wheel speed sensors on dl1

[zx10r14]

i've connected the rt sensors to a motorbike and wired them into frequncy 1 and 2 on the dl1.
what numbers do i have to put into the frequncy channels?
how do i st it up to read the correct speed?
the rear wheel is going of the brake disc bolts, as is the front, the rear wheel has 4 bolts and the front has 5.
i'm getting some high figures when i spin the back wheel and the figures don't come back down to 0.
any help is greatly appreciated.

[TopSport]

Hi,

Firstly you have to know your tyres diameter. Then just make two new user defined variables on Analysis software. Go -> Data -> Variable Manager -> User defined variables. If you are using hertz for freq 1 and 2 and you want to see your speed in kph, then the formulas should look something like below.

Front_Speed: (VAR_0300/5)*3.14*front dia*3.6
Rear_Speed: (VAR_0301/4)*3.14*rear dia*3.6

Where VAR_0300 and 0301 are your frequency channels and diameters are in meters.

[osborni]

After doing the formula, you may want to go for a drive and compare the GPS speed with the wheel sensor speed to ensure they are calibrated properly.

You can also calculate the tire diameter by going for a GPS measured distance and turning on pulse counting. Easy to get pulses per km or mile.

(assuming your moto is street legal that is)