thatoneguy12345

I can confirm the quad is fully up and running now. Thanks Everyone. I have two follow up questions. Is it normal the charging voltage output is only 13.5V? Is it common that the neutral lights go out? I can still start it, which means it has to be in neutral, but the light has gone out. Any thoughts?

Welllllllll I got my new 500 ohm pickup and got it installed. I got spark back!! I was able to get it to run on starting fluid. Immediately after it started running though the gasket failed on teh stator cover and left a nice puddle on the floor. lol. Now time for permatex!! Thanks Everyone! I will post again when I finally get it all up and running and make sure the spark stays.

I cut the White/w green line and the white with red line about 2 inches outside of the stator housing. Still nothing, open circuit. I have purchased one of the parts from Ricks and will install later this week when the gasket and pick up coil come in. Any tips/tricks for the housing? It looks like there is a clutch adjustment nut on the side of the housing.... ( I think that is its purpose). Its a threaded end with a slot and a nut on it. Housing has a decrease/increase arrows. Does it have to be removed entirely prior to opening the housing?

Definately pretty different. The plugs don't match either for the CDI. The 2 plugs are a 8 pin and 4 pin. For what ever reason, they have 7 in the 8 pin (there is a yellow/black wire hidden in that picture. ONly one pin is empty) and in the other 4 pin, 3 wires are there. All three are from the stator/pickup and the other wire is in the 8 pin plug.

My multimeter has a continuity checker which sends an amerage through it to see if it comes back. If the two W/R W/G were still whole it should have beeped. It did not beep as it does even with extremely low resistance. Based on what you were mentioning that it should be extremely low resistance, that would be approximately the same resistance as 1 ft of 12 gauge copper wire (1.5ohms per 1000 ft). It beeps with this test of copper wire. I plan on opening the stator cover tomorrow and check much closer to the pickup. Any tips/tricks for opening this cover? Could not find a youtube video for this particular year. Seems like this ATV is a tad of a frankenstien. NRA could you post the wiring diagram/manual for this ATV? Seems like as I continue to have to do other maintenance I will continue to run into a lack of documentation.

Thanks team! I will work on replacing the pickup coil. Has anyone heard of parts by a company called "DB Electrical" https://www.amazon.com/gp/product/B0081S8OP6/ref=ox_sc_act_title_2?smid=ATVPDKIKX0DER&psc=1 The RIcks coil is about the same price as the one above. I had a Kawasaki Vulcan where I had to replace the pickup coil. One of the modifications that was made based on forum recommendation was to relocate it closer to the pickup on the flywheel. Is there a recommended distnace to measure between the flywheel and the pickup iron core itself?

Here are some other images of various plugs etc on this atv. There are 10 wires that go into the CDI. 3 in one plug and 7 in the other. I checked them all for voltage when the ignition switch was on. I had 11.9 volts on one wire and 0.4 V on another wire. Battery was reading 12.25 at source.

NRA4Life, on the white plug in the image below, I have 300 ohms between the left (brown and green). I have nothing on the right which is the two white/red white/green wires. Is this the VR sensor that has gone bad? From what I can find online the stator and VR sensor (pickup) were made together.... Any thoughts?

Is there an aftermarket stator/vr sensor available if that is the problem? I can't seem to find anything as a replacement.....

Let me try and get some pictures/details tomorrow. Right now, from the side of the engine, there are 7 wires. 3 white wires go to the rectifier. The other 4 (red, green, white/red line and white/green line) go into a single plug that then go somewhere into the bigger harness all taped together. If I measure Ohms across the green/red there is 300 ohms, but the other 2 wires have nothing. When you mention the ignition switch, are you referring to the start button itself? I replaced the ignition coil already with a brand new OEM. Is the VR sensor/stator all a single assembly? I'm assuming 2 of the 4 wires are for the vr sensor, but not sure what the other 2 would be for. Looks like only one pickup (vr) is used on this engine.

So based on the VIN, and a few decoders it comes back as a YM350UB. I believe this lines up to the UL version. Is there a diagram with colors for this one available? When I try and start the atv, start button does engage the starter, so I'm assuming that means all of the relevant systems to the starter are good to go? Is this fair? Am I only needing to chase the coil, magneto pickups and CDI itself? Is there something else, another relay, that is triggered after the starter to allow the CDI/pickups etc to function and fire the coil? Are there anyways to test the CDI through the PINS? They are $500 now for a new one and awfully expensive to replace unless I'm absolutely sure its bad. For the history, this bike was ran 2 years ago without issue. Parked in a non heated sealed barn. When they took it out this summer, new battery, no spark no start.

Hello All, Just got my hands on a project ATV. Its a 1999 yamaha big bear 350 2 wheel drive only. I thought I had a manual to diagnose everything, but the numbers are not seeming to match the manual I found online. I have replaced the coils based on the original diagnostics I completed. I can not seem to find an accurate manual for this bike. Anyone help? I'm trying to get a wiring diagram that actaully matches the correct wire colors on this bike to assist in diagnostics. Thanks!