Author Topic: K1 K100 4V FUEL SUPPLY & ADJUSTMENTS SB 13 023 91 2475 Sept 1991  (Read 953 times)

Offline volador

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K1 K100 4V FUEL SUPPLY & ADJUSTMENTS SB 13 023 91 2475 Sept 1991
« on: December 19, 2019, 04:44:44 PM »

* 2475.pdf (519.84 kB - downloaded 251 times)
  • NYC NY
  • 1991 K100RS 1993 K75S ABS
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Offline The Mighty Gryphon

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Re: K1/K1004V Fuel Supply & Adjustments —SB 13 023 91 2475 September 1991
« Reply #1 on: December 19, 2019, 08:31:41 PM »
There's no need for a KTE201 to set the TPS.

1. With the ignition OFF, connect pin #3 of the diagnostic plug to ground. 

2. Turn on the ignition.

3. If it isn't lit, loosen the mounting screws and adjust the TPS so the temperature warning lamp on the instrument  cluster lights up. 

4. Tighten the TPS mounting screws and rotate the throttle.  The temperature light should go out as soon as the throttle is moved off the idle position.

  • In my garage in Marilla, NY
  • '94 K75RT Mystic Red, '91K100RS White/Blue, '89 K100RS Special edition White/Blue
Current:
'94 K75RT "Ilsa, She Wolf of the SS"
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'89 K100RS SE

Offline volador

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Re: K1/K1004V Fuel Supply & Adjustments —SB 13 023 91 2475 September 1991
« Reply #2 on: December 20, 2019, 11:06:31 AM »
Throttle Position Sensor (TPS) Test:
To test the TPS
Ignition OFF, Ground Pin #3 and monitor Pin #1 with a 12V LED (+lead to Battery + and -lead to Pin#1).
Ignition ON, Engine OFF (Pin #3 should remain grounded during this test)

The Test LED will be ON at idle (closed throttle) and OFF just above idle. You should also be able to watch the temperature warning lamp on the tachometer blink ON at idle and OFF just above idle.
Pin #1 should be Low at idle and High just above idle. In other words, if you are measuring from ground to Pin #1 with a voltmeter, Idle should be close to 0 Volts and just above Idle should be close to 12 Volts. (This test also works for Oilheads (1994-2001) with Motronic 2.2 Engine control Units but since there is no temperature warning lamp, you must use either a voltmeter or a Test LED as described above).

NOTE: Measuring the voltage between pins 1 and 4 at the TPS connector should indicate
0.375 Volts at the idle setting (closed throttle) with ignition ON engine OFF.
Snap the throttle open/closed a few times to ensure a consistent reading. To adjust the TPS, loosen the two screws slightly and rotate the TPS until the temperature warning lamp (or the Test LED) 'just' comes ON at idle and goes OFF just above idle. If you are using a voltmeter, adjust the voltage to 0.375 at idle (closed throttle). This voltage MUST remain below 0.400 Volts at idle.

http://www.k11og.org/forum/viewtopic.php?t=2110&start=0&postdays=0&postorder=asc&highlight=

http://www.largiader.com/articles/motronic.html
  • NYC NY
  • 1991 K100RS 1993 K75S ABS
5 BOROUGHS SISYPHEAN SOCIETY  MAINTAINING THE OBSESSION
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Offline The Mighty Gryphon

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Re: K1/K1004V Fuel Supply & Adjustments —SB 13 023 91 2475 September 1991
« Reply #3 on: December 20, 2019, 12:45:13 PM »
You don't need the LED to set the TPS.
  • In my garage in Marilla, NY
  • '94 K75RT Mystic Red, '91K100RS White/Blue, '89 K100RS Special edition White/Blue
Current:
'94 K75RT "Ilsa, She Wolf of the SS"
'91 K100RS "Moby Brick Too
'89 K100RS SE

Offline Filmcamera

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Re: K1/K1004V Fuel Supply & Adjustments —SB 13 023 91 2475 September 1991
« Reply #4 on: December 20, 2019, 06:05:24 PM »
Very useful test procedure, thanks.


I did it today and my TPS was slightly off so I adjusted it. It is  a piece of cake to do.


I have not had a chance to go for a test ride yet but will report back when I do. 


Thanks again.
  • San Jose, Costa Rica
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Offline TommyT

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Re: K1/K1004V Fuel Supply & Adjustments —SB 13 023 91 2475 September 1991
« Reply #5 on: December 20, 2019, 07:59:50 PM »
I also tried this on my 1991 K100RS 16V, the light when off as soon as I slightly turned the throttle.   
  • Olive NY
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Offline The Mighty Gryphon

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Re: K1/K1004V Fuel Supply & Adjustments —SB 13 023 91 2475 September 1991
« Reply #6 on: December 20, 2019, 11:37:56 PM »
I also tried this on my 1991 K100RS 16V, the light when off as soon as I slightly turned the throttle.

That's what it's supposed to do.  Sounds like you got it right.
  • In my garage in Marilla, NY
  • '94 K75RT Mystic Red, '91K100RS White/Blue, '89 K100RS Special edition White/Blue
Current:
'94 K75RT "Ilsa, She Wolf of the SS"
'91 K100RS "Moby Brick Too
'89 K100RS SE
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Offline TommyT

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I also tried this on my 1991 K100RS 16V, the light when off as soon as I slightly turned the throttle.
Well I tried this on my other 1991 K100RS I have. It a bike I picked up that had sat for many years. I got it running and I have put about 200 miles on it. Starts well but I noticed some surging at 3000 to 4000 at light to part throttle. Full throttle feels great. I just tried the TPS test and I get no light on the temp warning light. I twist the throttle and nothing. I pull the ground wire and the light comes on. I tied cleaning the TPS connector and do the test again but no light. I loosen the screws and turn the TPS but still no light. If I do ot while the bike is running it does change the idle.

Do I have bad TPS?
  • Olive NY
  • Running: 1990 K75s, 1990 K75RT Projects: 1991 K100 16V(2), 1986 K75 "T"

Offline Laitch

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Re: K1 K100 4V FUEL SUPPLY & ADJUSTMENTS SB 13 023 91 2475 Sept 1991
« Reply #8 on: July 06, 2020, 10:37:51 AM »
Do I have bad TPS?
One way to find out for yourself is to remove the switch from the other moto and substitute it for the suspected problem child.
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