BMW K bikes (Bricks)

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1Back to top Go down    Ignition Advance on Fri Jun 12, 2015 2:58 pm

bettyswolloks

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Hey all, I've just given a Mates bike a full summer service, which included a 4 degree ignition advancer. I've fitted these little things to quite a few bikes over the years and they do make a proper nice difference, cant say if its a bhp increase but defiantly a difference, crisps up the throttle response reet nice Very Happy

  I read somewhere online that this can be done a K bike, only I cant find the article again. The K is going in the garage tomorrow to fettle up a few things and was going to have a play with the timing.

Does anyone have a link to or experience/advice on doing this?







(P.S. I know it has its dangers so none of the don't do it you fool reply's please folks Laughing)

http://ranfog.co.uk
    

2Back to top Go down    Re: Ignition Advance on Fri Jun 12, 2015 3:23 pm

Inge K.

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Inge K.
K100RS -86. (first owner), K1100LTSE -94.
    

3Back to top Go down    Re: Ignition Advance on Fri Jun 12, 2015 4:07 pm

bettyswolloks

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That's the fella, god knows why I couldn't find it Rolling Eyes

Cheers  Pal

http://ranfog.co.uk
    

4Back to top Go down    Re: Ignition Advance on Sat Jun 13, 2015 4:04 am

Motorbike Mike

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Hi,
Could you let me know how you get on please?
I'd like to do the same to mine.

Mike.

    

5Back to top Go down    Re: Ignition Advance on Sat Jun 13, 2015 5:01 am

RicK G

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You can quite safely give them 4° more advance, it makes an enormous difference. Factory only set them at 6° to make them meet the smog laws.


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"Every normal man must be tempted, at times, to spit upon his hands, hoist the black flag, and begin slitting throats."  from Mencken's 1919 Prejudices

Bikes 1993 K1100 LT, 1998 K1100 LT, 1993 K75 RT, 1996 K75RT, 1986 K75 GS, 1979 Z1300 Kawasaki X 2 & 1976 SR 500 Yamaha for now
    

6Back to top Go down    Re: Ignition Advance on Sat Jun 13, 2015 5:21 am

bettyswolloks

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Will do Mike.
Rick, which way did you turn it? Looking at it head on. clockwise or anti-clockwise?

http://ranfog.co.uk
    

7Back to top Go down    Re: Ignition Advance on Sat Jun 13, 2015 6:51 am

RicK G

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Turn the plate clockwise to advance. Turn the plate 2.5mm to get 4°.


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"Every normal man must be tempted, at times, to spit upon his hands, hoist the black flag, and begin slitting throats."  from Mencken's 1919 Prejudices

Bikes 1993 K1100 LT, 1998 K1100 LT, 1993 K75 RT, 1996 K75RT, 1986 K75 GS, 1979 Z1300 Kawasaki X 2 & 1976 SR 500 Yamaha for now
    

8Back to top Go down    Re: Ignition Advance on Sat Jun 13, 2015 10:21 am

bettyswolloks

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@RicK G wrote:Turn the plate clockwise to advance. Turn the plate 2.5mm to get 4°.

Cheers Pal.

I'll report back after I've given it a little tickle

http://ranfog.co.uk
    

9Back to top Go down    Re: Ignition Advance on Sat Jun 13, 2015 1:47 pm

bettyswolloks

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Done did, pictures to follow.
It makes a positive difference, the throttle is nice and crisp. I did the 2.5mm Rick recommended and yeah its worth the little effort it took to do. Then out of curiosity I went a little further just to see. It made the bottom of the rev range, 2000rpm, straight from the get go, very boggy, but get past that and its better, keener to rev higher if you see what I mean. So I tapped it back a little until I was happy with it. Gunna take it for a good run out tomorrow then check the plugs to see how its running.


Worth the effort. Gunna take the allen keys out with Me tomorrow to tweak it. The pictures are on my phone and its taking some time to download to the PC.

Hope this helps folks...

http://ranfog.co.uk
    

10Back to top Go down    Ignition advance on Tue Apr 25, 2017 5:14 am

audibob

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I know this is an old thread, but yesterday I advanced my timing plate 2.5mm clockwise as suggested by Rick G  

Throttle response at the lower end of the rev range is much crisper and seems to rev quicker than before as reported by bettyswollocks.

My bike was smooth at the normal buzz range of between 3800 and 4200 revs before the timing change, and still is smooth so no change there. 

Top end smoothness has not changed either.

Fuel consumption was always good before , but will see if it changes on  a longer trip.

Idle revs have increased by 100 rpm, she now sits at 1k which I prefer.

The motor seems to start a little quicker and the engine noise has reduced slightly, or perhaps its just my perception.

Thanks to Rick G for the info

Bob


__________________________________________________
Yamaha 90
Honda CD 175
Honda CB 360 
Triumph T 140V Bonneville
Triumph T150 Trident
Honda CB750 F1
Cz 175
Yamaha XS 750
R 100/7
R 80
K100 LT
K100 LT current bike
    

11Back to top Go down    Re: Ignition Advance on Tue Apr 25, 2017 7:44 pm

Dai

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Now stick a set of K1100 throttlebodies on and get a couple more BHP... and a bit more torque.


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'83 K100 upgraded to K100RS spec
Others...
'78 Moto Guzzi 850-T3, '79 Moto Guzzi 850-T3 California,'93 Moto Guzzi 1100ie California,
'03 Suzuki Blandit GSF600SK3 (NFS any more because wifey has claimed it)
    

12Back to top Go down    Re: Ignition Advance on Wed Apr 26, 2017 3:57 am

Motorbike Mike

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...or TB's from a 1200?

    

13Back to top Go down    Re: Ignition Advance on Wed Apr 26, 2017 7:15 am

Dai

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Have you tried that one?


__________________________________________________
'83 K100 upgraded to K100RS spec
Others...
'78 Moto Guzzi 850-T3, '79 Moto Guzzi 850-T3 California,'93 Moto Guzzi 1100ie California,
'03 Suzuki Blandit GSF600SK3 (NFS any more because wifey has claimed it)
    

14Back to top Go down    Re: Ignition Advance on Wed Apr 26, 2017 8:24 am

Motorbike Mike

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Yes, I have a set of them on my Flying Brick. They don't have air bleed screws on them or a fast idle cable because the 12 has servo controlled tickover. I adjusted them with the throttle stop screw and with the engine at running temperature so all's well. I do have to open the throttle slightly to start it and warm it up with gentle blipping of the throttle. It would be possible to fit a fast idle cam and cable but I don't need it on the track bike.

    

15Back to top Go down    Ignition advance on Wed Apr 26, 2017 12:29 pm

audibob

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Funny you should mention 1100 throttle bodies, Dai,

 I have a nice set with undisturbed blue paint marks to boot.

Got them from a chap on e bay in Denmark, not too expensive either.

Has everyone who has done this conversion had to adjust the mixture and the response form the air flow meter.

I do not have access to a co meter 

I need to find your thread input Dai, where you swapped the mounting plates over to continue using the k100 throttle cable mounting. 

I have managed to shift two stone in weight, that must be worth a couple of bhp..... 

Bob


__________________________________________________
Yamaha 90
Honda CD 175
Honda CB 360 
Triumph T 140V Bonneville
Triumph T150 Trident
Honda CB750 F1
Cz 175
Yamaha XS 750
R 100/7
R 80
K100 LT
K100 LT current bike
    

16Back to top Go down    Re: Ignition Advance on Wed Apr 26, 2017 2:20 pm

Dai

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This topic:

http://www.k100-forum.com/t1944p50-k1100-throttle-bodies-on-a-k100

My input (such as it was) was from post 95 onwards.


__________________________________________________
'83 K100 upgraded to K100RS spec
Others...
'78 Moto Guzzi 850-T3, '79 Moto Guzzi 850-T3 California,'93 Moto Guzzi 1100ie California,
'03 Suzuki Blandit GSF600SK3 (NFS any more because wifey has claimed it)
    

17Back to top Go down    ignition advance on Thu Apr 27, 2017 3:50 am

audibob

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Thanks for the link Dai,

it was your method I was interested in, ie , swapping the throttle body mounting plates so the original accelerator cable arm can be used.

I will probably do it later in the year when I can get access to a co meter for the mixture

Thanks again

Bob


__________________________________________________
Yamaha 90
Honda CD 175
Honda CB 360 
Triumph T 140V Bonneville
Triumph T150 Trident
Honda CB750 F1
Cz 175
Yamaha XS 750
R 100/7
R 80
K100 LT
K100 LT current bike
    

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