BMW K bikes (Bricks)


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1Back to top Go down   Balance throttle bodies Empty Balance throttle bodies Tue Sep 05, 2023 8:27 pm

lucki

lucki
Silver member
Silver member
Shown is the two pop bottles that I had great luck balancing the carbs(cylinders) on my yamahas, one a xs two cylinder and a xj a four cylinder. Now that I have come over to the dark side could I use this set up to  balance my 3 cylinder k75?  Or do I have to spring for another pop bottle?
For the xj I would do 1 and2 then 3and 4 then 2 and3 worked super.
I was thinking for the k75 it might go, 1 and 2 then 2and 3?
Thoughts.Balance throttle bodies Img_2054

    

2Back to top Go down   Balance throttle bodies Empty Re: Balance throttle bodies Wed Sep 06, 2023 2:30 am

Point-Seven-five

Point-Seven-five
Life time member
Life time member
That rig will work great.  Set the idle bypass screw on the #3 cylinder to 1 1/2 turns from lightly bottomed.  Connect the rig to cylinder #3 and cylinder #2.  Cylinder #3 is going to be your reference for the other two cyliders.

Then adjust the #2 cylinder to #3.  When that is done use the rig to adjust #1 to #3.


__________________________________________________
Present: 1991 K100RS "Moby Brick Too"
 
Past:
1994 K75RT "Ilsa, She Wolf of the SS"
1988 K100RS SE "Special Ed"
1994 K75S "Cheetos"
1992 K100RS "Moby Brick" R.I.P.
1982 Honda FT500
1979 Honda XR185
1977 Honda XL125
1974 Honda XL125
1972 OSSA Pioneer 250
1968 Kawasaki 175
    

3Back to top Go down   Balance throttle bodies Empty Re: Balance throttle bodies Wed Sep 06, 2023 6:48 am

lucki

lucki
Silver member
Silver member
Many thanks! Getting my to do list in order for the end of season. Up to 1900km since I got the bike out of moth balls in may. Running fine and does not use oil. On to do list are: steering head bearings new hoses in tank, pull tranny and lube spline, replace brushes in starter , flush shocks, balance front wheel and new bearings. Any suggestions?
Life is easy with hydraulic lift table to work on bike, my best buy!

    

4Back to top Go down   Balance throttle bodies Empty Re: Balance throttle bodies Mon Sep 11, 2023 5:04 pm

lucki

lucki
Silver member
Silver member
When balancing throttle bodies . What do you do with the vacuum line that goes to number three? Plug ,tee, leave open?

    

5Back to top Go down   Balance throttle bodies Empty Re: Balance throttle bodies Mon Sep 11, 2023 5:20 pm

Point-Seven-five

Point-Seven-five
Life time member
Life time member
I originally teed it to the vacuum line on the last cylinder where it came from.  #3 on K75 and #4 on a K100.

However, lately I have been leaving it open to avoid the vacuum pulses from possibly causing the fuel pressure to bounce around.  I'm not sure it really makes a difference, but it makes me feel better.


__________________________________________________
Present: 1991 K100RS "Moby Brick Too"
 
Past:
1994 K75RT "Ilsa, She Wolf of the SS"
1988 K100RS SE "Special Ed"
1994 K75S "Cheetos"
1992 K100RS "Moby Brick" R.I.P.
1982 Honda FT500
1979 Honda XR185
1977 Honda XL125
1974 Honda XL125
1972 OSSA Pioneer 250
1968 Kawasaki 175
    

6Back to top Go down   Balance throttle bodies Empty Re: Balance throttle bodies Mon Sep 11, 2023 7:25 pm

lucki

lucki
Silver member
Silver member
Open it is. Chris Harris has a video and the tube but looks.like it is ignored too.

    

7Back to top Go down   Balance throttle bodies Empty Re: Balance throttle bodies Tue Sep 12, 2023 7:58 am

Dai

Dai
Life time member
Life time member
Yes. I have seen that one and noted that point too.


__________________________________________________
1983 K100 naked upgraded to K100LT spec after spending time as an RS and an RT
1987 K100RT
Others...
1978 Moto Guzzi 850-T3, 1979 Moto Guzzi 850-T3 California,1993 Moto Guzzi 1100ie California
2020 Royal Enfield Bullet 500
    

8Back to top Go down   Balance throttle bodies Empty Re: Balance throttle bodies Tue Sep 12, 2023 1:57 pm

Laitch

Laitch
Life time member
Life time member
If you make that rig with half-pint vodka bottles, you're less likely to be uptight about the outcome, at least the first time.

    

9Back to top Go down   Balance throttle bodies Empty Re: Balance throttle bodies Tue Sep 12, 2023 3:30 pm

lucki

lucki
Silver member
Silver member
I might go to three bottles. I like The vodka bottle solution. Question: how do I get rid of The vodka?

    

10Back to top Go down   Balance throttle bodies Empty Re: Balance throttle bodies Tue Sep 12, 2023 6:02 pm

Laitch

Laitch
Life time member
Life time member
lucki wrote:Question: how do I get rid of The vodka?
You metabolize it.

    

11Back to top Go down   Balance throttle bodies Empty Re: Balance throttle bodies Tue Sep 12, 2023 8:15 pm

Dai

Dai
Life time member
Life time member
Can't spell. He's already been on the bottle.


__________________________________________________
1983 K100 naked upgraded to K100LT spec after spending time as an RS and an RT
1987 K100RT
Others...
1978 Moto Guzzi 850-T3, 1979 Moto Guzzi 850-T3 California,1993 Moto Guzzi 1100ie California
2020 Royal Enfield Bullet 500
    

12Back to top Go down   Balance throttle bodies Empty Re: Balance throttle bodies Tue Sep 12, 2023 8:55 pm

Point-Seven-five

Point-Seven-five
Life time member
Life time member
lucki wrote:I might go to three bottles. I like The vodka bottle solution. Question: how do I get rid of The vodka?
Three bottles won't work.  This balancer works by allowing you to see the vacuum difference between two cylinders.  It can't show the difference between three or more.  The beauty of the two bottle balancer is the absolute accuracy it gives in making the vacuum exactly the same in two cylinders without having to worry about things like gauge accuracy/calibration. 

I like the idea of three(or more) vodka bottles.  Two for the rig, and as many spares as you can get your hands on.


__________________________________________________
Present: 1991 K100RS "Moby Brick Too"
 
Past:
1994 K75RT "Ilsa, She Wolf of the SS"
1988 K100RS SE "Special Ed"
1994 K75S "Cheetos"
1992 K100RS "Moby Brick" R.I.P.
1982 Honda FT500
1979 Honda XR185
1977 Honda XL125
1974 Honda XL125
1972 OSSA Pioneer 250
1968 Kawasaki 175
    

13Back to top Go down   Balance throttle bodies Empty Re: Balance throttle bodies Wed Sep 13, 2023 9:10 am

lucki

lucki
Silver member
Silver member
I have been on other forums that I got valuable information from but no humour. I get both here!
Cheers

    

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