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Similar Forum Topics
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By RGS
1989 Moto 4 YFM350ERW intermittent spark.
Quad has set for about 7 years and was running when parked. When I replaced the battery and attempted to start it had no spark.
What I have done. Followed troubleshooting in the manual.
1. Coil failed the resistance check so I replaced it. Still no spark.
2. I performed resistance checks on the stator and they all pass.
3. Found a bad rear brake stop switch and unplugged it and connected the wires in order to disable. Now I have intermittent spark. I believe that the issue is with either the stator or CDI and not sure which.
1989 seems to be a transition year for electrical. I can get new aftermarket CDI units for 87-88 and 90-94. I cannot get ones for a 89. I can get new stators for 87-89 and 90-95. Looking at the schematics the wiring on my moto is closer to the 90 ones on the ATV side of the CDI and closer to the 87-88 on the stator side of the CDI. Looking at part supply sources the stator housing is the same part # for all the years and looking at some of the stators on Amazon that have the dimensions on them both of the stators are the same size.
What I am thinking of doing is to replace the stator and CDI with a 90-95 one as these parts are all readily available. Does anyone know if this has been tried before and if there are any issues with doing this.
As a side note I also have a 1993 Moto 4 YFM350ER that has been sitting longer but it is located about 400 miles from me at this time. By doing this change in addition to being able to get parts I will also have 2 ATV’s that are the same electrically.
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By BuckBilly
I like to ride in wooded and grassy areas. It takes my mind off the everyday routines and helps me deal with my father's cancer. Also gives me a reason to get involved with forums like this one.
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By KSIM
View File 2018 CF-MOTO Z-Force CF1000US-2 service manual
CF-MOTO Z-Force (CF1000US-2) (2018) service manual
Submitter KSIM Submitted 03/19/2025 Category Other Brands UTV
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By P_syko
I’m brand new to 4 wheelers and just bought a 1987 Yamaha Moto 4 350. It has good compression and fuel, but no spark. I’ve looked high and low trying to find how to test all the components of the ignition system, but can’t find anything. This has a new CDI box on it, but I suspect it might be the stator. How do I test the stator on this? Any help would be greatly appreciated!
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By TravisM
2001 bayou 220 KLF220A
Need some help putting a new ignition switch on this thing. I'm not finding homes for all the wires. I can hook up the white wire and brown wire, But the switch has a B/W and Solid Yellow wire i can't find a home for, and there aren't any more wires in the vicinity from the harness that match this, except one red wire with a double female end crimped on, and a few B/Y grounds. None of the wiring diagrams i've founder or have been given match.
I'm also wondering if i have the wrong switch? some switches appear to have 4 wires and other just 2, the Brown wire and a White wire.
I'm at a loss here. Thanks.
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