Throttle Body Sync.

[Unicycle52]

I have put 6K on my 04 since the "ticking" repair was done in May. (All went very well with that, new head all new valves, guides etc.) I feel a need to do the tbs and I planned on using the old "carb sticks" (the glass tubes with the mercury reservoir) I mentioned it to the mechanic that worked on my bike last night and he mentioned that the carb sticks loose their accuracy over time because of air bubbles in the merc. tubes etc. Has anyone else heard of this. I have been using the same carb sticks for 20 years (for the last 14 years on several Concours I have owned) Just looking for some input!

Unicycle52

 

[radman]

He's correct. A Morgan Carbtune is the preferred device.

https://www.carbtune.com/

 

[RTSR1/FJR]

Yeah, thats what mine did! I purchased the "Morgan Carbtune", but have yet to use it. Just have to find the time. Seems like a nice piece though. We'll see!

 

[radman]

Nicest thing about the Morgan is no fear of mercury intake. Never happened to me with the Motion Pros, but the thought was always there. The Morgan is nicely damped, a solidly built unit.

 

[RTSR1/FJR]

Nicest thing about the Morgan is no fear of mercury intake. Never happened to me with the Motion Pros, but the thought was always there. The Morgan is nicely damped, a solidly built unit.

over the 25 yrs. I had the carb stick, never sucked any mercury either. Just separation of the mercury is all. I'm sure I'll like the Mogan Carbtune. Have some old Hondaline Sync gauges also, but never did like those!

 

[radman]

Yeah, I figured I can dump $12 large on a bike, I can dump a hunnert bucks on a balance gauge. I mean, the 'ol lady was already pissed, might as well get it all while I can in one shot....

 

[markjenn]

My carb stix developed air pockets in the tubes. But they worked fine for ten+ years and you should be able to see the problem if it occurs.

Now using the Morgan and like it. Easy to read and storage is simple.

- Mark

 

[daviddowns2000]

With the Motion Pro synchronizer, water and/or fuel condensate can form in the columns over time. Then, bubbles appear or the mercury separates in the column. The fix is to simply use a syringe full of air to blow all the mercury and condensate back into the reservoir. The condensates are very light, will float on top of the mercury and not appreciably affect accuracy. Another reason there may be separation in the columns is that the mercury reservoir is low, like from spills or from having the mercury sucked into the engine. When it gets to that point, the remaining mercury will probably get sucked into the engine soon. Motion Pro sells replacement mercury. Not familiar with the Carb Stix unit, but the same thing probably applies.

 

[Toecutter]

I think the best feature I would benefit from with the Morgan unit is portability. I could never transport my Motion Pro on the bike to do sync work in the slow evening hours while at work. Gonna add one to my wish list, somewhere behind Russell saddle and Total Control clinic.