Aftermarket speedometer / instrument gauges install how-to
OK, just got a pm with a question about acewell speedometer hook-up, so I thought I'd post a general how-to as a reference for anyone who might happen to want to do this in the future... It's a cheap alternative for anyone who damages their stock unit, or who is going for a more simplified look on the bike.
I am posting with information on an Acewell 2853 aftermarket gauge from electrosport ($120), you could also apply this infomation to a veypor, vapor, or trailtech etc.
Wiring an aftermarket speedometer is easy once you know a few things. On an 02-03 bike
speedometer hook-up: pink/green (connect to green wire on acewell)
tachometer hook-up: yellow/green (connect to yellow wire on acewell)
unswitched power: red/green (connect to brown wire for clock power)
ground wire: green and green/black wires(connect to 2 black wires on acewell)
fuel gauge: this is the most complicated. The fuel sensor is a thermistor, which changes its resistance based on whether the fuel sensor is submerged in gas or not. The change in current is enough to trigger a relay. Go to radio shack and buy a single pose single throw (SPST) automotive relay.
fuel sensor: brown/black (connect to pole 85 on the relay)
fuel sensor ground: black/brown (connect to pole 86 on the relay)
switched 12V power: brown (connect to pole 87)
(now connect pole 30 to the light input you want to use on the aftermarket gauge, for the Acewell I used the light blue hazard light wire)
now the fuel sensor thermistor lowering resistance will throw power to the aftermarket gauge light input.
everything else is very straightforward
left turn = orange (connect to orange on acewell)
high beam = blue (to light green on acewell)
neutral = light green/red (to purple on acewell)
oil = blue/red (to gray on acewell)
right turn = light blue (to white on acewell)
switched power = brown (to red on acewell)
a bonus on the Acewell is you can use the Acewell fuel meter as a coolant temp gauge. You cannot use the Acewell fuel meter as an actual fuel meter for technical reasons. Just connect the green/blue wire from the Honda to the blue wire on the Acewell. I put a 25 ohm resistor in-line in this connection but this may not be necessary.
OK now you need to compensate for the fact that the Acewell cannot keep up with the 70 signals per wheel rotation put out by the Honda speed sensor.
You do this with a speedo healer: (thanks to tpirman)
SH Calibration Value to be stored: -90.0%
SH Conversion mode Value to be stored: 0
- the ignition must be OFF
- set ALL SH switches ON
- turn ON the ignition
- press the button => memory cleared
- set ALL switches OFF EXCEPT #4
- press the button 9 time(s)
- set #4 switch OFF => all data stored in Flash.
Now set your aftermarket gauge wheel diameter to 267 mm. Also set your tach sensor rotations per signal to 0.5
The acewell can be mount with a stanley mending plate frome home depot, two bolts (probably 8mm), and a nut.
Last of all check to make sure your fuses (especially your fan fuse) are still intact after the install.