I put together a 49cc motorized bicycle about a year ago and has run fine since.
All wiring seems fine, but not getting any spark to plug. How do I check ou the CDI etc
Thanks
How did you determine that it has no spark?
Tell us what you did to check.
What I would do is... Take out the spark plug & put the boot back on it; Then touch the threads of the plug to the fins on the engine & have someone lift & spin the rear tire so the engine turns over real fast & see if the plug is sparking.