User guide

Q413.001

2000-2005 Yamaha

400 Big Bear

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.

Parts List

1 Main Jet DJ104

1 Main Jet DJ106

1 Main Jet DJ108

1 Main Jet DJ110

1 Main Jet DJ112

1 Main Jet DJ114

1 Main Jet DJ116

1 Fuel Needle DNO490

1 Needle Spring DSP77

1 Adjusting Washer DW0001

1 E-Clip DE0001

PAGE 1
Q413.001 2000-2005 Yamaha 400 Big Bear 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.
PAGE 2
Q413.001 STAGE ONE INSTRUCTIONS 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. This is Groove # 1 3. Remove the stock main jet and replace with the Dynojet main jet provided.