The engine will run for about mins then cut out on my 13,000 mile 2002 bike. There is still a spark (on a plug tester) and there is still petrol coming out of the petrol tap (which is a vacuum operated affair). Would there still be a spark if the rectifier/CDi was broken?
Thanks,
Pete.
How do you temporarily resolve the problem Pete?
Do you re-charge the battery or ???
Does it still crank the engine over with the electric start while in the 'failed' state after the 30 min run, just not fire the engine?
Are you doing the spark test with the electric start or kick start?
If charging the battery makes it run OK again for the the 30 mins, that is indicator the charging system is bad and you are running in 'total loss' mode of the battery. When it becomes discharged there is insufficient power to run the bike. You may still have enough power to pass a spark test if tested briefly.
If you can measure the voltage across the battery when the bike is running, that would identify whether the charging system is good - you should get at least 13.5V at the battery.
If not, you may have a stator and/or regulator/rectifier failure.
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