I have a 01 mountain max 700, and while out riding the other day the machine was running just fine. I had stopped for a break for about 15 minutes and when I went to leave I started it up and took off and went about 50 ft and the thing started missing. I shut it off and started it up a number of times and a couple times I would make it 50 -100 yards before it was start acting up again. After doing this three or four times it finally kept running and I made it back. When I got back I let it sit for a while and tried to ride it, and again after about 150 yards it started missing again. The next morning I started it up, and it acted like it would run, I let it warm up for a couple minutes and went to take off and it immediately started to miss. It somewhat idles but it occasionaly wants to die, the lights flicker, the tack comes on and off, but when trying to give it gas it falls on its face. When I got it back home that day, I unloaded it and run it around the house for about a few minutes, was running fine and then all of sudden it started missing again. The sled has about 1700 miles on it. I checked the resistance on the stator and it was 1.2 ohms. The service manual says it should be around 0.4 ohms. Is this enough difference to conclude it is the stator or should I be checking something else? TORS seems to be working fine. If I understand correctly TORS would cut the engine out at 2500 to 3000 rpm and I can't even get there before it starts missing. Any advice would appreciated. I just don't want to buy an expensive stator if that is not the problem. Thanks.
Mountain Max Electrical Problem
- Thread starter Flatlander78
- Start date
MM miss
I had a 2000 MM700 with the same problem. On the right side of the air box is the cdi. The wires that plug in on the bottom did not have a good connection. I put a little dielectric grease in the plug and never had another problem. Also make sure none of the wires are cracked. Good luck.
I had a 2000 MM700 with the same problem. On the right side of the air box is the cdi. The wires that plug in on the bottom did not have a good connection. I put a little dielectric grease in the plug and never had another problem. Also make sure none of the wires are cracked. Good luck.
Dont bother testing resistance on a stator, you need to unplug the 3 white wires from the stator and test W-W NOT W TO GROUND on all 3 phases for the same peak AC voltage (hint, have a guy pull the rope while you look at the meter)
You should have about 50v AC on each one but dont be too concerned about how much, just make sure they are all the same
My guess is you have 1 bad phase on your stator
Or, Are both high and low beam on at the same time?
Do you have any electrical acc installed on the sled?
You should have about 50v AC on each one but dont be too concerned about how much, just make sure they are all the same
My guess is you have 1 bad phase on your stator
Or, Are both high and low beam on at the same time?
Do you have any electrical acc installed on the sled?
Can you give me a little more instruction on testing for voltage. What do you mean by W-W? I unplug the stator at the connection which has 3 white wires. How do I connect the meter from there to measure the voltage?
I don't have any electrical acc installed and I don't think both high and low beams are on at the same time but will check it out.
Check any and all wire connections under the hood as stated above. Doesn't sound like TORS but disconnect grease and reconnect all of those wires as well. Lets try to rule out the simple problem before you dig any deeper. Great suggestions above as well. Let us know what you figure out.
Does anyone know why testing the resistance of the stator isnt a good indicator of its health?
-Patrick
-Patrick
Flatlander I couldn't send a PM back to you, there's a glitch
Yes disco the 3 white wires and with your meter go white to white, AC volt's
Have a buddy pull the rope hard and look at your peak voltage, check all 3 phases this same way and make sure your buddy does the same pull every time
Doesn't really matter what number you see, should be 50v - 80v but what you are looking for is one that is way down from the other two
pggilchri, Resistance is a bad way to test a coil, I have seen a lot of cases where resistance is good but the coil wont make power, also different meter's can give you different number's, I find peak volt a much better indicator
If you dont have the right peak voltage it doesn't matter what the resistance is
Good luck
Yes disco the 3 white wires and with your meter go white to white, AC volt's
Have a buddy pull the rope hard and look at your peak voltage, check all 3 phases this same way and make sure your buddy does the same pull every time
Doesn't really matter what number you see, should be 50v - 80v but what you are looking for is one that is way down from the other two
pggilchri, Resistance is a bad way to test a coil, I have seen a lot of cases where resistance is good but the coil wont make power, also different meter's can give you different number's, I find peak volt a much better indicator
If you dont have the right peak voltage it doesn't matter what the resistance is
Good luck
Seems to be fine now!!
Well, wish I could tell you for sure what the problem was. I did find a wire that was bare right by the hood hinge. It looked like the harness melted on the pipe and melted through the blue wire. I repaired that. I also checked the connections on the cdi box. There were a few wires starting to rub through here also, but none looked like they were rubbed clean through. Put some liquid rubber on them just in case and put some dielectric grease on the connections. Did a half hearted test on the stator. By that I mean, I need to pull the spark plugs in order to get a good pull that will spin the engine over a little faster. I did get the same voltage on the three phases but it was only like 4 volts. I'm sure it was because the engine was turning over so slow.
Took it for a test ride and so far I haven't experienced any problems. Time will tell I guess whether the problem is fixed or not. If something comes up, i will update this post. Thanks to all for your help.
Well, wish I could tell you for sure what the problem was. I did find a wire that was bare right by the hood hinge. It looked like the harness melted on the pipe and melted through the blue wire. I repaired that. I also checked the connections on the cdi box. There were a few wires starting to rub through here also, but none looked like they were rubbed clean through. Put some liquid rubber on them just in case and put some dielectric grease on the connections. Did a half hearted test on the stator. By that I mean, I need to pull the spark plugs in order to get a good pull that will spin the engine over a little faster. I did get the same voltage on the three phases but it was only like 4 volts. I'm sure it was because the engine was turning over so slow.
Took it for a test ride and so far I haven't experienced any problems. Time will tell I guess whether the problem is fixed or not. If something comes up, i will update this post. Thanks to all for your help.