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Hope you'll understand my problem, english is not my first language...
I have no spark on my CRF230F. I bought a new spark plug, a new coil... unplugged the kill switch.. still no spark.
I just rode my bike once this summer. I had somme problem to start it, but I thought it was because it was its first ride after being in the garage during winter.
My brother wanted to take my bike 2-3days after my first ride and it didn't start. He bought a new sparkplug and the bike started well.
I tried to take it for another ride a week after and no spark... since this, we changed the coil, bought new sparkplugs, unplugged the killswitch...still no spark.
Yesterday, I checked the fuse. The "cap" on was a little loose. The fuse was OK. I put the cap back on and... miracle.. Spark!!
This morning, I tried to start my bike again.. no spark...

Still no spark on my crf230f... I foud the wiring diagram on the Internet. My father checked all the wiring and everything looks fine.

Since my last post, my bike made 2 little spark.. but nothing big...

We don't know what to check anymore to find the problem.

I asked the previous owner and she never had this problem before.