Yes it’s real. No it isn’t the same as the CDI. Dear ATVC: I have a 2002 Yamaha Big Bear 400 with electrical problems. I am trying to find out the purpose of the Motor Control Unit. It is different from the CDI box and I am trying to determine whether or not it’s functioning […] More »

Weak, yellow spark from a fouled plug. Dear ATVC: I think I have a problem with the coil on my Suzuki LTZ. I have viewed a lot of pages but can’t find an exact answer or advice on how to check somehow. The sparks off the plug is yellow and seems weak. The engine doesn’t […] More »

Let the diagnostics begin! Dear ATVC: My 2006 Yamaha Bruin 350 4×4 was running fine for the longest time. Slowly it started having more and more trouble starting until finally it won’t start at all. I tried the pull and electric start and nothing happened. I pulled the spark plug and found it wasn’t making […] More »

Honda’s still got your back. Mentalblock Dear ATVC: I have an 86 Honda TRX350 4×4. Anybody know how to replace stock CDI ignition with a system that has better parts availability? We hate to break it to you- but from the ignition key switch to the CDI box to the coil itself aren’t only readily […] More »

Jumping gigawatts! Dear ATVC: I have a 2010 110cc Tao Tao ATV with a recently replaced CDI box and ignition coil. It turns over but will not fire up. I have taken the plug out and have no spark. I am lost I don’t know what else to replace. Any help is greatly appreciated. Deyles01 […] More »

Dear ATVC: I have a 2001 Kodiak that came into my shop that lost spark. I went through the service manual and got down to the point where it says “Replace CDI”. While I guess that would be the route I would go I hate throwing a $300 part at it to see if it […] More »

Dear ATVC: If my ignition was hooked up to all the electrical components on my quad and it the ignition went bad would nothing on the quad work? Njfishermen To answer this question we have to start by reminding that what we generally consider an ATV’s ignition is actually comprised of a few different components […] More »