Poor mans carb synchronizer

[BanditoNova]

Found this recently. Claims to be pretty accurate. For the price I think I'll try it after I rejet.

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

[Geoffwhite18]

They work pretty well. There is a link for one that does all 4 carbs at the same time. I'll try and find it!

[andrewsw]

I use the plastic tubing with water, and it's great, but you have to be fast on the kill switch. I've read that you can put a crossover between the two tubes with a valve and use that to keep it from sucking water into the carb.

I had, but have lost a link to a setup that uses tubing and glass jars with stoppers. basically, you have two jars with stoppers. the two jars are connected by a short inverted-U shaped tube that goes to the bottom of each jar. Then there is a tube that runs from near the top of each jar to a carb. You put in enough water to make it work, but *not* enough to reach up to the upper tubes when all the water gets sucked into one jar. The goal is to make the water levels even. Seems like a good plan to me, but I think there will be a lag... it will take a little time for the water to flow across, so I would think you need to adjust, wait a few seconds, adjust again...

A

[BanditoNova]

I think with a little ingenuity one could make a pretty accurate one. I found another link to a loosely written 'guide' to making one.

http://www.motorcyclephilippines.com/forums/showthread.php?p=419690

I'm gonna try it. I'll post the results when I'm done.

[Geoffwhite18]

Ok found the link to the one I was talking about. Some people use tranny fluid instead of water.

http://www.vfrdiscussion.com/forum/index.php?showtopic=16200&st=0

[BanditoNova]

  Awesome! with pics and everything

$40 - $80 for a manometer could be spent towards much better things like bike accessories, jet kits, pipes, clothing, coffees on your ride........I could go on - but I won't

[andrewsw]

not to mention that in theory you can get a better sync with water or other lighter material. An inch of water is probably a fraction of a millimeter of mercury. (I think one of those links mentions this). The real question is whether that kind of accuracy is worth anything.

[CWO4GUNNER]

The only problem using water and aquarium hoses is that the water is hard to see and bubbles interfere with a solid column due to the surface tension of water. Personally after trying one I thew it in the trash can and bought a Morgan Carb Tune. Best manometer I ever used and worth every penny for an accurate reading which takes time when adjusting.
In this case I think the Chinese proverb applies "save penny lose dollar"
http://www.carbtune.com/carbhist.html