Hi everyone
I've got a problem which has me stuck so it would be great if someone could help. I brought a mc11 ns250r which needed a bit of work to get it back on the road, got it all done took it in and got a wof, when i got the bike back it was only running on one cylinder so checked the plugs and they were both the wrong ones so I replaced them and it went well for a bout 3 days then started running on one cylinder again, so i took the boot of the spark plug and put it back on and it was fine again, did this a couple times to get home and then the next day i started it to see if i could work out what was wrong but only one cylinder again. since then i havnt been able to get it to run on 2 cylinders. so enough with the story. The things i have checked are: it is getting fuel/air, and it has compression and the other cylinder works fine. I shorted the spark plug lead slightly (to get rid of any corrosion) and re-screwed the end back in but this didnt help at all. The spark plug puts out no spark (have tried with one i know works as well) the lead will ark to the frame when its turned on but there is no spark plug on it. The other cylinder runs fine, but when the resistance is measured across the wires before the coil (with the coil un-pluged) the one that goes gets about 37killer ohms (i think, might be out by a magnitude of 10 or 100) and the one that dosent go, gets a reading of about 157killerohms (again may be out by the same order of magnitude) when the voltage is measured across the frame and the spark plug lead it measures about 0.96 volts.
Dose anyone have any ideas? or more tests I could do?
thanks for any help
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Originally Posted by chelseapar
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