merseamudboy Posted July 26, 2011 Report Share Posted July 26, 2011 I fitted a racing harness to my 2010 Sherco 2.9. I'll put my hand up and admit I could have done better with the wiring, a lack of decent crimping tools and a hot air gun meant some connections were soldered and wrapped in insulating tape I was riding today when the motor stopped. Fuel was fine and there was no spark at the plug. I tried a new plug but the bike is completely dead. My 1st thought was to check the wiring harness and I discovered that the tape on the yellow wire that goes up from the stator to the headstock was worn bare and this wire was presumably shorting on the frame. Even with this sorted the bike still has no spark Anything I can check? What should be the output to earth on the yellow wire from the crankcase? I wish I had a wiring diagram and I also wish I understood these type of ignition and electrics. Peter Quote Link to comment Share on other sites More sharing options...
copemech Posted July 27, 2011 Report Share Posted July 27, 2011 I fitted a racing harness to my 2010 Sherco 2.9. I'll put my hand up and admit I could have done better with the wiring, a lack of decent crimping tools and a hot air gun meant some connections were soldered and wrapped in insulating tape I was riding today when the motor stopped. Fuel was fine and there was no spark at the plug. I tried a new plug but the bike is completely dead. My 1st thought was to check the wiring harness and I discovered that the tape on the yellow wire that goes up from the stator to the headstock was worn bare and this wire was presumably shorting on the frame. Even with this sorted the bike still has no spark Anything I can check? What should be the output to earth on the yellow wire from the crankcase? I wish I had a wiring diagram and I also wish I understood these type of ignition and electrics. Peter As I do not have a 2010 on hand to ck, last I seen the yellow wire feeds power to fan and lights. I would disconnect kill button and inspect earthe on cdi unit/ coil, install new sparkey. After basic cks. you may be down to cdi,coil or stator plate! GOt any friends? Quote Link to comment Share on other sites More sharing options...
merseamudboy Posted July 27, 2011 Author Report Share Posted July 27, 2011 As I do not have a 2010 on hand to ck, last I seen the yellow wire feeds power to fan and lights. I would disconnect kill button and inspect earthe on cdi unit/ coil, install new sparkey. After basic cks. you may be down to cdi,coil or stator plate! GOt any friends? That would make sense thanks and helps explain a lot about a system I don't fully understand. It does go up to the fan control location tucked up under the headstock. I suspect that effectively shorting this supply has damaged the stator (at least). I've checked the security of the earth on both the coil and the CDI unit already as well as disconnecting the kill switch and it sadly didn't help. Friends yes Friends who really understand such stuff sadly no. Way ahead, other than properly sorting the wiring is probably to check/remove the stator and see if I can get it repaired. Many thanks, Peter Quote Link to comment Share on other sites More sharing options...
tony27 Posted July 27, 2011 Report Share Posted July 27, 2011 Before you remove your stator have a look at the readings splatshop have listed below. Can be done with the connections unplugged but everything still in the bike http://www.splatshop.co.uk/stator-repair-exchange-new-style.html Quote Link to comment Share on other sites More sharing options...
geebee Posted July 27, 2011 Report Share Posted July 27, 2011 Hi Check for corrosion build up between stator coils and flywheel. I had a stator meter out perfect but no spark. I cleaned off the corrosion and all was fine. Geebee Quote Link to comment Share on other sites More sharing options...
ham2 Posted July 27, 2011 Report Share Posted July 27, 2011 Hi Check for corrosion build up between stator coils and flywheel. I had a stator meter out perfect but no spark. I cleaned off the corrosion and all was fine. Geebee Where exactly..what did you clean it with? Wayne Quote Link to comment Share on other sites More sharing options...
copemech Posted July 28, 2011 Report Share Posted July 28, 2011 That would make sense thanks and helps explain a lot about a system I don't fully understand. It does go up to the fan control location tucked up under the headstock. I suspect that effectively shorting this supply has damaged the stator (at least). I've checked the security of the earth on both the coil and the CDI unit already as well as disconnecting the kill switch and it sadly didn't help. Friends yes Friends who really understand such stuff sadly no. Way ahead, other than properly sorting the wiring is probably to check/remove the stator and see if I can get it repaired. Many thanks, Peter As this bike is not old, I still have reservations about the stator. Chewy did report a failed coil pack on his, yet seems rare, but If you have no close friends to swap parts off a similar year bike, then contact someone like Splatshop Chris to sent you off a package of bits to isolate the problem. He will only charge for what you use. You may ohm things out, as stated, but prooblem is we have no way of functionally testing erratic hall effect units on the stator on a dead bike! Quote Link to comment Share on other sites More sharing options...
merseamudboy Posted July 28, 2011 Author Report Share Posted July 28, 2011 As this bike is not old, I still have reservations about the stator. Chewy did report a failed coil pack on his, yet seems rare, but If you have no close friends to swap parts off a similar year bike, then contact someone like Splatshop Chris to sent you off a package of bits to isolate the problem. He will only charge for what you use. You may ohm things out, as stated, but prooblem is we have no way of functionally testing erratic hall effect units on the stator on a dead bike! Steve at MotoPlat doubts the shorting of the coil and auxiliary supply would lead to a ignition problem. I'm too busy to get some time with the bike until next week but I'll do the checks he suggested and if it seems okay I'll get onto Splatshop. I don't want to jump to conclusions but when I saw the bare wire under the frame I probably did. Peter Quote Link to comment Share on other sites More sharing options...
copemech Posted July 30, 2011 Report Share Posted July 30, 2011 Steve at MotoPlat doubts the shorting of the coil and auxiliary supply would lead to a ignition problem. I'm too busy to get some time with the bike until next week but I'll do the checks he suggested and if it seems okay I'll get onto Splatshop. I don't want to jump to conclusions but when I saw the bare wire under the frame I probably did. Peter Completely understand, yet as these things go, other than basics mentioned, we have no true way of functional testing of these components in the field, other than component swapping and isolation of the faulty part via that method. Quote Link to comment Share on other sites More sharing options...
merseamudboy Posted August 1, 2011 Author Report Share Posted August 1, 2011 Completely understand, yet as these things go, other than basics mentioned, we have no true way of functional testing of these components in the field, other than component swapping and isolation of the faulty part via that method. I did a multimeter test of the stator today and the readings to earth from brown and black were low, with both orientations of the probes on the diode setting. I've ordered a replacement stator We'll see. Peter Quote Link to comment Share on other sites More sharing options...
merseamudboy Posted August 5, 2011 Author Report Share Posted August 5, 2011 I did a multimeter test of the stator today and the readings to earth from brown and black were low, with both orientations of the probes on the diode setting. I've ordered a replacement stator We'll see. Peter Fitted the reconditioned stator - still no spark. I suspect it's the coil or CDI unit, bike with dealer who will have a look. Peter Quote Link to comment Share on other sites More sharing options...
copemech Posted August 6, 2011 Report Share Posted August 6, 2011 Fitted the reconditioned stator - still no spark. I suspect it's the coil or CDI unit, bike with dealer who will have a look. Peter Well, you tried. Do report the findings, please, as things go it may yet help others. Quote Link to comment Share on other sites More sharing options...
merseamudboy Posted August 13, 2011 Author Report Share Posted August 13, 2011 Well, you tried. Do report the findings, please, as things go it may yet help others. I will do, the bike is currently with Triple D in Kendal and when they get a moment they will take a look at it. I'd go for the CDI unit myself, the coil resistances checked out okay. Peter Quote Link to comment Share on other sites More sharing options...
merseamudboy Posted August 22, 2011 Author Report Share Posted August 22, 2011 I will do, the bike is currently with Triple D in Kendal and when they get a moment they will take a look at it. I'd go for the CDI unit myself, the coil resistances checked out okay. Peter In the end it was the stator after all. I'm far from certain that the reconditioned one I fitted was in fact a repaired one? Peter Quote Link to comment Share on other sites More sharing options...
copemech Posted August 23, 2011 Report Share Posted August 23, 2011 In the end it was the stator after all. I'm far from certain that the reconditioned one I fitted was in fact a repaired one? Peter Hummm, thanks for the report! Does make you wonder? Seems the re built ones from WCW have been a bit iffy? Where as Steve has been spot on in most cases, although as with anything I am sure he is not perfect as things go. Quote Link to comment Share on other sites More sharing options...
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