Automobile Parts User Manual

23801 E. La Palma Ave., Yorba Linda, Ca 92887 Ph. 714.692.8180 Fax. [phone]
www.cobrausa.com
12/04
Instruction Manual >
692
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1600
Page 3 of 4
TUNING NOTES
Typically 2 into 1 exhaust systems require one additional position, on the yellow and red pots, over
slip-ons.
ADVANCED TUNING
Your Cobra Fi2000 fuel injection module has been tested and preset for best function and rideabilty
on a stock motorcycle with a Cobra exhaust. The Fi2000 does however, have 3 important
adjustments that allow you to tune the module for optimum performance, especially if you have
performed other changes to your motorcycle. These adjustments also allow you to resolve
drivability issues if our stock settings are not exactly right for your bike. Make sure your motorcycle
is up to normal operating temperature (15 minutes of riding should be sufficient) before making any
adjustments. Remove the door to expose the pots shown in figure 4.
GREEN LED POT (left pot) - this adjustment affects idle and cruise fuel. If you have cruising
issues, this is where you would try a different setting. Generally, surging and uneven running while
cruising is a lean fuel condition, so try adding a small increase in fuel by turning the adjustment
clockwise with a small flat blade screwdriver a 1/2 of a position. Test drive the bike to feel an
improvement and only increase the setting until the surge goes away. Also, backfiring or popping
on trailing throttle is generally a lean symptom (or an exhaust gasket leak). Try the same small
increases as above just until the backfiring goes away.
YELLOW LED POT (middle pot) - this adjustment affects acceleration and power fuel. If you have a
hesitation or bogging on acceleration, this is where you would try a different setting. Aftermarket air
cleaner assemblies generally lean out fuel mixtures, so try small clockwise increases as above until
a smooth acceleration returns.
RED LED POT (right pot) - this adjustment is the top end or power fuel adjustment. Just like the
main jet in a carburetor, it starts to control fuel as you demand maximum power from your bike and
takes over completely above 4000 R.P.M. As performance gains are added to your motorcycle,
such as big bore kits, camshafts, flowed cylinder heads, etc., each component will increase the fuel
demand of the system. With the red pot turned to its maximum (10) position, the Fi2000 will cope
with nearly 100 R.W. horsepower. An all stock motor will only require a 2 position. You can
generally, if you are using quality performance engine upgrades, in a sensible combination
equate the numbers evenly from 2 up to 10 based on horsepower gains.
TROUBLE SHOOTING
If you have any problems refer to note 7 in the main body of the instructions.
DOCUMENT NO
. 0018
REV. A