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Ok, so i'm getting ready to rebuild the carbs on my 84 Interstate and I know that sync is a huge thing. I'm going to buy a sync tool, but which one is more accurate? The one with the guages or the ones that are filled with mercury?



TIA
 

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1993 gl1500, 1976 gl1000
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The mercury is more accurate but not sure if they are available anymore. Motion Pro makes one to replace their mercury guages. It has metal rods instead of mercury. I used one this past weekend that belonged to a friend. Very simple and no chance to suck the mercury into the engine.
 

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I prefer gauges even though they are more delicate than the mercury or rod tyes.
 

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Gauges are cheaper. I bought two Harbor Freight vacuum gauges, stuck an aquarium air control valve in line with each one to reduce flutter and used them to sync carbs on several 'Wings. You can also build a manometer which will do the job too. I built one like the one in the link below and used it a couple times. The gauges were handier but the manometer worked fine.

http://www.powerchutes.com/manometer.asp

Here's some clever variations on the manometer theme:

http://faq.ninja250.org/wiki/How_do_I_synchronize_the_carburetors?
 

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1987 GL1200 Interstate
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I like mercury guages. They're accurate.

Wasn't there a "borrow the guage" thread here at one time?
 
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