From:Scott Allen
Subject:RE: RE: RE: RE: Rod Bearings Date:Thu Nov 6 20:50:41 2014
Response to:19979

Mutt, Thank you for the info. My pin does measure 1.000". The rod measures 1.245". Divide .245" X 2 = .1225" pins. It looks like the rod was honed and .121" pins put in it. it has a nice finish and is round. There is play up and down and rods won't live very long with up and down play. I will find or make some rollers. I specialize in pre 16 bikes, we are always making or using rods out of different machines, making pins and rollers. Looking in the parts book showed over size pins. I didn't know the earlier machines where different. What was the Pro-X rod for, that worked in your Hummer? Looking in there catalog, I didn't see Hummer rods.
Thanks again, Scott
Measure your crank pin. Should measure 1.000" when new.If
I remember right, I think the book says .0025" clearance.
Not sure why they need that much clearence (probably
liability issues even back then) as modern rods only run
.001" clearance. I checked a NOS late model Harley rod
assembly. The end of the rod had about 3/16" or more
shake at the small end !!! I bought a Pro-X rod assembly
for my racing Hummer. It had zero shake at the end nor
could ya twist it on the crank pin.

Harley never made oversize rollers for the late model
caged bearings. The slots in the cages would have to be
opened up .001 for the +.001 rollers to fit. As Brent
says, finding a NOS set of the bearings and cage is next
to impossible, (but I am sure if you look long enough,
someone may have one).


Thank you for the quick reply. My machine is a 63 Scat
and the pins measure .121" It has been apart before,
someone really tore the plates up. The rod and crank pin
look good, I think .122" pins would tighten it up. Does
anyone sell these oversize rollers.
Thanks again, Scott

depends on what year/ 48-60 models use .250" x .490 long
61 to 66 use .120" diameter needles

Can someone please tell me what the stock dimension is
for the crank pin roller bearings?
Thanks, Scott