GL1200, tach to set the carbs.

dudeboy said:

I need to adjust the carbs so I need a tachometer to set them with. autozone has one and it has two wires, the instructions tell how to hook to A coil on a car. what I don't know is how can I hook it to my 1200, I have four coils..:sadguy:

Click to expand...

I'm confused, does your 1200 not have a tach?

tach

yep it does have a tach. the tach on the bike is not that accurate to reley on for true carb setting. it could be out as much as 1k from one carb to the other.

Here is a link to Tiny Tach. It should do what you need it to do and it wont break the bank.

http://tinytach.com/gasoline.php

dudeboy said:

I need to adjust the carbs so I need a tachometer to set them with. autozone has one and it has two wires, the instructions tell how to hook to A coil on a car. what I don't know is how can I hook it to my 1200, I have four coils..:sadguy:

Click to expand...

You're talking about adjusting the fuel/air mix, right? Unless your 1200 is modified you have TWO coils, and you don't need to hook to the coils. Out of the CDI is a solid yellow wire. Connect the tach to that and a ground. When I did my carbs last it turned out that my on-board tach was remarkably accurate. Go figure, it's only 28 years old!

The Interstate tachs don't display increments fine enough for an idle drop. I picked a little tach digital up off eBay that works well enough. It's slow to register but to hook it up, you just wrap its lead around any plug wire.