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Recent Forum Topics
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21
1989 Moto 4 YFM350ERW intermittent spark.
Well it remains a mystery.. Your VIN says it's a 89 model, and when I look up parts the 89 stator has the two bullet connections. The wiring diagrams suggest that the big-bear FWW(89) might have the right stator, but when I look up parts online none of the BB have the two bullets.. The FWW(89) Big-bear wiring diagram shows what looks like your wiring according to your description.. Whether you should rely on the 89 BB specs is to be ascertained yet.. Good luck, FYI. Yamaha designate models years with the last digit of the suffix.. So the last suffix digit W is for 89, U is 88, T is 87, and 90 is A, 91 is B, 92 is D. The VIN numbers use K is for 89, J is 88, H is 87, and 90 is L, 91 is M, 92 is N. Moto-4 to BigBear.pdf -
21
1989 Moto 4 YFM350ERW intermittent spark.
Yeah I got that, but thanks for clarifying. So it seems you must have the 90 electrics. The Vin year numbering protocol has K for 89 and L for 90. We have to watch out though when looking at yamaha model suffix designations because they use W for 89 and A for 90. It gets confusing. Anyway.. The parts say that from 90 on the cdi and stator gets shared with other Moto-4 and Bigbears. That being the case, and since the stator fits a 91 big bear, this should be the same wiring, and hopefully the specs for diagnosing would be the same. I'll have a look in a 91 bigbear manual later, but if you are downloading(one more post I think), then get the BB as wiell as the Moto-4 manual and have a look. The ignition should be the same, the wiring for the rest of the bike may vary.. not all bikes have brake lights for instance, and the start circuits vary. BigBear350-91.pdf -
21
1989 Moto 4 YFM350ERW intermittent spark.
When I said the gray wire was missing it is the one on the stator. The one on the CDI is still there. -
190
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21
1989 Moto 4 YFM350ERW intermittent spark.
Will try and confirm the VIN on the frame but the title says JY43HPW05KC000565. The wire colors on the ATV side of the CDI match the 1990. The wire colors on the stator side of the CDI match the 1988 except that the 4 pin connector is missing the grey wire. -
21
1989 Moto 4 YFM350ERW intermittent spark.
Frame JY43HPW0*KC000101 Engine 3HP-0000101 Model 1989 YFM350ER W Moto-4 JY43HPW0*LC024101 3HP-0024101 1990 YFM350ER A Moto-4 JY43HPW0*NA049101 3HP-0049101 1992 YFM350ER D Moto-4 JY43HPW0*PA059101 3HP-0059101 1993 YFM350ER E Moto-4 JY43HPW0*RA070101 3HP-0070101 1994 YFM350ER F Moto-4 JY43HPA0*SA080101 3HP-0080101 1995 YFM350ER G Moto-4 -
21
1989 Moto 4 YFM350ERW intermittent spark.
Yeah the switch is like the 90 model. So the atv's plug shape and colour should match the stator's, and they should match the wiring diagram in that pdf "output", where the 90 is the ERA. The wire colours should probably match too, but, I have followed along in here when people have used parts with the right plugs but a wire or two different coloured. -
19
Oxidized or faded plastic body parts
Any of the methods work very well, sand and polish works good but it will need to be kept inside because it will oxidize again if you dont keep it polished. I have found the best way with little maintenance is to go through the cleaning and polishing steps and then clear coat it. I have tried painting and i think it is a good option if you use good automotive quality paint but rattle can paint doesnt seem to hold up. Like i said i have tried it but i prefer the sanding and polishing method. It seems more natural. -
21
1989 Moto 4 YFM350ERW intermittent spark.
When I check my main switch in the off position the ground pair is shorted together and the power pair is open. When in the on position the ground pair is open and the power pair is shorted. Not like in the schematic for the 88 but like the one for the 90. The main switch is original. In fact the only thing that I have changed out is the coil and that is because the secondary was open on the original. This Quad has been in the family since the late 90's and had very little use when purchased. My father used it to get around our property and plow some snow in the winter so has not had rough use and has need very little other than routine maintenance sinch we have had it. Almost done with the carburetor just waiting on Amazon and then will try to get back to the electrical. We will be traveling in a couple of days so it might have to wait until I get back. -
19
Oxidized or faded plastic body parts
Do any of these methods work on high density poly ethaline. I have 1982 husky fuel tank that is all faded.
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