Baron Air & Fuel_BIG AIR KIT PINSTRIPE, BLACK Yamaha Road Star User Manual
Page 5

Page: 5
BA-2420RD
NEEDLE/JET KIT - Yamaha Road Star (99-07)
16. Verify that the air/fuel adjustment screw has been set to a starting position as described in step #11c, and the clip is
installed as detailed in step #3.
17. Check the engine at idle speed for any popping or back firing.
IMPORTANT: Check all linkage for interference, check all hoses for kinks, check all bolts and hardware for tightness and
then check throttle action for smooth operation. If installation is done correctly you are now ready to start your bike and
perform tuning.
TUNING: Perform final idle mixture screw tuning adjustments per instructions supplied before you begin your initial
ride.
OLD SCHOOL TUNING METHOD: For checking jetting for proper air/fuel mixture once the BAK is installed and all
jetting is set - You can judge your engine for lean/rich by following these suggestions:
Clean/wipe out the last few inches of your exhaust pipes to remove as much carbon build-up as possible.
Take a 50 to 100 mile ride in varied conditions (starting/stopping, shifting through all gears, etc) just do not ride on
a highway at sustained speeds for the entire time (i.e., the riding needs to be varied).
After the ride, let the bike cool, go to the rear of the pipes.
Insert finger into the end of the pipe and with about the pressure you would use to draw a large coin across a table
rub your finger on the inside wall of the pipe.
Look at your finger and judge as follows:
Wet/Moist Dark Carbon Too Rich Suggest you drop two main jet sizes
Dark to Medium Dark to the point the ridges in your fingerprint cake up and are hard to define Too Rich. Suggest
you drop one main jet size.
Dark Grey to Light. Black where you can clearly see a well defined finger print Jetting is good do not change
Medium Grey to Light.
Grey coloring on finger Too Lean - Go up one main jet
No color on finger Way too lean Go up two main jets
After making any changes we suggest you clean out the pipes and follow the same procedure to be sure the changes
are sufficient if any jetting was altered.
FINAL TUNING: If your bike emits black smoke when revving the engine (indicating an over-rich condition),
Barons suggests adjusting the carburetors accelerator pump to a leaner setting by loosening the pumps lower
locknut and turning in the adjusting screw one turn. We have found the accelerator pumps factory setting to be
too rich on many Road Stars. Refer to Yamahas shop manual for this adjustment procedure.
Our install guides provide a basic outline on the proper installation of our products. Further tuning and/or
fitment may be required. Barons bears no responsibility on installation costs associated with this product.
© 2013 Barons Custom Accessories
5221 Oceanus Drive
Huntington Beach, CA 92649
(925)583-2499 - Ph.
(714)901-0520 - Fax
www.baronscustom.com