Q406.002 1993-2001 Yamaha YFM350X Warrior

STAGE 1

For mildly tuned machines using the stock airbox, with stock or aftermarket filter. May also be used with a good aftermarket exhaust system. K&N Filter # YA-4350.

STAGE 2

For mildly tuned machines using modified airbox, with stock or aftermarket filter. May also be used with a good aftermarket exhaust system. K&N Filter # YA-4350.
PARTS LIST 1 Main Jet Main Jet Main Jet Main Jet Main Jet Main Jet Main Jet Main Jet Main Jet Main Jet Main Jet Main Jet Fuel Needle Adjusting Washer E-Clip DJ128 DJ130 DJ132 DJ134 DJ136 DJ138 DJ140 DJ142 DJ144 DJ146 DJ148 DJ150 DNO240 DW0001 DE0001

Q406.002

STAGE ONE INSTRUCTIONS

STAGE TWO INSTRUCTIONS

You must modify your airbox lid to run stage two settings. 1. Remove top carb plate. Remove the slide lift arm screw and the two needle plate screws. Flip the linkage forward and remove the slide (Fig. A). 1. Remove top carb plate. Remove the slide lift arm screw and the two needle plate screws. Flip the linkage forward and remove the slide (Fig. A). 2. Install Dynojet needle on groove#4 for applications below 5000 feet, groove #3 for above 2. Install Dynojet needle on groove#4 for applications below 5000 feet, groove #3 for 5000 feet, using all stock spacers. above 5000 feet, using all stock spacers. 3. Remove stock main jet and replace with Dynojet main provided. If you are running the stock exhaust use the DJ134 below 3000 feet, DJ130 from 3000 to 6000 feet and DJ126 3. Remove stock main jet and replace with Dynojet main provided. If you are running the above 6000 feet. If you are running an aftermarket exhaust, use the DJ136 below 3000 stock exhaust use the DJ146 below 3000 feet, DJ142 from 3000 to 6000 feet and DJ138 above 6000 feet. If you are running an aftermarket exhaust, use the DJ148 feet, DJ132 from 3000 to 6000 feet and DJ128 above 6000 feet. Be sure that the jet you below 3000 feet, DJ144 from 3000 to 6000 feet and DJ140 above 6000 feet. Be sure are changing is the main jet. Discard the plastic cup that is on the stock main jet. that the jet you are changing is the main jet. Discard the plastic cup that is on the stock main jet. 4. Locate the Fuel Mixture Screw. Using a flat blade screwdriver, turn the mixture screw clockwise until it seats, then turn out 2.5 turns. 4. Locate the Fuel Mixture Screw. Using a flat blade screwdriver, turn the mixture screw clockwise until it seats, then turn out 2.5 turn. Fig. A This is Groove #1. Remove this cover to inspect accel pump
Remove slide plate screws
Your airbox cover should look like this when properly modified. Make sure not to cut the airfilter retainer groove. Remove stock snorkel.
Remove screw and lift arm Fig.B NOTE: Make sure that your accelerator pump is working properly. If it is not, check the rubber boot on the accelerator shaft to make sure it is pushed down below the ridge.

Fuel Mixture Screw

This boot is located under the cover on the left hand side of the carburetor.