High Lifter DynoJet Jet Kit for Yamaha Big Bear 400 (07-12) - Manual (Page 2)

Fig.A
Q432.001
This is
Groove # 1
Fig.B
1. Remove the vacuum slide from the carb. Remove the stock needle & spacers, noting order of assembly
(Fig.A).
2. Install the Dynojet needle on groove #3 for applications below 3000 feet, groove #2 for above 3000 feet,
using all stock spacers. NOTE: The DSP77 spring does not have to be installed at this time. It is supplied
in case the stock spring is misplaced.
3. Remove the stock main jet and replace with the Dynojet main jet provided. If you are running the stock
exhaust, use the DJ110 below 3000 feet, DJ108 from 3000 to 6000 feet and DJ106 above 6000 feet. If you
are using an aftermarket exhaust with a quiet core baffle, use the DJ112 below 3000 feet, DJ110 from 3000
to 6000 feet and DJ108 above 6000 feet. If you are running an aftermarket exhaust with a high flow baffle,
use the DJ114 below 3000 feet, DJ112 from 3000 to 6000 feet and the DJ110 above 6000 feet.
4. Locate the Fuel Mixture Screw (Fig. B). Using a flat blade screwdriver, turn the mixture screw clockwise
until it seats, then turn out 3 turns if below 3000 feet or 2 1/2 turns when above 3000 feet.
STAGE ONE INSTRUCTIONS
Dynojet Parts
Stock Parts
Mixture Screw
Main Jet Location
Make sure this piece
is reinstalled with the
main jet.