Trail Tech Vapor

So i have bought the Vapor. I have the temp sensor, tach, speedo, and power wires all hooked up. Nice unit. However, the tack is reading 15000+RPM at idle. Anyone have this computer/problem with it?? I have been in contact with trail tech as well, but so far no luck there. I have everything hooked up as it is supposed to be, but it just is not working.

I remember lots of people with sv650's with problems with the tach too. I think they fixed it by using resistors or something. I would do some searching on svrider.com

did you remove the stock speedo?

IAmABug wrote:

So i have bought the Vapor.  I have the temp sensor, tach, speedo, and power wires all hooked up.  Nice unit.  However, the tack is reading 15000+RPM at idle.  Anyone have this computer/problem with it?? I have been in contact with trail tech as well, but so far no luck there.  I have everything hooked up as it is supposed to be, but it just is not working.

Well...I don't have the resistor tach wire so my RPM is erratic when I wire directly to the battery. Works OK when I don't connect external power. Just curious, how many wraps around the orange wire (at the spade for metal to metal contact) did you do?

Also, what method did you choose to mount the magnetic pick up for the speedometer? I can't seem to find the right tool to remove the front disc screws. Torex nor Allen. They all want to strip before turning.

Thanks

My Tach is also running high, 15000. I tried a shielded wire to replace my orange wire and its still getting stray RF from the bike. I have the wire wrapped around the coil about five times below the rubber seal. The next thing I want to try is wrapping the wire around the coil above the seal. I'm trying that today so I'll let you know how it works out.

I have my speedo sensor on my rear wheel, I didn't want that big cable running down the front fork. It does fit nice on the rear caliber.

My Tach is now running correct. I had to run the power and ground right to the battery

TwoBuells wrote:

My Tach is now running correct. I had to run the power and ground right to the battery

Went for a ride and the tach still jumps all over.
Its getting interference from the bikes electronics.
I have the tach wire wrapped around the coil five times. I'm using a shielded wire, I connect the power leads right to the battery.

Stay tuned, I contacted Trail Tech and I have a few more things to try.

So I may have a solution for you, I have a Vapor as well and had the same rpm problem.

I ran the wire pickup for tach direct to the spark plug coil wire. (Before the coil)

This does involve removing the spark coil and the contacts, strip the vapor wire, and get it all back into the coil plug housing.

Once that is done, I have the ground going to the battery as well, and then you have to change the PPM setting on the Vapor from 0.5 (I think) to 2 (I think).

The PPM settings are only 0.5, 1, and 2, so play around to see what the correct setting is.

My Rpm's only glitch is at ~7500 rpm it will jump to the off the scale for half a second, then resume perfect readings at ~7700RPM+

Hope that helps a bit.

Drannen wrote:

So I may have a solution for you, I have a Vapor as well and had the same rpm problem.

I ran the wire pickup for tach direct to the spark plug coil wire. (Before the coil)

This does involve removing the spark coil and the contacts, strip the vapor wire, and get it all back into the coil plug housing.

Once that is done, I have the ground going to the battery as well, and then you have to change the PPM setting on the Vapor from 0.5 (I think) to 2 (I think).

The PPM settings are only 0.5, 1, and 2, so play around to see what the correct setting is.

My Rpm's only glitch is at ~7500 rpm it will jump to the off the scale for half a second, then resume perfect readings at ~7700RPM+

Hope that helps a bit.

I was in contact with Trail Tech and their sending me a new Tach Cable. the one that came with my kit was only one wire, no ground. I'm getting a two wire cable.
this is what I'm going to try next

this is the way I had the tach wire installed, but with no ground wire I'm getting a lot of RF interference.
Thanks for the tips, I'll post my results when I get the other cable in the mail

This was my solution,
I had to solder the Tach Lead to the Orange wire on the connector to the coil/spark plug. Black wire to a Frame Ground. The Tach cable also has a 600 ohm resistor inline. The Power leads are connected to my battery, pos and neg. Also the Tach was set to 0.5
no more RF