Recent content by tom bauer

OK, post a good picture of all its wires and connectors and I can tell you what it is.

Not compatible unless you really know what you are doing. Looks like you have power spliced into pickup ground, not good.

No, there is only one.

What is the part number from your CDI? That will tell everything.

87 is one of the models that HAS to have a genuine OEM ignition switch as there is NO aftermarket that will work. The Black/Red wire to the CDI has to be grounded to turn the spark on. I have new CDIs for this model it that turns out to be the problem.

https://cdiparts.com/Yamaha%20ATV/yamaha%20atv.html

NEW CDIs are now available for 87 95 Big Bear, Moto-4, Warrior https://cdiparts.com/

what does a later one gain for you? is $220 too much for a new one with a 1 year wtty?

For quite a while new CDIs for 87 to 95 (1YW-20 and 2HN-10) have not been available. Now there is an exact fit replacement that keeps all the OEM features. https://cdiparts.com/ $220

cdi new cdi are available for 1987 to 1995, https://cdiparts.com/ or look on ebay

start by grounding the yellow/black at the CDI, cut off relay clicks and puts power on the blue/white wire? Starter relay is then getting power on that blue/white wire? Start switch grounds the red/white wire and engine cranks. Normally it must be in neutral or brake on. This all goes thru CDI.

https://cdiparts.com/

most likely stuck to a magnet on the flywheel.

Cdi repair You could simply get your OEM CDI repaired. Ad on ebay. Cheapest way.