Koso Analog Tach with water Temp problems.

[mitchelljd02]

98 MAX here. I put a Koso tach on, and I used the Grey wire from the OEM lead. I'm having trouble getting the tach set right.

At idle, my clip on tach on a cylinder lead shows 1230 rpms. With the koso set for a 4 stroke 4 piston, the needle is all over the place. Same thing happens when I set it for 4 stroke 1 piston.

I can only get the needle to stay steady at 1200 when I have the setting at 2 stroke 1 cylinder. Obviously I know our bike is a 4 stroke 4 piston.

Koso describes a 2 stroke for ignition at every 360 degrees (1 rotation of the piston) and 4 stroke at every 720 degrees ( every other rotation).

Has anyone used this gauge, and how did you make it work?

Also, I've searched the forum but I can't find a thread or post with the info I need.


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[KJShover]

Which gauge is it? There are a few here that are running Koso's.
You might need to get yourself a tach adapter to smooth things out with the Vmax's wasted spark ignition.

Shoot me your address, I have one left I'll mail off to you, N/C

 

[shicks16]

Have to set it up as a 2 cylinder to cover off the wasted spark, I'm running cops and wasn't able to use the grey wire for my Koso, I ended up having to buy the Koso filter and tie wrapping it onto the cop.

 

[mitchelljd02]

Here is the gague I'm using.

@KJShover 324 Fleetwood Road, York, SC 29745

Any suggestions on a good site to buy the COPs?

 

[Traumahawk]

Here is the gague I'm using.

@KJShover 324 Fleetwood Road, York, SC 29745

Any suggestions on a good site to buy the COPs?

G makes and sells his own kits...they are plug and play. They are GREAT, I have them on my 07.

http://vmaxforum.net/showthread.php?t=24692

There is the link.

 

[mitchelljd02]

Just wanted to update.

Koso gauge set at 2 stroke 1 piston. I have the OEM Gray wire as the input.

At idle, the koso reads a little above 1K and my clip on tach reads 1250.

When cruising at 60mph in 5th, I'm right at 4K.

Everything seems to be working OK.

Thanks to everyone that responded.