WHAT CAUSES THIS? Polaris 500

michaeladams

New member
i was told that the only time i should run a br9es is if that is all i have and just to nearest place to get the right kind.must be somthing to that.
 

bouncer

Member
My son was riding it and he tends to ride at a steady pace. I just cleaned the carbs, pulled jets, used carb cleaner, always look at the jets at the light. Were all clean. Will be checking carbs, maybe go up a size in pilot jets. Heard that with todays fuel, ethonal and additives, its wise to go to a bigger jet. Always burned premium, mostly BP as I like BP as their premium is clear. Some premiums are a yellow color due to additives, but BP always seem clear. I also posted my Poo 600 1999 touring that also melted down this year, son was also riding that. Its still apart in the garage, guess I'll get that back together this week too, as I am on vacation till March 7th. Thanks for all the feedback.
Big Bill

Bill, I would increase the size of the Pilot and Main jets by one size on both sleds.

You can't trust the gas now a days and every year more and more older carburetor equipped sleds are melting pistons.

The worst that can happen with too much gas is bad mileage, fouling plugs, or both.
 
i was told that the only time i should run a br9es is if that is all i have and just to nearest place to get the right kind.must be somthing to that.

The only diference between the BPR and BR is the construction. P=projected insulator type and R=resistor type. B is just the thread size.
 

dschultz

New member
"Pilot jet is for idle only."

The pilot jet is being used from idle to 1/3 throtle and when cruising around at about 4,000to 5,000 rpm and around 20 to 30 mph you are using the pilot jet.

Thats what I was taught, but I know that he had a very lean condition which could be a number of different issues
 

indy_500

Well-known member
Just thought i'd let you guys know I cruised at 50 mph for 75 miles straight with maybe 5 stops and didn't blow my sled up at all. that's about 5500 rpms. Got very boring on the mountain bay.
 
Just thought i'd let you guys know I cruised at 50 mph for 75 miles straight with maybe 5 stops and didn't blow my sled up at all. that's about 5500 rpms. Got very boring on the mountain bay.

Indy- I'm not buying the "hold it at the same speed too long blow up" either.
 

hotwire

Member
I use stranded copper wire #12 THHN to help clean out the jets. Spray in carb cleaner, then run a couple of strands of wire through the jet to loosen and pull out any deposits. And then of course always use Seafoam.
 

big_bill

New member
Just got all the parts for both sleds and the 500 is just about done putting back together. Would have finished it tonight but had a couple bad expansion plus on the air box, I call them butt plugs, they are what the screws that hold the fuel pump, cdi, and air box screw into. I did go up a size on both the pilot and main jet, also going to do that on the 99 600. Thanks for all the feedback, will post and let everyone know how the sleds turn out.
Big Bill
 
Just got all the parts for both sleds and the 500 is just about done putting back together. Would have finished it tonight but had a couple bad expansion plus on the air box, I call them butt plugs, they are what the screws that hold the fuel pump, cdi, and air box screw into. I did go up a size on both the pilot and main jet, also going to do that on the 99 600. Thanks for all the feedback, will post and let everyone know how the sleds turn out.
Big Bill

Sooooo...what was the cause?????
 

motor_slut

New member
I did go up a size on both the pilot and main jet, also going to do that on the 99 600. Thanks for all the feedback, will post and let everyone know how the sleds turn out.
Big Bill

I bet it runs like crap. You should never have to change the pilot jet on a stock motor. All lean and rich conditions should be fixed with the screws on the carbs. Mains are to be adjusted for temp and altitude.
 
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