Waz wrote:Upside down shock and blue zip ties are an indication of the shody workmanship.

KafeRacer wrote:Does anyone have any rebuild instructions for front forks for a 1990 K100RS or K1.

Inge K. wrote:

KafeRacer wrote:Does anyone have any rebuild instructions for front forks for a 1990 K100RS or K1.

OEM manual for K1/RS16V you find here.

Two Wheels Better wrote:Dave, is that one of those 'new' Progressive-brand adjustable rear shocks? I have only seen a listing of the correct length for the Monolever swingarm and it's obvious you're using Paralever.

Never mind, I've read a previous post.

RicK G wrote:AFAIK you cant fit a O2 sensor to an L-Jetronic. If your engine is 16V then it's a Motronic

RicK G wrote:So in essence all it does is monitor the AFR but doesn't interface with the L-Jetronic?

RicK G wrote:The water temp sensor will make it lean out as it gets hotter.
I do hope you are using the 8V temp sensor.
Graph for the sensor

Kaptain Holister wrote:Great read. Sounds like you've adapted the systems quite well and she's running smooth. Would be good to hear the results from the dyno and what your final FP setting is.
Just some questions, considering you've used a 4V motor.
Why didn't you use a motronic instead of the L-Jet?
What injectors are you using (oem #)?

Very sexy machine all round . Well done.

KafeRacer wrote:Does anyone know how an L-Jetronic system is affected by the water temp sensor?
There are 3 stages the L-Jet goes thru while warming up.
Cold Start Enrichment: Only when the starter button is pressed the ECU increases the injection time considerably after checking the coolant temp. This is to compensate for fuel condensing in the intake chambers and cylinders and not vapourising completely prior to any ignition. If temps are very low ie <0°c, injection times can be doubled by the ECU.
After Start Enrichment: When the starter button is released and the motor is running (>720rpm), The ECU goes into After Start Enrichment mode for around 30 secs. The ecu monitors the coolant temp and increases injection times by 30 to 60%.
Warmup: At this point the ECU monitors air flow and temp and adjusts fuel injection times so as to maintain idle untill the engine reaches operating temperature and the ECU produces a base injection time.

As I have installed a wide-band O2 sensor I can monitor the AFR.  The way it is configured now is as follows:

Bike Idles at 1070 shortly after starting and warm enough to not need choke - AFR hovers at 14.
Bike continues to warm up idle slowly increases to about 1250 after 10 minutes - AFR hovers at 14.
Note:  If I press the start button, it riches the mixture (as notes many places on the forum)  With the starter button pressed the AFR richens to about 12, release button and it goes back to 14.
AFAIK the ECU ignores any further signals from the starter button once the engine is running over 720rpm.

After the bike warms up further there is a distinctive point where idle shoots up from 1250 to 1600, and AFR richens from 14, down to 11.8.  Note: Once this occurs, pressing the starter button no longer richens the AFR. At this point pressing the starter button has no affect on AFR.

I assume this is normal, and just a change in the fuel map after the bikes water temp reaches a certain point.

I am also assuming that if I adjust the AFR to be leaner at operating temp, it will be quite lean before the L-Jet changes to its operating fuel map.  Should I be concerned?  I am assuming not, and that running lean during warm-up will simply result in reaching operating temp faster?
I would guess that your #415 injectors would be producing a reasonably rich mix at 3.5bar so leaning it out would be good but running 'lean' would not be ideal.

I also notice that once the bike is at operating temp the spring tension on the air flow meter has virtually no affect on the AFR at idle. Does the L-jet not look at the air flow meter when the throttle is closed? And simply apply only a fixed amount of fuel?

Just looking for thoughts.

Mossy1200 wrote:Like the air filter.

yours comes out on a sharper angle than mine what is the leg position like?