Stator & Magneto Parts
About Stator & Magneto Parts
The stator or magneto cover is the case on the side of the engine that holds the charging coils and the flywheel. This category lists the small parts around it: stator cover and magneto cover gaskets for Polaris, Yamaha, Suzuki, Kawasaki and Honda machines, a Yamaha source coil, and an adjustable stator plate. Oil leaking at the cover or a worn coil is what sends most owners here.
Replace the gasket every time the cover comes off, and clean both mating surfaces before fitting the new one so the cover seals without leaking oil. A source coil is one of the coils on a stator that supplies the ignition, and the listing here is for a Yamaha, so match your make, model and year. An adjustable stator plate lets the ignition timing be set by hand. That is a tuning part for a specific engine, so follow the maker's timing instructions after fitting it.
Brands on this page include Cometic, Pro Design and Rick's Motorsport Electric. If the whole stator has failed, see Stators & Magnetos. Related parts are Ignition Coils and Voltage Regulators & Rectifiers, in Electrical & Ignition Components.
FAQs on stator covers, gaskets and coils
Do I need a new gasket every time I remove the stator cover?
Yes, replace it every time the cover comes off. Gaskets compress and can tear when removed, and a reused one may leak oil. Clean both surfaces, fit the new gasket dry or with sealant only if the manual says so, and tighten the cover bolts evenly.
What is a source coil on a stator?
A source coil is one of the coils on the stator that produces the electrical power the ignition system uses. If it fails, the engine can lose spark or run poorly even when the battery and plug are good. Match the replacement to your machine's make, model and year.
What does an adjustable stator plate do?
An adjustable stator plate allows the position of the stator to be shifted, which changes the ignition timing. It is used by tuners on certain engines. Set the timing to the maker's specification, because incorrect timing can cause poor running or engine damage.
Is oil seeping from the stator cover a problem?
It is worth fixing. Oil at the cover usually points to a worn gasket or a loose bolt, and oil reaching the stator can damage the windings. Check the oil level, and replace the gasket and torque the bolts evenly to the manual's figure.
