Dyna Dragster Header

Dyna Shift Counter

The Dyna Shift Counter is the missing link of the chain of systems on a drag bike. The Shift Counter provides the proper interaction between the air shifter system, the ignition system, the transmission, and other systems.

Shift Counter Features:

Dyna Shift CounterThe Shift Counter consists of a small box, approximately 4" x 2" x 1", with five screw terminals on one end. Above each screw terminal is an LED lamp to indicate which terminal (or gear) is active. When a terminal is active, it is a source of 12 volts which can be used to activate other devices.

The Shift Counter must be used in conjunction with an electric switching valve on the air shift system (electric over air setup). The Shift Counter trigger input is connected to the handle bar electric shift button. When the electric shift button is pressed, the Shift Counter is triggered and rotates it's outputs to the next gear. At the time of the 1-2 shift, the Shift Counter will deactivate the 1st gear screw terminal and activate the 2nd gear terminal. During the shift the Shift Counter will generate a shift kill pulse of the selected duration to kill the ignition during the shift. The shift kill duration is adjustable between settings of 60, 70, 80 and 90 milliseconds. When the Shift Counter is used on a vehicle, an air kill switch is no longer necessary. The Shift Counter will continue to function similarly each time the shift button is pushed, rotating it's outputs on each successive shift until the vehicle is in high gear.

The Shift Counter has three shift kill modes which are user selectable: 1-2 auto kill mode, 1-2-3 auto mode, and full manual mode. The auto mode eliminates the headaches associated with the task of setting up the kill for a semi-automatic transmission.

Part Number

Description Racer Price