not the norm unfortunately its less then 1/2
in my shop we throw away the 705 and 706 rods as they are week and longer then the todays 7.440 when the pistons became a new pin located to the newer rod are shovel — so now pan and shovel both have 1/16 - 1/16 - 316 ring package and with the change in wrist pin location the rod stroke ratio is now 1.87 in both the RPLS rods is what i use 35 years on never found a set out of spec and are made in japan
reason - the rings on the pistons you have now should be 5 / 64 ring package and those pistons are not really available - but you could find a set we would only do the conversion just me take - every one does what they think is best
So the cylinders & pistons are/were 61ci with stroker plates to accommodate the 74 ci crank. Any reason not to switch over to 74 cylinders and pistons at this point in time?
Thanks for the photos. I see casting number 112-481 is inside the left case as I expected. DC looks like 1 0? If so it indicates casting in Jan 1950. Notice hallmark E has no circle around it and that is consistent with that time period. Casting number 112-481 was used for 194852. There were at least three Pan left cases over that period but all of them had that casting number. The area for the inner primary looked the same on all three cases but your case has been converted for a later shaft etc as I mentioned above. The next Pan left case had casting number 24541-53 and it was used for 195354 but the area for the inner primary still looked the same as 194852.
The first Pan R-H case had casting number 112-48 and it seems to have remained like that into at least March 49 casting. But as early as June 49 it began to appear like yours: 112◦◦48. I dont know why the two round indents were introduced but they then seem to have remained in the casting through at least Feb 51, apart from one small variation the previous month. DC looks like 2 0 for Feb 1950. Again notice hallmark E has no circle around it. Im sure you noticed the bushing for the cam has been replaced with a needle bearing as per 58-later. I imagine its a Torrington?
Getting back to footpegs, I didnt mention my other set-up earlier because it looks like the frame has had its tabs for footboard studs removed. But the tabs are available. I made my own footpegs out of 1/2 round steel and I put a 3/8 UNF thread at the bottom. Heres the R-H footpeg. Originally I made it longer/taller than this but I shortened it to make it more comfortable.
Looks like the front cylinder has a DC? The earliest DCs Ive seen on H-D Pan cylinders are from Jan 1950 and recently Ive been trying to find out if they appeared prior to that. Thanks.
Eric
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