Which is better, fluid type or vacuum gauge setup?
"You don’t need to tell me the horror story about your uncle’s buddy who wiped out his chopper while drag racing at some hooligan rally. That just makes me wish I were talking to your uncle’s buddy instead of you. He sounds pretty cool."
Originally Posted by JalopySiR
BWAHAHAHAHAHA!! This time I was laughing at you. Sorry.
Ok, I don't completely understand your setup, can someone explain the setup, I need to sink 4 carbs so I assume I would need 4 tubes with a ruler for each, but what are the other ones in your pic? Does anyone know where I can download a how-to to make what you have, and then be able to sink the carbs correctly?
You can use a 2 sync carb tool for a 4 cylinder.. there is a sequence of which ones you tune in a specific order. Guessing 1&2, then 3&4, then 2&3, then rechecked 3&4 and 1&2Originally Posted by throttlejunkie
I think liquid is better. It will show more smoothly. A vacuum gauge will bounce around(not too much or there is else going on) making it hard to read.
I have a Motion Pro sync tool. You have to follow the directions to a "T". It's picky about having the proper amount of fluid in it. I've done a few bikes and it has worked fine for me. A friend has a true set of mercury sticks and does not like my set-up.
The sequence for adjusting will be different on different bikes. It depends how the throttles are hooked up. I did my 76CB550 which has a center pull cable and had to work from the inside out. My Ducatis go from the front to the back. I've done a couple that had separate cables for each carb and those don't matter what order you do it in.
What ever the set up, you are not trying to measure actual vacuum, just make them all the same at the same time.
Last edited by timmyho414; 06-22-12 at 06:42 AM.
Tim
LRRS #44
Superbike Services 44
I have tried to balance a 4 cylinder using a DIY setup like that. To call it an exercise in frustration is an understatement. I would buy a 4 position setup like the Motion Pro SyncPro or pay someone else to balance. I wound up paying someone else.
i still have this: New Carbtune Pro 2-col + Toolpouch
if you're interested, make me an offer, i have no use for it.
Beta 200RR
I have a twin max vacuum setup. Has always worked well for me. There's an adjustment knob to tune out most of the needle bounce.
I've got the MotionPro SyncPro - I've only used it once, but it worked exactly as advertised.
I have a mercury type for 4 cylinder bikes. If you feel like cruising to narragansett, RI you can sync them up at my house in about 1hr. All you need is some tube adapters to thread into the carb/throttle body boots to attach to tubes on the sync tool
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