Healtech eSync tool- synchronize balance throttle bodies

[PowerDubs_imp]

Hi guys,

I was recently reading a thread where someone was talking about the smoothness of the bike (I think it may have been Dave) and he mentioned wanting to sync the throttlebody assembly.

There was a mention that the manual says not to do so. I would agree- for most people there is probably not much of a need if your bike is running well enough to your liking.

That being said- lots of other bikes have this procedure as part of normal maint.

Our bikes use the same throttle body design as many many other Honda bikes- just with different butterfly / bore size- and spacing between the cyl pairs. Example - the CB1000R and CB900F Hornet ( 919 )

Heck- even the Honda scooter uses the same design- so this procedure would be essentially identical once you get into the bike plastics / tank.

Example pics-

https://www.ebay.com/itm/11-12-13-14-15-...SwCXVeMRdC


https://www.ebay.com/itm/13-Honda-CB1100...Swxr1fRp61


I started thinking about it- and was curious as our staggered cam timing should show up on the results.

Additionally- although the TB are synced from the factory, as the engines wears- differences in valve adjustments from cyl to cyl will have an effect on individual cyl readings.

Naturally adjusting all the valves back to equal will even out pulses- but I suppose it depends on how deep into a 'tune-up' a person wants to go.


I started watching youtube videos on guys syncing motorcycle TB and found this modern digital version of the old mercury tubes-

https://www.healtech-electronics.com/products/est/


Here is the video of it in use-


https://youtu.be/xxJxG95IuFs

















I was particularly interested in this last screenshot. Due to the electronic sensors- this tool allows much more visual data info and much finer adjustment resolution.

There is another video of a guy adjusting with a similar, but older and much more basic (inferior) type of tool- and it is cool that you can tell if the engine has a bad valve by watching the readout.

Given I have installed custom cams, and in doing so I had to completely change my shim sizing much further than normal- it will be interesting to see the waveforms in real time.

I also may have slight differences due to my dremeling of my velocity stacks- and will most certainly want to take a look at what is going on if I decide to install the CB1000R 36mm TBs.

There was another guy here who took out the factory mis-timed cam and now is running all even cams.... I would think he could certainly benefit by using this tool to see how the cyls are running in comparison to each other and adjust if needed.

So- being the moto geek that I am- I reached out to the manufacturer, let him know I am interested in this tool, and he was kind enough to off me a discount in return for writing up my impressions and results.

I purchased the unit about an hour ago...it will take a while to arrive, and I'll probably play with using it some time this winter as time allows.

[dave]

Hi Powerdubs. Yes, I posted (a long time ago) about the synchronization, and included a picture of the meter readings. I did read in the manual that the throttle bodies should never be adjusted, so I did not do this. I performed the TPS reset, and this cleared up the situation I was experiencing - which in my experience on carbureted bikes is related to incorrect carburetor synchronization. Thank you for the great post. Looking fwd to reading the results you obtain with your new meter.

[jtopiso_imp]

Interesting. I worked with a guy who claimed that in his youth he tuned his alfa romeo 33 (4 carburators) with a make-shift rig made of plastic tubes and plastic bottles. Water instead of mercury, of course

Regarding this tool: I don't get it: don't all 4 vaccum tubes go to a single MAP sensor? Won't pressures be equalized no matter what? I think I don't get what's really going on on the TBs and those vacuum tubes.

[PowerDubs_imp]

Yes- there are crude ways to measure vacuum- there are videos on youtube of home-made rigs.

The TB are tied together- I will need to sit down and think about how and where to tap into them.

Luckily I have not only a spare set of CB1100 units- but also the CB1000R units so I can play on a bench.

Hi Powerdubs. Yes, I posted (a long time ago) about the synchronization, and included a picture of the meter readings. I did read in the manual that the throttle bodies should never be adjusted, so I did not do this. I performed the TPS reset, and this cleared up the situation I was experiencing - which in my experience on carbureted bikes is related to incorrect carburetor synchronization. Thank you for the great post. Looking fwd to reading the results you obtain with your new meter.

Hi Dave. Do you still have your results? I wonder if your readings match the cam timing differences.

[Lord Popgun]

I have an electronic sync tool too! Can't remember the maker but it was one recommended on the ST1300 board. I'll look when I get home. I think I like the looks of the HealTech better.

The ST greatly benefits from being sync'd properly although it is a PIA to do on that bike.

[dave]

Hi Dave. Do you still have your results? I wonder if your readings match the cam timing differences.
[/quote]

Hi PD, yes, I still have the picture of the meter reading I initially took - before doing the TPS reset. I can email these to you if you would like. Unfortunately, I never preformed the test after the TPS reset. Can I attach a picture to the private messages?

[Lord Popgun]

I am looking at my tool and it is a The Digi Sync digital peaking manometer Model DS1+

It doesn’t need a computer as it is a standalone device. thedigisync.com if anyone is interested.

I like that Healtech unit though. Wish they had it when I bought the Digi Sync

[Cormanus]

Dave, looks like the only way to attach a picture to a PM is by linking to it.

[Lord Popgun]

Interesting. I worked with a guy who claimed that in his youth he tuned his alfa romeo 33 (4 carburators) with a make-shift rig made of plastic tubes and plastic bottles. Water instead of mercury, of course

Regarding this tool: I don't get it: don't all 4 vaccum tubes go to a single MAP sensor? Won't pressures be equalized no matter what? I think I don't get what's really going on on the TBs and those vacuum tubes.

JT, there would actually be 4 transducers. One for each hose. The pressures would be converted to digital data sent to the attached computer for display. That's a simplified explanation.

[max]

Dubs if you do get a vacuum set of sorts don't forget to check the instrument itself is indicating correctly by connecting all four tubes together with some aquarium 4 way connectors and watch the indication, i have a set and check my gauges from time to time to avoid unnecessary mistakes.