BMW K bikes (Bricks)

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1Back to top Go down    K100 RS 16v on Thu Jul 02, 2015 3:37 pm

marknico

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Hi all need abit of advice, I`ve noticed when I pull away in first from a standstill transmission seems jerky helps if I pick the revs up abit it`s as if I`m pulling away in a to higher gear is this ought to worry about ? Dosen`t slip or miss gears when riding even underload just first from a standstill, any info greatly appreciated cheers

    

2Back to top Go down    Re: K100 RS 16v on Thu Jul 02, 2015 6:47 pm

Tfreeze

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Is this a new behavior for your bike?

I have only put a few hundred kilometers on my K100RS, but it exhibits the same the same tendency to be jerky in first when the temp is cooler. I figured it was an engine fueling issue.

I have been attributing it to a "simple" electronic fuel injection system that doesn't like being cold. My fuel injected Triumph was the same way when cold; a bit jerky/ hard to ride smooth at low throttle openings.

Now you have me wondering if it is not normal.

    

3Back to top Go down    Re: K100 RS 16v on Thu Jul 02, 2015 7:01 pm

marknico

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@Tfreeze wrote:Is this a new behavior for your bike?

I have only put a few hundred kilometers on my K100RS, but it exhibits the same the same tendency to be jerky in first when the temp is cooler. I figured it was an engine fueling issue.

I have been attributing it to a "simple" electronic fuel injection system that doesn't like being cold. My fuel injected Triumph was the same way when cold; a bit jerky/ hard to ride smooth at low throttle openings.

Now you have me wondering if it is not normal.
First K bike I`ve owned and only ridden it for a week so it could well be the norm ? Just from a standstill in first gear seems jerky especially on a incline gets abit better if revs are increased on pull away maybe it`s the way they are doesn't play up through the rest of the gears so I`m hoping it`s nothing to be to concerned about as parts for these bike`s ain`t cheap :0(
Cheers Mark.....

    

4Back to top Go down    Re: K100 RS 16v on Fri Jul 03, 2015 12:07 am

RicK G

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Quite possibly that the Throttle Position Sensor is not adjusted correctly.
If you listen carefully you will hear a faint click as the switch operates just as you open the throttle and the finer you can make that adjustment the better it will be. This only applies to 8 valve engines.
A 16 valve engine will also exibit similar behaviour if the TPS is not adjusted correctly. To adjust them a bit of trial and error is needed, if you slacken of the 2 screws holding the TPS then turn it about 1mm at a time going upward on the outside screw, often 1mm is all that is needed. It is because they are a touch lean just coming off the stop.


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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
    

5Back to top Go down    Re: K100 RS 16v on Fri Jul 03, 2015 5:38 am

marknico

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@RicK G wrote:Quite possibly that the Throttle Position Sensor is not adjusted correctly.
If you listen carefully you will hear a faint click as the switch operates just as you open the throttle and the finer you can make that adjustment the better it will be. This only applies to 8 valve engines.
A 16 valve engine will also exibit similar behaviour if the TPS is not adjusted correctly. To adjust them a bit of trial and error is needed, if you slacken of the 2 screws holding the TPS then turn it about 1mm at a time going upward on the outside screw, often 1mm is all that is needed. It is because they are a touch lean just coming off the stop.

Many thanks for info I ll check the TPS setting......

    

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