hey guys just wanted to add that a customer came in today with a non starting engine, i knew it was the cdi, so off i went to examine, dc.ed the killswitch and tried , no go, then changed the magneto coil, and wallah!!!! once again the 2 stroke comes back to life....varooooommmm!!! also blew a gasket the other day , head bolts came loose but didnt tightten them down before riding again and so boom,,,the head gasket went, and thats it.... changed out and off i went again !!!! I TRULY BELIEVE THAT THE MAGNETO COIL, IS THE CULPRIT MOST TIMES WHEN YOUR ENGINE WONT FIRE, BE IT NEW OR NOT, SOMETIMES MOISTURE WILL FORM WITHIN YOUR CASE OR EVEN THE OUTSIDE AND BECUZ YOUR WIRES RUN DIRECTLY TO THE COIL , IT WILL ALMOST DEFINATELY LEAD ANY MOISTURE ALONG THE CABLE, WHICH IS DIRECTLY CONNECTED TO THE ENGINE VIA blue black and white cables... thisis very imprtant to keep dry, once wet your engine wont fire ever again !!!!! if you have spark but wont start or fire, then check this immediately ..... if you didnt know this it can really do your head in badly..... no joke!!! spark is spark, question is is it strong enough, and is it constant ? just cux you have soark doesnt mean its strong enough to ignite engine...../