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2003 Polaris Predator 90 motor trouble

13K views 7 replies 7 participants last post by  Kennyo 
#1 ·
I just bought my son a 2003 Polaris Predator 90. Ran fine when we bought it and that night went on a 5-6 miles trip threw the woods lots of power went up and down hills with no problem.

It seamed to smoke a little more then what I thought it should even for a 2-stroke. It also had a little sputter to it. But had great power.

The next day he road it for couple hours around the house no trouble. Then went to go up on the hill. it just started to die no power it would idle but when you pushed in the throttle it would just bog down and not go. Bought 2 new plugs put the fist one in and it took off ran fine for 5min then just went back to the same thing. Took that plug and noticed it was pretty wet. Put other plug in and it did the same thing wet after it came out. I have been reading some forums and found out about some problems Polaris has but not sure were to start if any one has any ides let me no ...Thanks
 
#3 ·
#4 ·
does it still have its oil injector in or was it removed?
 
#5 ·
I took the air filter out and found some water in the box and filter. Cleaned it out and the filter then I took the cover off the stator it was dry but was pretty dirty did not take the fly wheel off but used the air compressor to clean it out good. How do you check the stator to see if it is working right?

Started back up and seem to run good. Boy rode up the field lots of power then it would just die .He could start it back up and run pretty good back down. Tried adjusting the carb but not sure the proper setting? But it would surge up then down at most any turn in or out of and started loosing power. I think I will have to take the carb off and clean it out?

The plug that was in it was a NKG BPR6HS the book at the auto store called for a NKG BPR7HS. What is the best plug to use and what is the gap setting. the book they had was for ATVS’s and listed the 90 predator..

The bike still has the oil injector it is still all stock. How much smoke should be coming out.

Thanks
 
#6 ·
it really sounds like a fuel or carb issue. if you're having troubles going up hill, sputtering and losing power, check the float level on the carb or have it checked - that may be your entire issue. also make sure the carb is jetted properly and that the jets have not worked their way loose.
 
#7 ·
I had this same problem, It was dirt accumulated around the stator. UNfortunately blowing it out will not be enough. You will have to remove the fly-wheel and clean the area behind it well. I did this and my problems dissappeared. I also put silicone all around the case joint to keep out anymore dirt or water from entering the area. Good luck !!
 
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