S&S Cycle 106 Stroker Hot Set Up Kit For Victory Freedom Engines - Manual (Page 5)

REAR PISTON CLEARANCE
1- The rear piston must have a clearance cut in the bottom of its’ front skirt to ensure that the front and rear pistons do not contact
at Bottom Dead Center (BDC). Using the S&S
® supplied template for piston clearance cut, hold the template on the front skirt of
the rear piston as shown in Picture 7, and scribe a line on the piston skirt. Dykem ® can be used on the piston to increase visibility
of the scribed line. Once the piston is marked, it can be clearanced by holding a die grinder at a 25 degree angle to the piston skirt
face. Piston clearance should look like the piston that is shown in Picture 8.
Failure to clearance rear piston skirt will result in piston to piston contact. Small metal chips and pieces can damage machined
surfaces and block passageways. Be sure to thoroughly clean all metal chips and pieces to prevent premature failure.
Always wear eye protection while grinding and cleaning the components.
2- After rear piston is cut and cleaned it is highly recommended to assemble the crank, connecting rods, pistons, base gaskets and
cylinders into the primary side of the engine case and snug cylinders down using the two studs on the primary side of the case.
Now roll the engine to BDC or where the front and rear piston are closest together. Use a feeler gauge to measure the clearance
between the front and rear piston skirts as shown in Picture 9. You should have a minimum of .065” clearance between the two
piston skirts.
ASSEMBLE CRANKCASE
Once you have completed the assembly of S&S crankshaft and connecting rods, and performed the rear piston clearance section of
these instructions you can now refer to the Transmission & Crankshaft and Cylinder & Piston section of your Victory motorcycle service
manual for final assembly of the crankcase, pistons, and cylinders. Do not install the heads until the S&S valve springs have been
properly installed.
Picture 6
Rear piston clearance template
CAUTION
WARNING
Picture 7 Picture 8
5
Picture 9