K11 Owners Group

blue95lt · Posted: Sun May 22, 2011 11:20 pm Post subject: throttle body sync

Ernie N.Hampshre u on? I need to sync. my throttle bodies!pm if u like.did u go thru all the steps indetail again so I can do it .did u follow the chilton manual to the letter?a)timing corect b.)new plugs.C)new plugs?c)valve clearence adjusted and so on?
_________________
1995 k1100lt daily ride(22953)when I got it
1982 cb650sc blue nighthawk (38000)(crashed)
1974 kz400(sold to get nighthawk)

Shoganai · Posted: Tue May 24, 2011 10:09 am Post subject:

I've never done this.

Is it hard to do?
_________________
1993 K1100RS aka The Shop Whore
1994 K1100RS aka Blue Streak

The long road is a rainbow and the pot of gold lies there.
So slip the chain and I'm off again,
You'll find me everywhere. I'm a Rover. - JT

Nana korobi ya oki

merlin geikie · Posted: Tue May 24, 2011 11:26 am Post subject:

Be good to know how to do this.

FD used to say it was the essence of a buzzless K11 Wink

If anyone has the energy please step us through.

I have a manometer but not sure what to do with it Embarassed

all the best

Shoganai · Posted: Tue May 24, 2011 12:08 pm Post subject:

blue95lt · Posted: Tue May 24, 2011 12:58 pm Post subject: bust up

Gwyn you crack me up!! thx for being you!!
keith
_________________
1995 k1100lt daily ride(22953)when I got it
1982 cb650sc blue nighthawk (38000)(crashed)
1974 kz400(sold to get nighthawk)

leecow · Posted: Tue May 24, 2011 1:19 pm Post subject:

Here's the Duck tb sync walkthrough. http://smithduck.home.comcast.net/~smithduck/bmw/tech/tbsynch/tbsynch.htm
_________________
Lee
'93 K1100RS

Number 6 · Posted: Tue May 24, 2011 4:07 pm Post subject:

First, you need a "depressiometer", a way to measure a difference of pressure. You can build one like this one, I made it from aquarium equipment, it works for 2, 3 or 4 cylinders:

But I finally aquired a less bulky one, the twinmax is nice, even though you can only synchronize one cylinder to another at a time, once again with an aquarium "switch", I can easily change of cylinder.

The engine has to be warn, and you need to take out the left fairing, the reference cylinder is number 3 (1 is the front cylinder), the one attached to the throttle cable.

For 1000cc 16v engines, you need to unplug number 1 cylinder and add a "T" attachment between the fuel regulator, for K11 there is no such thing, remove the caps on the other cylinders.

Before you start, check that the twinmax needle is at center at maximum sensitivity.

Now you need to fully screw the 4 air "idle" screws where the pipes are plugged and run the engine between 2500-3000 rpm, either block the throttle or use the ramp idle screw (you need the shut down the engine and set full throttle to access it). Start with cylinder 4 for instance, unscrew the nut and play with the ramp screw until you have the same pressure, then screw tighly the nut back, if it is not, it will not keep synchronized. Check that it keeps synchronized after screwing the nut.

Then switch to cylinder 2 then to 1. If the ventilator runs, let it idle at 1000 rpm or turn down the engine.
Now unscrew the 4 air idle screws 1 turn and a half each, idle the engine (around 950 rpm), synchronize cylinder 4 to 3 using only the 4th cylinder ar idle screw, then cylinder 2, then cylinder 1. If you need to change cylinder 3 air idle screw, you need to resynch the 3 other air idle screws too.
If idle is too high or too low, play with the idle ramp screw, or you can play a little bit with cylinder 3 air idle screw, in all cases you need to resynch the air idle screws.

After that you need to set the TPS, you have the information on lagardier site: http://www.largiader.com/articles/motronic.html, it is very important, if TPS is not set correctly, the bike will run very poorly. It is a good practise to check motronic defaults and reset defaults if any before synch.

With some practise, you can have a right synch in half an hour, but much more the first time, and check after a few day that it stays synchonized (if a nut is not screwed tight enough for instance, it will change).
_________________
I am not a number, I am a free man.

94 K1100LT

Scott_Anderson · Posted: Tue May 24, 2011 10:49 pm Post subject:

It's not a bad idea to check the valve clearances before you warm up the engine.
At least if you know that it hasn't been done recently.
Otherwise you could be chasing your tail.
_________________
Ride safe.

1995 K1100LT 0302044
2017 FLHTK Ultra Limited
Garmin StreetPilot 2820
Garmin Zumo 550
Garmin Zumo XT
"One who does not ask questions is ashamed to learn" Danish proverb
1997 K1100LT 0302488(R.I.P.)
1997 R1100RT ZC62149(sold)

Number 6 · Posted: Wed May 25, 2011 1:19 am Post subject:

I'd say the other way around: when you change valve clearance, resync. Whenever you feel the engine is not perfectly running, resync too.

Some say you should have new plugs before you sync.
_________________
I am not a number, I am a free man.

94 K1100LT

merlin geikie · Posted: Wed May 25, 2011 4:24 am Post subject:

Thanks Number 6,

I have made up a plastic pipe style manometer for my R65LS.

But now I also have a Twinmax.

The K12 motor is very similar indeed to the other K motors including indentical throttle bodies but a plastic fuel rail instead of metal.

I have just checked and adjusted my valves and so I guess a TB sync is a good idea.

Appreciate your input with this procedure and the pics,

thank you... Wink

Scott_Anderson · Posted: Wed May 25, 2011 7:36 am Post subject:

Shoganai · Posted: Wed May 25, 2011 10:23 am Post subject:

Number 6 · Posted: Wed May 25, 2011 10:54 am Post subject:

I personnaly sync more often than check valve clearance.
_________________
I am not a number, I am a free man.

94 K1100LT

blue95lt · Posted: Wed May 25, 2011 1:05 pm Post subject: sync "tool"

I wanted to ask Ernie NH. cause he was telling me about using hot sauce bottles as the container with rubber stoppers in top and sm. tygon tubing
Put a. t. f. fluid in bottles and it seeks its level when the vaccume is same on any two t.bodies.
Any one get Ernie's attention for me?
thx. keith(blue95lt)
_________________
1995 k1100lt daily ride(22953)when I got it
1982 cb650sc blue nighthawk (38000)(crashed)
1974 kz400(sold to get nighthawk)

supercat1 · Posted: Wed May 25, 2011 1:28 pm Post subject:

a little searching goes a long way --

http://k11og.org/forum/viewtopic.php?t=7695&highlight=taco+sauce

scroll down to see ernie's pictures and explanation.
_________________
(formerly) 1993 k1100rs

Shoganai · Posted: Wed May 25, 2011 2:31 pm Post subject:

I like this a lot!

http://store.beemerboneyard.com/carbtune4col.html
_________________
1993 K1100RS aka The Shop Whore
1994 K1100RS aka Blue Streak

The long road is a rainbow and the pot of gold lies there.
So slip the chain and I'm off again,
You'll find me everywhere. I'm a Rover. - JT

Nana korobi ya oki

BMGraeme · Posted: Wed May 25, 2011 6:50 pm Post subject:

Jimmyd · Posted: Wed Jul 20, 2011 5:03 am Post subject: Morgan Carb Tuner

Scott_Anderson · Posted: Wed Jul 20, 2011 7:40 am Post subject:

Yes you are on target.
Except I would turn in the brass screws(very gently so you don't give them a flat spot) then start with them all turned out 1-1/2 turns and adjust accordingly.
If you are not adjusting the butterfly's you can start with any cyl as your base line, just have them all equal and end with idle rpm near 950.

It looks like #6's write up also covered the butterfly sync, that you may not need to do.
_________________
Ride safe.

1995 K1100LT 0302044
2017 FLHTK Ultra Limited
Garmin StreetPilot 2820
Garmin Zumo 550
Garmin Zumo XT
"One who does not ask questions is ashamed to learn" Danish proverb
1997 K1100LT 0302488(R.I.P.)
1997 R1100RT ZC62149(sold)

Jimmyd · Posted: Wed Jul 20, 2011 9:27 am Post subject: TB Sync