Gmiller

Hey

I have a 1998 Polaris 700 RMK with a 151x2 track, 700 Liberty twin with twin SLP Pipes, I live in Breckenridge Colorado which is above 9000feet. Im having troubles with my sled backfiring , Does anyone know if its just the tuning(fuel to oil ratio) or my plugs. Also if anyone else is running 9000 to 13000 feet what is your needle set at? I have the KEIHIN PWK Carbs


Anyone have the power packs and or boost bottle and are they worth the money?

Thanks

SledX700

Did you fix your backfire? I had a similiar problem with my 05 700 RMK. I found out the prblem was that I had my sled to lean. I backed off 2 jet sizes and it fixed the problem. Also, Im running my needle in the #2 postion.

Gmiller

I kinda have, but the sled is still running like crap, what elevation are you at? Also what size jets did you go too? Thanks for the reply, i appricate it!

Grant Miller

Gmiller

Your sled looks awesome by the way! You should come up and we'll ride vail pass!

Skligmund

Check you choke plungers. Make sure they are not sticking. I had that issue this weekend with mine, did the same thing. Had my left choke cable bend radius too tight just before it went into the carb there, where is zipties to the airbox.

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1997 Polaris Indy 700 RMK - Twin SLP pipes, EGT gauges -- "Fukengruven"
1997 Polaris Indy Trail RMK 488 - Stock -- "Yard Sale"

Polaris 580/597/600 crank info: http://www.geocities.com/schmidt92/polaris_faq.html

Gmiller

Im thinking its more my elevation, Im in the Rocky Mtns up around 9500feet most the time, then when i really go out im up 12000 13000feet at most. i can't really find a valid jetting chart and from what i have found my main is what they recommend for the elevation 9000-12000 feet, in other words i should be able to dial the tuning in better than it is. Do i have to change the slow jet, or the needle size, im not sure!

But thanks
Grant Miller

SledX700

When you pull your spark plugs, what color are the tips?

SledX700

I ride between 9000 and 11500. Im running my sled pretty lean. I have 340s in but I always have to watch my gauges.

Gmiller

They are a dark brown, sometimes wet, sometimes dry, im always playing with my air-adjust screws!

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2005 Polaris 900 RMK 166 track, SLP can, Holtz Spindles and front A-arms. Inside Axle kit and 9in wheels, Compfusion motor mounts. All Factory Updates______

1998 Polaris 700 RMK, Twin SLP pipes and lightweight can, Exhaust temp guage, 151x2 track, fox shocks around and a big wheel kit.

Gmiller

The thing is, when i ride a little lower in altitude, maybe 500 feet lower it seems to run awesome, up those 500 feet it'll backfire untill warmer, then run ok but a little worse than if i were lower. Im at the second needle position from the bottom, not sure if jets are stock or if they were changed. Maybe im a bit lean but ill have to change jets to correct it now i think!

Thanks
Grant Miller

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2005 Polaris 900 RMK 166 track, SLP can, Holtz Spindles and front A-arms. Inside Axle kit and 9in wheels, Compfusion motor mounts. All Factory Updates______

1998 Polaris 700 RMK, Twin SLP pipes and lightweight can, Exhaust temp guage, 151x2 track, fox shocks around and a big wheel kit.