S&S Cycle Super Stock and Special Application Crankcases for 1936-99 Big Twin Engines User Manual

Page 11

Figure 3

Cylinder

Crankcase

Stud

Stud Collar

Stud collar may
prevent cylinder
from contacting
crankcase.

NOTE: Older S&S® Sidewinder® big bore cylinders may not fit over late style cylinder studs correctly, preventing cylinder from seating on crankcase. See
Figure 3. Interference may seem minor, but forcing cylinders down over collar may cause distortion of cylinder bore and accelerated wear. Stud holes in
S&S cylinders produced after 4-95 have been enlarged to provide adequate clearance.

Forcing cylinder over stud collar will cause distortion possibly resulting in out of round cylinder bore. Stress created by forcing cylinder
over stud may also cause cracking of cylinder, cast-in iron cylinder liner and/or damage or failure of other engine components.

Failure of cylinders, pistons and/or other engine components due to cracked cylinder may result in personal injury and/or loss of control
of motorcycle.

C- To correct fit of early Sidewinder® cylinder on late stud, perform following steps. See Figure 4.

1- Place cylinder on table of drill press or milling machine with base gasket surface up.
2- Tighten 31⁄64” drill bit in chuck and center stud hole of cylinder under drill bit.
3- Clamp cylinder securely in position.
4- Remove 31⁄64” and install 33⁄64” or 17⁄32” drill bit in chuck. Set drill press stop so drill bit will enlarge stud hole .100” to .110” deep below base

gasket surface of cylinder.

5- Carefully counter bore hole approximately .100” deep. Use fairly low rpm and slow feed rate to avoid catching drill bit and damaging

cylinder.

6- Repeat for remaining stud holes.
7- Thoroughly clean all chips and foreign material from cylinder stud holes and oil passages.

CAUTION

WARNING

Figure 4