1 bmw k100rs Tue Dec 03, 2013 2:15 pm
tufty666
active member
hi everybody. had my rs in dads kitchen 4 2 weeks and still got no spark. i really need some help as iv done all i can, with no joy. symptoms. started 2 cut out,rev counter flickered, all the ignition side of the lights also went out. next day, started fine. did 2 miles then stopped again. got it home on the truck, and then started fine again.took tank off and wiggled wires, but bike would not die. then seemed 2 find fault. the 5pin connector from the hall sensors. wiggle it hard and no change. but tap the connector with a pencil lightly, and the fault occured.engine died. press starter,ran fine again, tap ever so lightly the connector and it stalls spluttered and died. i cut the wires and made 5 solder joints, well insulated,and now have no spark at all. changed hall sensors twice, changed ecu and fi box, still no spark. with hs disconnected, i get a reading of 12v on the red wire and also 5v on the orange and brown wires. with hs plugged in, i lose the 5v on the orange wire on both replacement hs units. fuel pump ok, cleaned all live and earth points i could find, cleaned ignition switcg and kill switch. changed alternator and starter motor brushes. am i missing something simple, or do we think hs units. auto electrician said he could not detect a pulse from the orange side of hs unit. would 2 2nd hand hs units both b faulty? if i had 2 guess, i would go 4 a live or earth fault, as the supplier of the hs unit tested them b4 posting. i would like 2 say the next post i send will b full of good news. lets hope so. cheers