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motion pro syncpro manometer

  • Thread starter Thread starter whiterabbitt
  • Start date Start date
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whiterabbitt

Guest
I dont know if this has been covered before but this tool is junk in my opinion.
when I got the syncpro my initial thought was that it looked cheap,and the fluid reseviors were unevenly half-filled. I had never used a manometer before so I didnt know what to expect, but any tool that is this hard to use cant be very good. the fluid sticks in the tubes and creates air bubbles and a sudden increase in vacuum can pull fluid out of the tubes. both times I have tried to use this thing i spent more time messing with the tool and cussing than everything else put together.
how can I sync my bike when the tool wont stay adjusted? constantly shaking out air bubbles and resetting the tool is tiresome and aggravating.

at any rate the bike runs better on a bench sync than after adustment with the Motion Pro Syncpro manometer. huge waste of time and money.
I think I will be getting a morgan carbtune soon
 
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I wholeheartedly agree with your entire assessment. Every word. Have a Morgan Carbtune now and am much happier with that.
 
Now that they can't use mercury in carb stix, the new ones are pretty much worthless, as you've reported.

I've had a set of MotionPro mercury-filled carb stix for about twenty years now, and they still work fine.
 
Griffin said:
Now that they can't use mercury in carb stix, the new ones are pretty much worthless, as you've reported.

I've had a set of MotionPro mercury-filled carb stix for about twenty years now, and they still work fine.
Click to expand...

Totally agree with you. My mercury type carb stix is great. Ray
 
While the Carbtune is defiantly a better built product, I used the Motion Pro unit several times before I got my Carbtune and it worked just fine.
Just did the calibration as instructed and synced my carbs...never had the fluid get sucked out either...

So...don't know what the problem is fellas....:confused:
 
I think that, from the factory setup, if you start very close to sync'd with a well-running motor and are careful that it's probably OK. If your bike stalls or there are any unexpected changes - which are far more likely to happen if you're not starting off with a near sync condition - then you run a much higher risk of losing fluid and/or developing bubbles. Once you lose fluid it's pretty much over. I tried using a refill kit with my friends' but it was just never the same. It's the air that's trapped under the screws, over the fluid, that needs to be just right.

Much, much happier with the CarbTune at roughly the same price.
 
I tried one of these with a good bench synch, and it was useless. Three of the tubes shot to the top of the gauge and could not be lowered. The fourth barfed up all of its fluid.

Motion Pro explained that the vacuum pull on older bikes is sometimes too high for the tool. They did send me some new fluid to try over. Instead, I doubled down and got a CarbTune. Should have done that in the first place, because it works like a charm.
 
+1 on the carbtune2. I have one to synch my vmax carbs. its about a 10 minute job on that bike.
 
The sync tool I have is blue, with 4 circular gauges on it, paid like $60 at a local Yamaha shop.
(I see it on YouTube a lot....pretty common I guess)

The hoses that come with it, are complete JUNK....I greased them all, and they still cracked....hadda goto Lowes and buy all new hoses the First year I owned it.

Even the Metal Threaded Inserts are junky.....

The gauges work good, but that's about it.....
 
I completely agree, spent this last weekend cursing out mine. First time out, all the fluid was immediately sucked into the tubes and some into my engine. Got the refill kit, did it meticulously, SAME PROBLEM. Very frustrating. That's good to hear that older bikes have higher vacuum and can pull this out b/c I was starting to lose my mind trying to figure out what I did wrong... I guess it's a carbtune for me too...
 
Yeah, played that game already, turned them ALL THE WAY OUT and it STILL happened! Very frustrating to say the least.
 
I figured that was the case but just in case it wasn't, I posted it.
 
Yeah, thanks anyway though. Is it true that older bikes have higher vacuum like the person above said? I had my RPMs down around 1100 when it sucked the fluid out both times (with the screws turned all the way out counter-clockwise). I just ordered a carbtune, there goes $100 I wish I had better spent. The things we do for these bikes...
 
dieselhead said:
Yeah, thanks anyway though. Is it true that older bikes have higher vacuum like the person above said? I had my RPMs down around 1100 when it sucked the fluid out both times (with the screws turned all the way out counter-clockwise). I just ordered a carbtune, there goes $100 I wish I had better spent. The things we do for these bikes...
Click to expand...

You do have the restricters in the tubes, correct?
I never had mine even come close to sucking out the fluid.
 
????? You did remember to plug the petcock vacuum ? that will screw up the readings making it impossible to sync
 
Baatfam said:
You do have the restricters in the tubes, correct?
I never had mine even come close to sucking out the fluid.
Click to expand...

Me neither. That would be a LOT of suction.

The restricters (also called 'snubbers') will not change the reading, simply slow down the response of the manometer, to even out the bouncing around. I don't have a Morgan (one on order), but I bet it also has restricters built into it.

NOTE: You CANNOT use water in place of the mercury (or the mercury 'substitute') in the Motion Pro or the Morgan. The suction is simply too high. Not saying anyone has done that - just a piece of advice in case you were thinking about it. :rolleyes:
 
My antique Motion Pro uses 4 vacuum gauges! Works the same, issue free, every single time! Ray
 
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