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Old 06-26-2013, 07:09 PM   #1 (permalink)
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Default GL1200, tach to set the carbs.

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..
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Old 06-26-2013, 09:58 PM   #2 (permalink)
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Originally Posted by dudeboy View Post
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..
I'm confused, does your 1200 not have a tach?
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Old 06-26-2013, 10:04 PM   #3 (permalink)
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Default 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.
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Old 06-27-2013, 12:11 AM   #4 (permalink)
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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
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Old 06-27-2013, 02:15 AM   #5 (permalink)
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Originally Posted by dudeboy View Post
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..
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!
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Old 06-27-2013, 02:26 AM   #6 (permalink)
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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.
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