Accelerator Pump System - Suzuki drz 400E Service Manual

4-8 FUEL AND LUBRICATION SYSTEM

ACCELERATOR PUMP SYSTEM

This system works only when the rider opens the throttle grip quickly as the accelerator pump sends the
necessary amount of fuel to the carburetor bore to correct the air/fuel mixture ratio. When the rider opens the
throttle grip quickly, the intake air volume increases and air velocity at the bottom of the piston valve is slow
and sucking volume of fuel is less.
The piston valve lever 1 pushes levers (2, 3), and lever 4 turns and pushes rod 5. The rod 5 pushes the
plunger 6. This plunger pushes out the fuel through the outlet pipe 7, spraying fuel into the main bore.