1 1985 K100RS smooth til I wide open the throttle Thu Jul 20, 2017 10:45 am
skidz449
active member
I've had this bike (1985 K100RS) for a month or so and it has performed beautifully til last week. The bike starts and runs smoothly at all speeds if I open the the throttle in moderation. But this past week in passing situations, or if I just want to feel the thrill and thrust of this 4 cylinder machine, I quickly open the throttle to the full on position and the motor craps out and jerks like it is running out of gas. Roll the throttle back and it runs fine again and will smoothly accelerate to 6000 RPM if I'm gentle with the throttle.
Feels as though the fuel supply can't keep up with the instant demand. So far I have changed the fuel filter, air cleaner, spark plugs, cleaned the injectors, run another tank of fuel (with injector cleaner). No change.
I live in Nicaragua now and I would be willing to bet that I own the only bike of this kind in the entire country! Parts may be hard to come by, but I have found a shop with some diagnostic equipment that is willing to help, he is a Mercedes mechanic with very little motorcycle experience. They sell Chinese made 150cc machines here by the boatload, but big bikes are very rare and very expensive, so I was really happy to find this beauty at a price I could afford. I have been riding and maintaining carburated V-twins for more than 20 years, but this is my first fuel injected bike, so I'm a little out of my depth. Any ideas on the most likely item to check, test, or change next will be appreciated.
Feels as though the fuel supply can't keep up with the instant demand. So far I have changed the fuel filter, air cleaner, spark plugs, cleaned the injectors, run another tank of fuel (with injector cleaner). No change.
I live in Nicaragua now and I would be willing to bet that I own the only bike of this kind in the entire country! Parts may be hard to come by, but I have found a shop with some diagnostic equipment that is willing to help, he is a Mercedes mechanic with very little motorcycle experience. They sell Chinese made 150cc machines here by the boatload, but big bikes are very rare and very expensive, so I was really happy to find this beauty at a price I could afford. I have been riding and maintaining carburated V-twins for more than 20 years, but this is my first fuel injected bike, so I'm a little out of my depth. Any ideas on the most likely item to check, test, or change next will be appreciated.