JIMS Twin Cam 120, 131, 135 - Manual (Page 7)

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O Ow wn ne er rs s M Ma an nu ua al l f fo or r a al ll l J JIIM MS S e en ng giin ne es s 1 12 20 0,, 1 13 31 1,, & & 1 13 35 5 O Ow wn ne er rs s M Ma an nu ua al l f fo or r a al ll l J JIIM MS S e en ng giin ne es s 1 12 20 0,, 1 13 31 1,, & & 1 13 35 5
9 9 6 6
free battery for the correct model application.
Battery Cables:
JIMS recommends Super Flex performance battery cables because of the ma-
terial quality of the cable and eyelets and flexibility. See JIMS catalog for a full
model selection.
Starters and RIng and Pinion gear sets:
If your starter can't handle that big inch engine or is just plain worn out see JIMS
New 2013 catalog for our selection of Performance High Torque starters. We
also offer High Torque Starter Ring and Pinion Gear Sets to help take the stress
of your starter.
Washing out complete oiling system:
Before you install your new JIMS Race engine in its chassis, thoroughly remove
and wash out the complete oiling system. This includes removing all parts that
oil has passed through; oil tank, oil cooler and oil lines. Make sure the entire oil-
ing system is clean. If you are fitting your new JIMS Race engine into a chassis
that has been used, be sure to completely clean the oil tank together with all
lines and fittings leading to and away from the engine. If the old engine has
more than 20,000 miles of use, or, if it has suffered any unusual wear, dismantle
the oil pan and hoses and thoroughly clean them.
Be very careful 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.
Some Pre Start Information:
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.
TWIN CAM EVO Mounted Engine Installation:
Remove any paint from the motor mount pads on frame. If installing in an
FXST (Softail), bolt down the rear engine mounts first. The rear engine case
mounting holes have been optimized so the installation of the rear bolts can
be performed with assembled engine. Install top motor mount per Harley–
Davidson’s service manual for the year and model you have. After Torquing
the rear engine bolts, check the clearance (gap) between the front engine
mount and the frame. Shim front engine mount to within .010 of an inch with
shim stock.
TWIN CAM EVO Mounted:
Recommended Rear Engine Mounting Hardware:
H-D Part No. 3528 rear motor mount bolt 3/8"-16 x 3-1/4" used on 1991-98
FL, FXR, FXD, and 99 FXR.
H-D Part No. 3512 rear motor mount bolt 3/8"-24 x 3-1/4" used on 1991-99
FXST.
H-D Part No. 6019 washer 3/8" x 29/32” x 1/16” 1991-96 FXST and 1991-98
FL, FXR, FXD, & 99 FXR. For 2006 to present Dyna's or 2007 to present FL's,
remove the three red shipping plugs before attaching the transmission. If
you neglect to remove these, you will not have oil pressure and will damage
Application Information for EFI engines or carbureted models.
Use JIMS Air Cleaner Billet Backing Plate Kits with built in breather system. It is
compatible with stock H-D outer air cover. The other option is to see your local
H-D dealer for a selection of Screamin’ Eagle air cleaner kits. If you are using one
of these kits be sure to follow the instructions provided by the manufacturer.
Recommended Carburetor and Settings:
JIMS recommends using the Screamin' Eagle Super Bore 51mm CV carburetor
kit No. 27928-07A. It requires ordering separately the Screamin' Eagle manifold
kit No. 29414-07. If carburetor tuning is required order Screamin' Eagle 51mm
tuner kit No. 27432-02. Order all all separately from a H-D dealer.
Note: For carburetor settings refer to manufactures instructions. Additional re-
lated instructions will come from the ignition programing system you choose.
The following info relates to usage of the Screamin' Eagle Super Bore 51mm
CV carburetor kit No. 27928-07A using Screamin Eagle Ignition No. 32124-
04.
1. The standard (furnished) settings are normally correct when used with 2-
into-1exhaust systems.
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.)
Recommended Exhaust Systems:
JIMS has tested exhaust systems on the Dyno for the best horse power num-
bers. As a result of all these tests, we have found the Thunderheader Exhaust
System and the Supertrapp 2 into 1 exhaust system (using 17 discs) gave us the
best HP numbers.
Recommended Oil, Filters and Spark Plugs:
For pre-start oil, you can use any good quality oil that has been designed for
air cooled roller bearing engines. After heat sinking engine, use an oil that is
mineral-based, like H-D 360. If your riding ambient temperature is above 40 de-
grees F, you can use SAE 20-50 oil for the first 2000 miles. Use 32329-97 Spark
Plug, 6R12PP Double Platinum, and 12mm gap at .038 to .043.
Tuning Factors- The Air: Changes in air pressure, temperature and humidity all
have effects on the air/fuel mixtures, power output, and engine temperature.
At a constant altitude, such changes are small and generally not as important
in day-to-day operation. Changes in altitude cause the effect to become more