S&S Cycle Piston and Big Bore Kits 98 and 107 for 1999-06 and 2007-14 Big Twins - Manual (Page 5)

9. Break-in Procedure
NOTES:
• S&S engines and parts are designed for high performance and are not
as tolerant of inadequate break-in. Correct break-in will assure longer
engine life and will prevent unnecessary engine damage. Engine damage
caused by improper break-in is not covered under the S&S Warranty.
• Proper engine tuning will be required in order for your engine to run
correctly and to prevent damage. Carbureted engines must be rejetted,
and a larger carburetor is recommended. EFI calibration can be changed
with the use of an S&S VFI module or other aftermarket tuner. It is
recommended to start by adding 10% fuel across the map if you do not
have a tune file for the set-up you are running. Check the S&S website for
Power Vision calibration files.
a. Initial start up. Run the engine approximately one minute at 1250-
1750rpm. DO NOT crack the throttle or subject to any loads during
this period as head gaskets are susceptible to failure at this time.
During this time, check to see that oil pressure is normal, oil is
returning to the oil tank and no leaks exist.
b. Shut off engine and inspect for leaks. Allow engine to cool to the
touch.
c. Start up engine again and allow the engine to warm up for 3 to 4
minutes. Again, do not crack the throttle or subject the engine to
any type of load. Shut down the engine and allow to cool. Repeat
this procedure at least 3 more times.
d. After the engine has cooled to room temperature, you are ready to
start the 500 mile engine break-in process.
e. The first 50 miles are the most critical for new rings and piston
break-in. Engine damage is most likely to occur during this period.
Keep heat down by not exceeding 2500rpm. Avoid lugging the
engine, riding in hot weather or in traffic. Vary the engine speed.
We recommend changing the oil after the first 50 miles.
f. The next 500 miles should be spent running no faster than 3500rpm
or 60mph. Avoid running continuous steady speeds, and do not lug
the engine, Vary the rpm. We recommend changing the oil again
at 500 miles.
g. For the balance of the first 1000 miles the engine can be run in a
normal but conservative manner. You can be more liberal with the
rpm range and the motorcycle can be operated at normal highway
speeds. Avoid overheating or putting any hard strain on the engine;
no drag racing, dyno runs, excessive speed, trailer towing or side
car operation.
h. After 1000 miles, change the engine oil. Now the motorcycle can
be operated normally.
OIL RECOMMENDATIONS
S&S® Cycle recommends the use of S&S 20W-50 synthetic or petroleum
based V-Twin Motor Oil.
Break-in can be performed with either synthetic or petroleum based
oil.
Regardless of what type of oil you select, be sure to only use oil
specifically designated for use in an air cooled motorcycle engine. If
you prefer not to use a multi-viscosity oil, utilize the viscosity suggested
for the temperature you will be operating your motorcycle in.
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