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stagewex
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So is this the tool that most folks like and use for their Bing carbs. This would be for a 1969 r60/2. Expensive little buggers since it looks like the price is for one but you need two of them.

Looks like I can't use my TwinMax or even my Harmonizer on these types of carbs. Too bad.

http://www.amazon.com/Empi-Universal-Carburetor-Synchronizer/dp/B0075AW6CI

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mike wex/stagewex
1969 BMW r60/2, US Model, 1995 BMW K75, 2006 Yamaha TW200, 2007 Ural Patrol

schrader7032
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That's them. They were

That's them. They were cheaper 3-4 years ago...I think I got my set for around $80. There is a mod that can be made to the carb that would allow you to use a TwinMax. I believe Bing even sells a kit for it.

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Kurt in S.A.
'78 R100/7 '69 R69S '52 R25/2

capebretonmarkbmw
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Yes you can use

Yes you can use your Twinmax testers by installing a tube in both carb bodys. http://www.barringtonmotorworks.com/gallery.php?sid=2&gid=26 Barrington sells them. I like this set up because you don't have to hold the testers with your hands and
you will get a trusted seal. Mark

schrader7032
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VBMWMO #7032
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I don't have to hold my EMPI

I don't have to hold my EMPI testers with my hands. The rubber seal around the connector fits well on my R69S carbs. While the conversion to use a TwinMax would be the best, it clearly is a critical modification as it makes a permanent change to the carb...and for me, an excellent opportunity to screw it up and trash a carb. The EMPI leaves no marks.

If one was starting with no TwinMax or no EMPI, the cost is generally going to be a push...you just have to take the extra step of modifying the carbs. I used my EMPI gages to help someone on his R51/3, so it was useful in that sense.

Personal choice...I just wasn't comfortable making the permanent change to the carb.

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Kurt in S.A.
'78 R100/7 '69 R69S '52 R25/2

capebretonmarkbmw
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Question ?

I did not know that they fit firmly on the carb snugly! Can you position the gauges so you can read them while revving the engine?
The installation of the tube on the carb's requires a bit of skill and the correct tap. The pewter can take the drilling but you do have to remove the bur and fillings. I have done this and they have not given me any problems to date. mark

schrader7032
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Yes, the gage part can easily

Yes, the gage part can easily be turned but in its normal position, it's easily viewable from looking straight down on them. The cone shaped part in the first post link is what secures the setup to the carb inlet. If the carb inlet is too small, then it won't fit well.

Jeff Dean posted a picture of the gages installed:

http://vintagebmw.org/v7/node/9361#comment-20343

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Kurt in S.A.
'78 R100/7 '69 R69S '52 R25/2

stagewex
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I ended up ordering the EMPI

I ended up ordering the EMPI (2 of them of course). For the same reasons stated I really didn't want to modify anything to use the TwinMax.

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mike wex/stagewex
1969 BMW r60/2, US Model, 1995 BMW K75, 2006 Yamaha TW200, 2007 Ural Patrol

rimcanyon
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What is the advantage of the

What is the advantage of the EMPI gauge over the Uni-Syn? For some reason Uni-Syns are cheap on Ebay compared to EMPI. I've used Uni-Syns for years, never tried an EMPI.

-Dave

stagewex
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EMPI: Getting ready to use the first time

Funny I didn't see any youtube or other video specific to a BMW /2. But there are enough based on VW bugs.
If anyone wants to add anything that might be helpful it would sure be appreciated. Like a step-by-step on a /2.

I'm going to use this weekend using the old "shorting out one side at a time" & "ear" method (with someone more experienced). Then use these EMPI's to see how close I got.

  • img_0508.jpg
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mike wex/stagewex
1969 BMW r60/2, US Model, 1995 BMW K75, 2006 Yamaha TW200, 2007 Ural Patrol

808Airhead
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Loosen the throttle cable

Loosen the throttle cable adjusters when synching the idle,adjust the engine when warm. You have a small window to adjust before the engine can overheat at idle so work quickly. After the idle synch is done,leave approx. 1mm of freeplay at the cable adjusters and synch the throttle cables,just as you crack the throttle watch the synch tools so you can synch the initial cable adjustment as the carbs just crack open. DO NOT BLIP the throttle with these attached it will BREAK the synch tool! Ask me how I know! Only open the throttle gradually. After the cable synch at
off idle" open the throttle a little more and watch the synch,this will be the "cruise" adjustment,this is more critical to be in synch than the "just off idle",you want the vacuum readings to be similar with the throttle open around 1/5- 1/4 throttle (abuot 9-10 on the synch meters).

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Thomas M.
R69s - R60/2 - R67/2 - R51/3

martyn74
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I saw a video on U tube a guy

I saw a video on U tube a guy switching this gauge from one carb to the next with the bike ticking over so I bought one, postage is almost $50 so if you think there expensive in the US you have it good. Do I need to buy another?

808Airhead
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Better to have 2. You can

Better to have 2. You can watch the slides open simultaneously,as well as the carb synch with light throttle.

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Thomas M.
R69s - R60/2 - R67/2 - R51/3

stagewex
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I saw that too

martyn74 wrote:

I saw a video on U tube a guy switching this gauge from one carb to the next with the bike ticking over so I bought one, postage is almost $50 so if you think there expensive in the US you have it good. Do I need to buy another?

I saw similar, on a VW bug and another on a Porsche. Y'ad think working on a Porsche the mechanic would at least have two (2) of them instead of going back-and-forth.

As mentioned I'm doing a tech session with a friend on Sunday. He likes to do the short-one-side/ear method. If I can get him to use the EMPI's I'll do a youtube video for a /2.
Really surprised there isn't one posted already since there are so many of these bikes still on the road and this tool seems to be one of the more popular ones.

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mike wex/stagewex
1969 BMW r60/2, US Model, 1995 BMW K75, 2006 Yamaha TW200, 2007 Ural Patrol

stagewex
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Air Flow Idle setting on the meter

808Airhead wrote:

Loosen the throttle cable adjusters when synching the idle,adjust the engine when warm. You have a small window to adjust before the engine can overheat at idle so work quickly. After the idle synch is done,leave approx. 1mm of freeplay at the cable adjusters and synch the throttle cables,just as you crack the throttle watch the synch tools so you can synch the initial cable adjustment as the carbs just crack open. DO NOT BLIP the throttle with these attached it will BREAK the synch tool! Ask me how I know! Only open the throttle gradually. After the cable synch at
off idle" open the throttle a little more and watch the synch,this will be the "cruise" adjustment,this is more critical to be in synch than the "just off idle",you want the vacuum readings to be similar with the throttle open around 1/5- 1/4 throttle (abuot 9-10 on the synch meters).

For the initial sync what do you use as your best setting for idle air flow using the idle adjustment screw? Just looking for a baseline.
I'm guessing that upon being mildly warmed up it is a low as you can go without stalling?

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mike wex/stagewex
1969 BMW r60/2, US Model, 1995 BMW K75, 2006 Yamaha TW200, 2007 Ural Patrol

schrader7032
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I've posted this

I've posted this before...comes from the Bing manual which is worth having. Initial settings are listed:

https://www.flickr.com/photos/roundel/66174400/in/dateposted/

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Kurt in S.A.
'78 R100/7 '69 R69S '52 R25/2

VintageSalesand...
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Carb Sync

Hi,

The bike should be at operating temp before you try to do this. I will either go for a short ride, or let it idle for a while with a big box fan blowing from the front of the bike.

I'm also not a fan of setting the idle super low.

I make initial idle mixture settings, then sync idle air flow using the meters by adjusting the idle stop screws. Then the off idle settings via the cable adjusters - using the meters again, then half throttle settings. Then lock the jam nuts on the cables down. I feel that the rubber cable adjuster covers can hang up the cables so I don't always use them.

Then I'll go back and fine tune the idle mixture using a shorting rod to shut off one side at a time.

Jeff

BMWR50_Spain
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Murcia, Spain
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EMPI Carb synch

Is there any value of the readings we must obtain in the EMPI for different regimes (for example, at idle for a BMW-R50)?
I know it is about balancing both cylinders, but I understand it can help to confirm that the value of volumen of air is correct.
Perhaps it has already been answered. If so, sorry and thanks for your patience.

schrader7032
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VBMWMO #7032
San Antonio, TX
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I've never paid attention to

I've never paid attention to the actual numbers...just that they were balanced.

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Kurt in S.A.
'78 R100/7 '69 R69S '52 R25/2

ReDevil.1967_R50_2
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EMPI Carb sync

Hey Gentlemen, thank you for all the sound advice concerning the uses of the EMPI. I have never attempted syncing a carb but this will really help. I do have one question, is it really nessesary to have two EMPI units. Most of the youtube videos the techs have only one.

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Ike in New London, CT
'67 R50/2

schrader7032
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It's something of a hassle to

It's something of a hassle to move the gauge from side to side, plus as you move it, you're making a change that might not reflect the actual readings. That said, using two gauges assumes that each gauge reacts EXACTLY as the other, which might be a bit of a stretch.

No harm in trying just one and seeing how it goes. If you think it could be better, buy a second one later on.

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Kurt in S.A.
'78 R100/7 '69 R69S '52 R25/2

mcsherry1328
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Madison, WI
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Empi carb sync

I bought one only and it was simple to switch from side to side with bike idling. I see no need to buy two.
The reference numbers are just a relative guide.
This is an easy tool to use and I would recommend it. Michael

808Airhead
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Having 2 is better since you

Having 2 is better since you can perfectly synch the off-idle throttle opening,that is key for low rpm/smooth take off.

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Thomas M.
R69s - R60/2 - R67/2 - R51/3

Littlemicrocars
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Italian carb syncro tool

I was in Italy at the Imola race track where there was a scambio going on. There was some very expensive multi cylinder bike being started up. there was an old timer helping with some issues tring to sync the carbs on a BENELLI He installed 4 round popcycle sticks in each carb with the engine turned off... slowly rotated the throttle to see the movement of the sticks and adjusted them so they all moved down a the same time evenly...Lots of people looking on.. OLd school tuning . quick ..down and dirty and very effective.

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