BMW K bikes (Bricks)

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1Back to top Go down    K100 RS 16v on Fri Jul 03, 2015 12:07 am

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 Fri Jul 03, 2015 3:17 am

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 Fri Jul 03, 2015 3:31 am

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 8:37 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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If everything seems under control then you aint goin fast enough:- Mario Andretti
Bikes 1986 K100RT, 1993 K1100 LT, 1994 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 2:08 pm

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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