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Hi all, I was gifted this Bayou but she's been sitting quite some time. It won't crank using the factory start button but when I jumper the starter solenoid it cranks but there is no spark. The key has power coming in on the white wire and when turned on supplies power to the brown wire coming out.
I guess I should start with testing the pickup? I heard I may be able to jumper the wires coming from the pickup with an LED bulb and it will flash? I noticed in the manual that it should have around 110 ohms resistance so I'll check that as well. One thing I noticed was that the starter circuit relay has power on one of the black wires with the key on- this doesn't seem normal as I'm assuming the black wires are grounds? I think one of them comes from the start switch, travels through the starter circuit relay and then grounds the starter relay?
Mine is a 1991 so it has the 7 wire CDI (ignitor) and a 2 yellow wire alternator ( as opposed to the later 3 wire type ) with another 2 wires for the source coils (black & red wires ). The pickup wires are blue and black I do believe. Any help appreciated and yes I will test the pickup ASAP.
I'm trying to understand how the system works and I don't understand what the yellow / red wire from the kill switch does- I assume it gets grounded when the kill switch is "on" and therefore grounds the CDI so it can't activate the ignition coil? I noticed in the diagram that that yellow / red wire looks like it may be grounded by the ignition key switch when in the "off" position?
I also don't have 12v power at any of the wires going into the CDI- doesn't the CDI need to be powered? I also read on this forum that someone used a GM HEI module in place of the factory CDI just to test it for spark- does anyone have any info on that?
I hope I'm not missing something simple!
Here is a link to the diagram for my bike (which was posted by another user): https://www.quadcrazy.com/atvforum/topic/13742-1988-bayou-220-lost-spark/?tab=comments#comment-101193
Any help appreciated!
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.
Hows evryone feel about blasting around in snow ?
I love it usually after all plowing is done ill drop the plow and just go lut and have fun. From drifting all over lol to packing snow trails in woods its fun , never been into snow mobiles , where we live its very rural and our roads seem like an afterthought when it comes to plowing lol , usually last to get cleared , so we will hit the back roads to powerlknes and such , we have several people around here with side by siedes ,and the usually hit the powerlines , pack the trails and then we hit them good fun ....Anybody else ?
I thought I would make a quick "How-to" on setting wheel alignment since I was flipping my tie rod ends and I was going to have to re-align the wheels anyways.
Here's some of the tools you will need...
1.) Start with the ATV on a smooth and level surface, like a cement garage floor or driveway.
2.)Center up (Eyeball It) the handle bars and lock them into place with 2 ratchet straps, one on each side of handle bars. This of course prevents them from moving when your adjusting the tie-rods.
3.) Place two Jack Stands approximately 2 feet in front of the atv even with the outside edge of the two front wheels.
4.) Wrap a length of string all the way around the ATV and Jack Stands, Start and end at the rear hitch. Make sure the string is the same height from the ground on all 4 wheels. I like to attach a few elastic bands to both ends of the string before attaching the string to the hitch. This makes it easier to adjust the strings when moving the Jack Stands.
4.) Break lose the inner and outer tie-rod nuts. NOTE! Make sure you use 2 wrenches, one on the nut and one on the ball joint. Damage can occur by only using one wrench.
5.) Adjust the string by moving the Jack Stands in or out untill the string just touches both of the side surfaces of the rear tires on each side of the ATV. This will take some time to get it right but it needs to be done!
Check manufacturers wheel alignment specifications on your specific make and model before you adjust any components.
For this wheel alignment I'm using the Polaris Specs which seems to be a common setting.
Polaris - The recommended toe alignment is 1/8″ to 1/4″ toe out. This is a total amount, not per wheel.
6.) On the front rim, measure the distance from the string to the rim at the front and rear edges of the rim. The rear measurement should be 1/16″ - 1/8″ (.2 to .3 cm) more than the front measurement.
7.) If an adjustment is necessary, Turn the tie rod itself with a wrench or your hand in small increments. It doesn't take much to move the tire a long way, so go slow. Keep re-checking your measurement's until you have a 1/16″ - 1/8″ differance to the string.
6.) Once your satisfied that you have the correct "Toe Out" measurements you can tighten up the inner and outter tie-rod nuts on both sides. AGAIN...make sure to use 2 wrenches.
7.) Now take your ATV for a test drive to test your adjustments. If it still pulls one way or the other, just repeat the above steps to tweek the adjustments again utill your happy.
The whole process only takes about 15-20 min.
Hey just picked up another scrambler 850 was told the tps was bad. This atv has been beet to hell. Wiring has been tinkered with the crankcase has been replaced recently and the motor rebuilt (can see horizontal scores thru spark plug hole where it’s just been honed out and rebuilt)
my guess is it was ragged out till the motor blew a rod and rebuilt but the clown that did it couldn’t get it to run again and sold it. When I bought it it would pulse and smoke black at idle and die with throttle.
New tps installed and it won’t run period. I went to celebrate it and I’m getting 5 volts on 2 of the 3 wires running to the tps. Is this normal and if so how should I celebrate it?
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