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Dirt Bike Discussions By Brand
Dirt Bike Brands - Other
stator question
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[QUOTE="steve.emma, post: 1182051, member: 36039"] it is very hard to diagnose a weak spark however testing the stator output and spark output are 2 completely different things. the stator output can be measured using a multimeter on a a/c voltage scale, to do this you need to have the stator disconnected from the coil and cdi unit and the bike needs to be kicked over fairly quickly (best done with plug out..). the a/c voltage will fluctuate depending on kicking speed and to be honest unless you have a "good" bike to compare to (or a lot of experience) then the voltage figure will only be a rough indication. the h/t spark is generated by the coil which is powered by the stator, spark dwell is controlled by the cdi. the pulsar coil is used to give a timing reference to the cdi. both cdi and coil could also be the cause of weak spark as could h/t lead, plug, electrical wiring and frame/ coil ground connections. you need to check each of these, especially the frame to engine and frame to coil grounds as these never get looked at and are prone to corrosion. sometimes weak spark can be diagnosed by reducing the plug gap and seeing if your hard start condition goes away (smaller gap is easier for a weak spark to jump etc..) also as a last point weak air/fuel mixture is often the cause of problems like you describe, are you sure the carb choke circuit is working etc?.. does the bike have crankcase vacuum leaks? weak spark would make a bike hard to start but its fairly uncommon and hard to check for, so you need to check the basics first. p.s. 2 easy ways to remove flywheel nut..... first use an impact gun, or if you dont have one try removing spark plug get some rope/cord that you can feed into the combustion chamber through the plug hole, then as the motor is turned it will jam up on the rope and let you undo the nut without harming the engine. i dont need to say make sure you get all the rope out when you're done do i...... :blah: [/QUOTE]
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Dirt Bike Discussions By Brand
Dirt Bike Brands - Other
stator question
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