I have a beyond yh 150 atv and will turn over sometimes, but sometimes it just clicks the solenoid, (with a good charged battery). It does make the battery post heat up and smoke like it getting too much juice. but does not seem to be firing. what could the possible causes be. what size battery should be used on this size motor as well..Thanks

 

Well, you've found the problem! Battery posts are not supposed to get hot, so you've got a bad connection at the 'hot' battery post.

Clean the connection up (replace the lug if necessary) and all will be well.

Think symmetry. You have two battery posts. All the current that comes out through one battery post *must* return back to the battery through the other. You must have a complete circuit for any current to flow at all.

Your two battery posts are the same size, shape, and have the same current flowing through them. Therefore if one gets hot the other must be getting hot too. But you have only one post getting hot. Viola, it is not the same as the other. Once you make it the same it will be fixed .

 

Any 12 volt battery above 5 amp-hour capacity that will fit in the battery compartment will work. I'd go to walmart and buy the cheapest.

But before you do that make sure your charging system is working. Otherwise you battery will go dead over a couple weeks, get quickly ruined sitting around less than fully charged, and you will have just wasted your money.

Fix the bad connection first, then start the engine and run at a medium fast clip. Measure the DC voltage right on the battery terminals with the headlights off. You should have 13.5 to 14.5 volts DC.

 

what if the connections are fine....should i trace the wires for a bad spot? would the regulator be bad? it seems to only start frying itself when i hit the starter. would this cause the motor to not fire. maybe the solenoid? thanks for your reply..

 

The connections are *not* fine if they are getting hot and smoking. The power going up in heat through a bad connection is proportional to the square of the current. So things that draw a lot of current (like the starter motor) will be the ones that make the problem show up.

In addition. a bad connection drops voltage and reduces the power available to the starter motor. Often is reduces it to the point that the starter can't turn the engine. The solenoid clicks, but that is all.

Get your starter motor turning first. Then work on the "no fire" problem.

And exactly what do you mean by "no fire"? Does this mean you have no spark, or does this mean the engine doesn't start for unknown reasons? Have you checked for spark?

 

ok,, i will take the plastic off and look at the harness for any bad signs. the connection points are clean so i would only assume that there is a bad spot or somebody before me put something back wrong. I bought this thing cheap and i am no specialist at atvs but ive been reading alot of the post and this site is very informative. thanks for your time

 

ok... looked the wires over and everything is without frays or nicks and connected ok. i got a new battery and charged it so i know its a good battery. the starter drags real bad so it wont start. the thing wont turn over so i cant really tell if im getting spark to the plug. what to do next. thanks

 

One of my Chinese quads was smoking the ground wire while pushing the starter... turned out that ALL of the wires that needed a ground were going thru 1 small wire...

 

Take a meter and measure the battery voltage right on the battery terminals while cranking the starter. Set your meter to measure DC voltage on the 20 volt scale. It should stay above 12 volts. What do you measure?

Next measure the voltage right at the starter input screw post to the starter motor case. Again do this while cranking the starter. It should be above 11 volts. What do you measure?

 

i agree with Lynn, you really need a meter to gauge/test the circuitry. wires may look alright, but internally(inside the jacket) they can be stressed and frayed/stretched and you would never know it. a meter will be your best friend.........