Motorcycle Repair: cr 80 fouling, cdi ignition, cr 80

Question
i just bought a cr 80 and when ever i ride it the plug will foul... (it will foul from 30 seconds to 3 hours) (litterally)

is there a problem with the jet engine settings or do i need a new cdi ignition??

Answer
First check that you are using the correct oil/gas mixture for your bike.  Then I would verify the jets in the carbs have not been messed with; this can also cause plug fouling, then lastly you may need to check the piston rings and cylinder for scoring.  Loss of compression can also cause plug fouling.  I would not imagine the ignition will be the problem, it either works or doesn't; and it sounds like yours works.  Good luck,

Jan