I was following the recent thread closely as my 2003 twin spark also won't start; as Rob seems to have left us in the lurch, I'd be really grateful for any help.
A little background...
I recently did a slow speed riding course which was really enjoyable until I stalled it (3 times!) on the tight section of the "advanced" obstacle course. No problem, its a BMW and instantly restarted.. twice. The battery was soft anyway and had been on charge the night before, so thinking the morning's efforts had proved too much for it, we clamped on the jump leads and hit the starter button at which point the starter motor started smoking. Trailered bike back home and removed the starter, then stripped and refurbed using the excellent Mike P thread. As per the thread, the grease retention plate in the starter had worked loose and shorted out, but luckily wasn't holed, so I cleaned up all the parts, lubricated everything, rebuilt it and bench tested it to confirm all was OK. One rebuilt and lubricated starter re-fitted, hit the button and the engine turns over faster than before but doesn't even try to fire.
As above, the bike is a 2003 Twin spark.
Refering to Steptoe's advice:
I've pulled the fuel pipe from the injector and can confirm I DO have a fuel supply.
I've also pulled the electrical connector from the injector and can confirm I DO NOT have a signal at the injector.
I also have NO SPARK at the plugs.
All fuses are OK.
All relays are OK.
I fitted a new Motobatt battery before refitting the starter motor.
There are no loose plugs or connectors.
Everything else still works, lights, horn etc.
I also found another thread which recommended removing fuse 5 for 10 minutes then going through the throttle/TPS routine to reset the Motronic. This made no difference and it still won't start.
The bike was running really sweetly until this sudden stop. As I've lost both electrical signals to the plugs and the injectors, I'm currently thinking along the lines that the multiple stalls were enough to shake the grease retention plate loose, causing the short. Then the high current draw when the jump leads were attached has FUBARed something else. HES? Motronic? This is hopefully just my paranoia and somebody can can set me right?
Any assistance would be very much appreciated and I promise not to leave people hanging once the solution is identified!
Thanks in advance,
Mac
A little background...
I recently did a slow speed riding course which was really enjoyable until I stalled it (3 times!) on the tight section of the "advanced" obstacle course. No problem, its a BMW and instantly restarted.. twice. The battery was soft anyway and had been on charge the night before, so thinking the morning's efforts had proved too much for it, we clamped on the jump leads and hit the starter button at which point the starter motor started smoking. Trailered bike back home and removed the starter, then stripped and refurbed using the excellent Mike P thread. As per the thread, the grease retention plate in the starter had worked loose and shorted out, but luckily wasn't holed, so I cleaned up all the parts, lubricated everything, rebuilt it and bench tested it to confirm all was OK. One rebuilt and lubricated starter re-fitted, hit the button and the engine turns over faster than before but doesn't even try to fire.
As above, the bike is a 2003 Twin spark.
Refering to Steptoe's advice:
I've pulled the fuel pipe from the injector and can confirm I DO have a fuel supply.
I've also pulled the electrical connector from the injector and can confirm I DO NOT have a signal at the injector.
I also have NO SPARK at the plugs.
All fuses are OK.
All relays are OK.
I fitted a new Motobatt battery before refitting the starter motor.
There are no loose plugs or connectors.
Everything else still works, lights, horn etc.
I also found another thread which recommended removing fuse 5 for 10 minutes then going through the throttle/TPS routine to reset the Motronic. This made no difference and it still won't start.
The bike was running really sweetly until this sudden stop. As I've lost both electrical signals to the plugs and the injectors, I'm currently thinking along the lines that the multiple stalls were enough to shake the grease retention plate loose, causing the short. Then the high current draw when the jump leads were attached has FUBARed something else. HES? Motronic? This is hopefully just my paranoia and somebody can can set me right?
Any assistance would be very much appreciated and I promise not to leave people hanging once the solution is identified!
Thanks in advance,
Mac