If you'll notice, my throttle body lever is bent with an offset, so that it fits within the recess in the stock throttle cable rotary arm. My throttle arm is .060. I removed the stock lock washer & used a star washer, which is much thinner than the stock washer. I reused the stock nut.
I mounted my cruise control the way I did so that i could access the dip switches easier. I had to move the wire attachments for the heated grips. I still have room for the heated grips controller & I can get the radiator cap off if I have to.
For the speed signal, I tapped into the VS wire near where it goes into the ECM. It's the white wire w/black stripe (#A10) on the Black connector. I used a X4 frequency divider between the VS wire and the Rostra unit. I was never able to actually determine the "pluses per mile", but it's somewhere in the neighborhood of 70,000 to 75,000. The VS signal is picked up off of the counter shaft 4th gear, which has 27 teeth and the engine turns 3250 @ 60 mph. 27 X 3250 = 87750. If I knew the gear reduction between the engine crankshaft & the counter shaft, the exact pulses per mile could be calculated.
I also tapped onto one of the coil driver wires (#A26, A27, or A28) for the RPM signal. This won't give the Rostra unit the exact RPM, but it doesn't matter, because the Rostra unit monitors the "rate of RPM change" for safety purposes if the clutch is pulled in or the transmission is knocked out of gear somehow.
The dip switch settings I used are based on the length of the lever arm and the relative angle that I used as it's attached to the throttle body. My arm has a C-C of 1-1/2" & the angle would be about 4:30 on the clock.
Gain: low
Pulses/Mile: 19,300
Engine/set up: 4 cylinder low
VSS Source: Square wave
Tranmission: Manual
Control Sw: Open
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Originally Posted by MSGT-R
