Motorcycle Questions? Ask a Mechanic.
HI and thank you for your question.
It sounds like I am coming in on the middle of your diagnostic process.
From what you said, you have a CB250 that has no spark. You installed a stator and pick up coil and it still doesn't spark.
Have you done any other diagnostic work, or replaced any other parts?
Please do not take this the wrong way but Honda is one of the few motorcycles that will crank with the engine stop switch in the off position. Since it will do that, there could be a problem in the engine stop switch too.
Is this a problem that just popped up all of a sudden?
Have you owned the bike for awhile?
Any and all additional details would be extremely beneficial in honing in on the problem of no spark on your bike.
Thank you for all of that information.
Of the components you replaced, which are used components? I am always worried about used electrical components because you usually cannot visually see they are damaged and non functional.
Also, what country was this bike imported into? The US model,(where I am) does not list any sort of fairings on it. This could be a problem because I only have access to US Honda service information. The fact that your bike doesn't crank with the engine stop switch off makes me wonder what they have done differently on your bike. I did also notice they use a different stator for the CB and the CMX. If that was not a new part, it could potentially be an issue as well.
Thank you for the additional information. This question is severely undervalued. From what you have tried and what it is going to take to sort through all of this is going to be extremely time consuming. You referenced fairings which I do not see on the US parts diagram, and said it will not crank with the stop switch turned off. Neither of those make any sense. I will say that you need a peak reading volt meter to be able to test the ignition system components properly. At this point all I can do for you is essentially read the service manual and re-type what it says here. I don't want to come off sounding like a jerk but this is easily well over an hour's worth of work between relaying the information to you, answering questions and interpreting the results and advising the resolution. If you are willing to repost the question to me at a reasonable rate, we can move forward.