1.　The below calculated using following formula:  Tire Diameter (inches)x 25.4(mm/inches) x 3.1416 =  wheel circumference (in mm).
2.　Identify the tire size of your ATV when you need to change different tire size and key in the corresponding number shown in the following

1. Push and hold both MODE&RESET buttons for 2 seconds to go into the unit-setting screen.
2. It displays KM/H or M/H, each press of RESET button converts unit.
3. Press MODE button for 2 seconds to complete the unit setting and re  turn to main screen.
4. Automatic reversion to main screen if no button operation for 20 seconds.

1.　Push and hold both MODE & RESET buttons for 2 seconds to go into the　unit- setting screen.
2.　It displays KM/H or M/H, each press of MODE button confirm a  setting data, press MODE button until wheel circumference setting screen appears. (Dependent on different models)
3.　In “cXXX” display, “c” means “Circumference”, following 4  digits is circumference of original tire; flashing digit is digit to  　　be reset.
4.　Press RESET button to increase flashing digit by one; press MODE  button to confirm digit setting and jump to next digit.
5.　Press MODE button 2 seconds to complete the setting and return to main screen.
6.　Automatic reversion to main screen if no button operation for 20 seconds.

1.　Push and hold both MODE & RESET buttons for 2 seconds to go into the unit- setting screen.
2.　It displays KM/H or M/H, press MODE button many times until the tachometer setting screen “RPM r1XX00” appears.
3.　The flashing digit is digit to be reset, press RESET button to increase flashing digit by one; press MODE button to confirm digit setting and  jump to next digit.
4.　Press MODE button 2 seconds to complete the setting and return to main screen. Automatic reversion to main screen if no button operation for 20 seconds.
5.　Press MODE button to go to the RPM screen; pull on the gas until the desired shift warning RPM.
6.　Press RESET button to confirm and set up the shift warning RPM.
7.　Bar-graphic tachometer and a LED will flash to warning you shift gear.
8.　Operate from item 5 to 7 to re-adjust the shift warning RPM.

You have 2 ways to setup the shift warning RPM, one is from item 1 to 4 and another is from item 5 to 8.
1.　Push and hold both MODE & RESET buttons for 2 seconds to go into the unit- setting screen.
2.　It displays KM/H or M/H, press MODE button many times until the tachometer setting screen “RPM r1XX00” appears.
3.　The flashing digit is digit to be reset, press RESET button to increase flashing digit by one; press MODE button to confirm digit setting and jump to next digit.
4.　Press MODE button 2 seconds to complete the setting and return to main screen. Automatic reversion to main screen if no button operation for 20 seconds.
5.　Press MODE button to go to the RPM screen; pull on the gas until the desired shift warning RPM.
6.　Press RESET button to confirm and set up the shift warning RPM.
7.　Bar-graphic tachometer and a LED will flash to warning you shift gear.
8.　Operate from item 5 to 7 to re-adjust the shift warning RPM.

1.　Push and hold both MODE & RESET buttons for 2 seconds to go into the unit- setting screen.
2.　It displays KM/H or M/H; press MODE button many times until the tachometer specifications setting screen “RPM SPC-X.X” appears. 　　It means the engine rotates how many turns to output a signal.
3.　There are 4 options: 0.5, 1.0, 2.0 and 3.0. Each press of RESET button changes the 4 numbers in a loop sequence. 4.　Press RESET button until desired number then press MODE button 2 seconds to complete the setting and return to main screen.
5.　Automatic reversion to main screen if no button operation for 20 seconds.

1.　The LCD display is slow when temperature below 0℃/32℉.
2.　The data does not lose in operation temperature when display is slow.
3.　Unit will return to normal state when the temperature rises.

Please check if the speed sensor and magnet relative positions are correct.

Reed speed sensor installation position