JIMS Box 3 1208-1353 (all models of 120, 131, or 135 Alpha, Beta and EVO Mount Engines (Including Kits) User Manual
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No.1208-1353
A Division of Thiessen Products, INC
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1. The standard (furnished) settings are normally correct when used with 2-into-1exhaust sys-
tems.
Note: Alternate exhaust systems may require different settings.
2. The standard (furnished) settings are normally correct for a "standard day" such as is common
near sea level in the summer.
• 70 degrees Fahrenheit.
• 29.9 Hg pressure
• 50% humidity
3. The Screamin' Eagle 51mm carburetor's standard settings are:
• Main Jet: 230
• Slow Jet: 48
• Jet Needle: NDKS (JET settings may need to be changed for peak H.P.)
STEP 18 : Recommended Exhaust Systems
JIMS has used many quality exhaust systems on the Dyno to do testing for the best horse power
numbers. As a result of all these tests we have found the Thunderheader Exhaust System, and the
Supertrapp 2 into one exhaust system ( using 17 disc ) gave us the best HP numbers.
STEP 19: Oil Flow, Oil Pressure And Gasket Seating, All Engines:
Important Notes:
• Before you install any new JIMS Race Kit engine in its chassis, thoroughly flush the motorcy-
cle's complete oiling system.
• Be very careful that you do not tear small slivers of rubber off the edges of the oil lines as you
fit them to the engine's oil fittings.
• Do not connect the oil return line from the engine to the oil tank. Fit a hose from the engine's
oil return fitting and run the hose into a large catch-pan.
• Note: Remove the spark plugs from the engine. Attach the plug wires to the spark plugs and
lay them on the cylinder heads to prevent damage to the coils.
• Be sure the oil tank is properly filled with the correct oil. Use the electric starter to turn the en-
gine until the oil pressure light goes out or until the pressure gage reads 10 -15 psi.
• Re-install the spark plugs, torque to 12 to 18 ft lbs., and plug wires. Depress both compres-
sion release plungers.
• Start the engine using the normal procedure outlined in the owner's manual. Allow the return
oil to run into the catch pan.
• Run the JIMS 120, 131, or 135 between 900 and 1500 rpm until the tops of the cylinders have
reached 200 degrees Fahrenheit (too hot to touch). This normally takes between one and two
minutes. Note: Do not allow the oil level in the tank to get to low while the engine is running.
Stop the engine and let it cool to room temperature. Inspect the installation for any oil or
gasoline leaks. Top – off the oil tank. Repeat the warm-up and cool-down procedure three ad-
ditional times.
Note: Watch and maintain the oil level in the tank. You may reconnect the oil return line to the
oil tank after at least two quarts of oil have been pumped into the catch pan. Discard the oil
in the pan.