Ray1922

Hiya, Shorting the side stand switch did not produce a spark either, think thats all there is to check now, time for a gallon of unleaded and a match Ray

Ok, thanks for that will try again, as it happens the neutral light is out at present,so need to look at that, however it was working before I started pulling everything apart. This bike is actually my sons,I have a CBR600, so much easier to sort out. Ray

Hiya,Interesting what you say about the sidestand switch. At no time, due to wear I guess, does the cam on the sidestand press the little plunger on the switch mechanism, maybe this could be the problem. I thought that by disconnecting the switch at the plug on the upframe spar that it would render it useless ie, making the engine start wherever the sidestand was, am I wrong in this train of thought? As far as checking the coil resistance goes, I checked the LT wire the little orange one to the earthwires bolted to the coil body, and got a 1 ohm reading, which is about right according to the manual. The HT wire I checked again to the same earth this also checked to the specified resistance rating 5.9 kohms. Going back to the sidestand switch, should the sidestand cam depress the plunger when it is up or down? Ray

Ok, tried disconnecting the ignition switch, still no spark, disconnected the kill switch no spark, disconnected the sidestand switch,no spark, plug sparks ok in another engine so plug looks ok. Anything I am missing here? Ray

Ok thanks will try that tomorrow. Ray

Hi, The ignition switch is brand new, and seams to be working fine, however I do know that even new electrical components especially poorly constructed ones like this can be faulty. What is the theory behind disconnecting it then trying again? Ray

I can only find used ones, is there any way of testing these CDI's? Ray

Hi, I have a 1991 DT 50 MX which will not spark at the plug. I have gone through all the usual checks, coil resistance, plug, all connections, magneto resistance, ignition switch, sidestand switch, kill switch etc. it is the CDI version ignition, and I am thinking that maybe that is the culprit. The bike was starting and running fine, then it would just cut out, then start straight away after. Now it will not spark at all, any ideas anyone? Thanks in anticipation Ray