Running problems: chinese 48cc

[jocoman]

Well, here is where I am now. Re-checked the carb, and i am convinced it is good. I had a sparec CDI and I swapped it in. The bike ran batter(i.e.longer), but then it just cuts out! Starts up and i can keep going. But every once and a while it just cuts out! very frustration. I am back to thinking it is in the magneto. I looked at the spark by grounding to the block and pulling the starter. It was a bright white light, definitely not blue. So what could be wrong with the magneto? Do magets loose their magnetism?
Thanks everyone

 

[Mountainman]

maybe as it heats up tolerance changes between mag and coil

can you adjust out a little ?

need some space in THING -- so as to make proper spark

just guessing here OK ?

sounds like for sure -- elect problem

I used to repair a lot of small engins by cleaning rust off coil -- thus better spark
this is an important area so as to be correct

ride that THING