Warriorfreak99
Well-Known Member
Seeing alot of no spark threads/posts lately , I understand that there aren't really any straight up procedure threads on here for testing so here goes, anybody else feel free to add your knowledge and please correct me if i'm wrong. First, make sure all your connections are clean and tight. Commonly overlooked, it could be as simple as a bad spark plug. But you'll need a multimeter for testing ignition components, preferably digital. Set your meter to the ohms postition, 2k if your meter has different selections, Ohm your stator (and by ohm I mean touch the positive and ground feelers on the multimeter to each of the contacts in the plugs coming OUT OF your stator, it doesn't matter in which combination) Refer to pages 284-290 of the pdf service manual for correct ohm readings (here: https://www.dropbox.com/s/ocy6wk14vs...350_Manual.pdf), and It may just be me but I have the paperback copy of the manual and I think there are different readings for different years. (fill me in somebody?) The source coil, and pickup coil CAN be replaced separately from the magneto itself if they ohm out of spec, but if it's determined that the entire stator assembly needs to be replaced buy either a stator made by Rick's Motorsport Electrics (Rick's Ricky's are all the same on ebay, $150 is about the cheapest you'll find anywhere) or original Yamaha factory parts (VERY expensive) the $40 stators online are usually junk. If the stator checks out fine, move on to your ignition coil and boot, procedure also listed on pages 284-290 in the manual. If that checks out as well take a look at the pickup on the flywheel itself and make sure its clean and undamaged. If all that checks out it is more than likely your CDI unit, there's no procedure for testing the CDI box other than process of elimination. I hope this helps somebody and like I said before more knowledgeable users feel free to chime in and correct me if i'm wrong and add to it if needed. :atv:
