depends on what scale you use and your multi meter but youd need at least 3-4 volts or the pick up coil is bad, also depends on how fast you pull it over but you get the idea. should show you varying voltage when pulling it over on your meter. if the pick up coil doesnt supply enough voltage to the cdi it wont have spark, this is whats wrong 80% of the time with no spark and the flywheel ISNT rusted. Rusted flywheel... thats usually the problem with a first year start up no spark problem after sitting, the flywheel is rusted and blocks the signal for the pick up coil.