MOTOBRICK.COM
TECHNICAL MOTOBRICK WRENCHING In Remembrance of Inge K. => The Motobrick Workshop => Topic started by: JERRY on January 25, 2013, 12:19:27 PM
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I picked up a K 100 Rs that had been sitting for a couple of years. The gas tank internals had turned to snot as ethanol has been known to do. I replaced the internal fuel lines, fuel pump,filter and had the injecters reconditioned. I checked the air filter and air box for signs of mice and found none. New plugs, oil and filter and coolant change. Brake fluid change front and rear. Trans and rear end fluid looked and smelled good. It is showing 25K. I started it up (after a lot of cranking) and it ran and idled surprisingly well. I shut it off, got it off the lift table and started it up again. I ran it in the garage for 15 minutes so it was warm. I aired up the tires, put on my jacket to ride and when I put it in gear it quit and has not run since. My question?? Did I put too much air in the tires? Clutch in or out:no start. Fat blue spark, fuel pump running, fuel at the fuel rail: No start.HELP
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fouled plugs?
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New fuel filter, again, probably plugged with the great gas we now have.
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I installed new plugs in the initial going over. Still get fat blue spark from both coils. I cleaned the inside of the fuel tank and it looked great. When it quit, it didn`t sputter like a fuel issue. It was more like turning off a switch. I`m stumped!
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K bikes do not like to be idled for extended periods. My first guess would be fouled plugs and a flooded bike.
Start it and ride it.
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Mr. Duck I just tried to start it for the first time today. No throttle, no choke (what is a choke for on fuel injection any way?) just push the button. It turns over fine but no start. I checked the plugs, no foul. A little moist but not wet. What I have NOT done to it is replace the fuel line from the bottom of the fuel rail that runs behind the throttle bodies (pressure regulator?) or the line from in there to the tank. I put a listener on the fuel injectors and they click while it cranks. I also cleaned the connector to the thing under the seat with contact cleaner. The fuel I put in was fresh gas with Lucas fuel treatment in it.I run that stuff in everything that uses gas. What do I do next?.
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The choke just open the throttles a tiny bit.
Does the fuel pump run for a couple of seconds when you push the starter button?
If so, is it a good flow of fuel returning to the tank?
Inge K.
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Yes, that is the fuel pressure regulator hiding in there behind the TBs.
It's not really a choke, it's a slight throttle advance. (I wonder what it reads on a German bike. :dunno2:)
If the plugs are damp then it may be flooded. Pull the plugs and let the cylinders dry out or hit them with a heat gun to evaporate any leftover gas.
Try spraying some starter fluid on the air filter. See if that helps.
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(I wonder what it reads on a German bike. :dunno2:)
Choke.
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Remember. Its either electrics or fuel. Sudden demise tells me its an electrical hassle. Good luck
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If you're getting feul and spark, then the next issue would be timing.
A bike that sat for too long might have a timing issue in the sensor or possibly the chain itself. I would hope, for your sake, that it is the former rather than the latter.
Other possible culprits would be the jet-tronic, amplifier and the often over looked kill switch.
Possible remedies,
1)Check the kill switch
2)Shoot some starter fluid into intake. If it kicks any then its a fuel prob. No kick and its electric.
3)Check for spark at the plug, not the coils
If none of these lead to an answer, then
4)Test your ignition module
5)Check the timing
6)Check the amplifier
Later,
Freelancer
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IT RUNS!!!! Taking the advice from this board, I found my problem. Thanks to all that chimed in. Come to find out the dummy that thinks he is handy with tools (me) didn`t push the new fuel line from the fuel filter in the tank past the swell in the steel fuel before he tightened up the clamp and it blew off. I thought that was the fuel return line. When I checked to see how muck return I had, I spotted the dangling end from the filter spraying. Bingo! I hooked it up, hit the key and it fired right up. It is hard for me to admit that I`m a screw-up so don`t be to harsh with me. Thanks again for the help and I`m sure that I will be able to gleen much more usefull info from this site. Jerry (dumb as a bag of rocks) in KY
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:clap:
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Jerry, if the truth were told, I'm sure we all have made dumb mistakes. Look at it this way, if you hadn't have made that screw-up, you'd have deprived yourself of the elation you felt when you discovered what was wrong! :laugh
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Jerry, if the truth were told, I'm sure we all have made dumb mistakes. Look at it this way, if you hadn't have made that screw-up, you'd have deprived yourself of the elation you felt when you discovered what was wrong! :laugh
Yeah, we all have, it's just fun to hear when someone admits it. Sometimes our gear just gets the best(or worst) of us. I remember a time that I moved a huge rack of audio gear across the room and reassembled it. Then I ran the speaker wires and was ready for some music. I placed a disc into the CD player and hit play. NUTHIN! WTF? I cranked the volume knob. Still nothing! I started checking power cables and wires.
My wife ask me, "Did you plug in the amp?"
"Yes, Dear, the amp is plugged in."
"Did you turn the amp on?", she ask as I am still checking stuff out.
"YES, I turned the amp on."
"Did you put a disc in the CD player?", she questions.
"YES, I put a #@$#* disc in the CD Player."
"Did you push the play button?"
"YES, I #^*#@ pushed the #^*#@ play button.", I snap back. I push it again just to be sure. Still nothing.
"Did you turn the speakers on?"
"YES, OF COURSE, THE F*#&@# SPEAKERS ARE ON! DAMN IT! JUST WHAT DO YOU.... Oh."
One button later the neighborhood was filled with the sound of music.
They say that music can calm the savage beast.
There has to be a moral in this, somewhere.