S&S Cycle Sidewinder 3 5/8 Big Bore Cylinders for 1936–1999 Big Twins - Manual (Page 13)

13
NOTE: Rods clearanced to this dimension provide adequate clearance for strokes up to and including 5". Do not remove any more material than is
necessary to obtain required clearance.
Inadequate clearance between rods or too much clearancing on rods will cause unwarranted stress on connecting rods, rod bearings,
pistons, etc. resulting in possible failure of one or all of these parts.
C. Thoroughly clean all parts to remove dirt, filings, etc.
Burrs, dirt, filings, etc. left on connecting rod components may circulate in oil damaging other parts possibly causing engine failure.
11. Lower End Assembly (All)
NOTES:
• S&S flywheels for big twin engines with serial numbers that start with a letter or those numbered 1382 or higher are made from closed die, heat
treated, steel forgings. They do not have connecting rod thrust washers like earlier S&S flywheels, because present flywheel material is harder than
thrust washers previously used.
• S&S flywheels come with either one or three timing marks. A single timing mark represents front cylinder. On flywheels with three timing marks,
an “F” stamped by a mark means front cylinder, an “R” means rear cylinder and a “TF” means top dead center front cylinder. In both cases, when
front or rear mark is placed in center of timing hole it means that that cylinder is timed at 35° before top dead center. We recommend that big inch
engines for big twin be timed at 35° initially. See Step 12, “Ignition Timing.”
• Usually S&S flywheels are balanced before leaving our facility. Some customers prefer to do their own balancing or to have another balancing shop
do the work for them. This is acceptable in most cases. However, we have had some bad experiences with dynamically balanced flywheels that have
forced us to void our guarantee if flywheels have been balanced in this fashion.
Flywheels assembled improperly prior to being dynamically balanced may sustain irreversible damage to mainshaft and crankpin
tapers during actual balancing. S&S voids its guarantee if flywheels have been balanced in this fashion.
• Assembling flywheels, mainshafts and connecting rods can be easy or difficult. Degree of difficulty is determined by builder technique and parts at
his disposal. While S&S flywheels have been noted for their easy truing qualities, they can be difficult to true if a defective part is used that should
have been detected before assembly.
• Cleaning parts prior to and during assembly and keeping parts clean after final assembly are imperative to minimize contaminants that may
circulate in oil and shorten engine life. Many parts can be cleaned with soap and water first. Then, reclean all internal parts and gasket mating
surfaces using high quality solvent that does not leave any harmful residues. en, reclean all internal parts and gasket mating surfaces using high
quality solvent that does not leave any harmful residues. Be sure to read and follow manufacturer’s instruction label before use. Use drills and
compressed air to clean all oil passageways of dirt, filings, etc. whenever possible. During actual final assembly, recoat all internal parts with high
quality engine oil.
Manufacturing chips, dirt, and/or other contaminants circulating in engine oil may possibly damage engine components resulting in
shorter engine life and possible engine failure.
CAUTION
CAUTION
CAUTION
CAUTION