1 Starting problems 86 k100 8v Sun Dec 20, 2020 12:27 pm
bigminiandy
active member
Hi all. I’ve been scratching my head over this so hoping somebody might be able to help.
Last time my K100 ran it started and ran perfectly but now doesn’t want to start, other than the fact it was hammering down with rain there was nothing unusual about its last ride.
The bike has spark on all four cylinders, there’s good compression on all cylinders and the injectors are working and spraying nicely. There’s plenty of fresh fuel in the tank and I’ve checked there’s no water in the fuel given how hard it was raining. The engine doesn’t want to run but makes some enormous bangs and has created some incredible flames!
As the bike was ticking over nicely when I arrived back from its last ride I can’t foresee any engine timing issues but I have already done the following: changed the fuel pump for a new one along with a new fuel filter, fuel hoses and fuel regulator. I’ve also replaced the water temperature sensor, changed the ecu under the seat and the air flow meter in the air box. The battery is in great condition and I have a spare which I’ve tried for the sake of it too.
After cranking over for a while I get fuel dripping from the joints in the exhaust - guess this is the cause of the big blue flames! If I unplug the fuel tank/pump the bike makes a small attempt to run but very quickly goes back to popping and banging but no running..... any ideas?
Last time my K100 ran it started and ran perfectly but now doesn’t want to start, other than the fact it was hammering down with rain there was nothing unusual about its last ride.
The bike has spark on all four cylinders, there’s good compression on all cylinders and the injectors are working and spraying nicely. There’s plenty of fresh fuel in the tank and I’ve checked there’s no water in the fuel given how hard it was raining. The engine doesn’t want to run but makes some enormous bangs and has created some incredible flames!
As the bike was ticking over nicely when I arrived back from its last ride I can’t foresee any engine timing issues but I have already done the following: changed the fuel pump for a new one along with a new fuel filter, fuel hoses and fuel regulator. I’ve also replaced the water temperature sensor, changed the ecu under the seat and the air flow meter in the air box. The battery is in great condition and I have a spare which I’ve tried for the sake of it too.
After cranking over for a while I get fuel dripping from the joints in the exhaust - guess this is the cause of the big blue flames! If I unplug the fuel tank/pump the bike makes a small attempt to run but very quickly goes back to popping and banging but no running..... any ideas?