: Exhaust Valve Springs
03-12-2004, 08:13 PM
i was just looking through my service manual and noticed that the exhaust valve springs for my 02 edge 500 are the same as the edge 800's. Just wondering if anyone knows why they did this and if anyone has change to a lower rated spring and noticed an improvement. Mine has the highest lbs per inch rating but the 600 and 700 have pretty much half the rating.
any help understanding this would be appreciated
03-22-2004, 08:18 PM
03-23-2004, 09:08 AM
i think you may have confused the colors. your 500 spring should be quite light.
03-23-2004, 01:44 PM
Ya i thought the same thing but in the manual it says for an 02 XCSP 500 the spring is a purple/white which is 9 lbs @1.0 In and 11 lbs @ .630 In. So i thought it was a mistake so i checked the machine and that is what is in there. The same spring as the 800 XCSP.
This is what i dont understand.
03-23-2004, 02:03 PM
honestly if you want more throttle responce i would look elsewhere. well, what are you trying to do with it?
03-23-2004, 06:16 PM
I am just trying to get the sled from loading up. I tried jetting and it made a difference but was just thinking a lighter spring might help a little more. I dont think it is running to rich because the plugs are perfect and performace is great everywhere except when you are riding hard and come to a stop and try to gun it again, it smokes like hell and have to feather the throttle to get it going
As you can tell i dont have to much experience with the new liberty's and thought it might help to change to a softer spring but it is just a GUESS.
Thanks for the help tifa
03-23-2004, 06:18 PM
how long has it been sice the valves were cleaned?
03-23-2004, 06:30 PM
I cleaned them after the first 300 miles and checked every 500 after that. They have always been spotless since i started using amsoil interceptor. It is really starting to bug me but this is my first year working on the liberty and dont know them to good YET. I guess i will figure it out one day.
Any clue at all ???
03-23-2004, 06:46 PM
are your needles in the stock pos?
03-23-2004, 07:21 PM
Yes they are. Do you think moving the clip up one might help?
03-23-2004, 07:39 PM
Hey tifa, I noticed that you have a 01 500. I was just wondering if you had notice with yours that there is a flat spot at the beginning of the midrange and topend.
To answer your question about what am i trying to do, i was think about trying to get a little more acceleration in the bottom and midrange. I dont really care about topend and i dont really wont to go crazy with mods. I am pretty happy overall with my sled just trying to tune it to my riding style.
I really appreciate the help though
03-23-2004, 11:08 PM
What I've found that works is going up one size in the pilot jet and adjust the fuel screws accordingly.There will be no more hesitation and clean and crisp all the way to the top.
03-24-2004, 01:45 AM
The exhaust valve springs are that stiff because of the high exhaust ports required to make that much power on a 500. Polaris wants to keep the valve at alow position until 6800 to 7000 rpm in order for the small displacement engine to make torque at low rpm. If you want to try something that is dramatic, remove the springs from the valves and go for a rip......you will be disgusted as will your fuel economy....jason
03-24-2004, 07:31 AM
the only reason i thought about the spring change is because i notice they changed them in 03 and 04 to a pink/yellow but have not had a chance to go to the dealer and see if this is a softer or heavier spring
03-24-2004, 09:04 AM
where are your fuel screws set? i wouldnt mess with the pilot. odds are your rich not lean. my 500 has no EV. and it also wont do 110mph. lol
03-24-2004, 03:40 PM
Whats going on with your machine. I read somewhere that all the 500's, 97 and up will do at least 110 mph. Mines red so that must give it at least 10 more horsepower.
The fuel screws are on the factory setting still. 1.5 turns i believe.
03-24-2004, 04:52 PM
heres what you can do. go 1/2 turn richer with the fuel screws. see what it does. if worse, go the other way but i wouldnt go under 3/4 of a turn or over 3 1/2 from lightly seated. you could mess with the needles also start by going 1 clip richer (1 clip lower on the needle) if worse go the other way. mike
03-24-2004, 06:25 PM
I'll give that a try
03-26-2004, 04:27 PM
im pretty sure your sled has a tps also. make sure thats set right FIRST. go to hardcoresledder.com for procedure. mike