User Manual

Q401.001

PARTS LIST

1 Main Jet DJ074

1 Main Jet DJ078

1 Main Jet DJ082

1 Fuel Needle DNO140

1 Adjusting Washer DW0001

1 E-Clip DE0001

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-2597.

1992-2001 Yamaha YFB250

Timberwolf

PAGE 1
Q401.001 1992-2001 Yamaha YFB250 Timberwolf 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-2597.
PAGE 2
Q401.001 STAGE ONE INSTRUCTIONS 1. Unscrew top carb plate. Disconect throttle cable and remove slide.(Fig. A). 2. Install Dynojet needle on groove# 3 for applications below 5000 feet, groove #2 for above 5000 feet, using all stock spacers. Install the Dynojet washer above the E-clip. 3. Remove stock main jet. Use the DJ082 below 3000 feet, DJ078 from 3000 to 6000 feet and DJ074 above 6000Feet. Be sure that the jet you are changing is the main jet. 4. Locate the Fuel Mixture Screw (Fig. B).