My 02 RMK 700 looses power @ 7000 RPM...?

D

doubledahlton

Free Member

Dec 8, 2008

43

1

8

Steamboat, CO

• Dec 8, 2008

• #1

I would appreciate any input...

I have an 02 RMK 700, it has an SLP pipe and can, V Force Reeds, team clutches... i think those are the only applicable mods. I was riding my sled this weekend and noticed as soon as the sled was at operating temp it would loose all power around 7000 rpm. It just breaks up and sounds horrible and looses power. I was thinking it might be dirty power valves or a broken reed. I also switched oil to the blue polaris oil..i used to run amsoil, and i added artic cat chain case oil... It would be great to get some input..

 

R

RockyMtn.Kris

Free Member

Dec 2, 2001

1,175

86

48

53

Spokane WA

• Dec 8, 2008

• #2

Check powervalves!

 

T

theultrarider

Well-known member

Nov 26, 2007

3,311

891

113

Soldotna Alaska

• Dec 8, 2008

• #3

Torn bellows on the power valves

 

D

doubledahlton

Free Member

Dec 8, 2008

43

1

8

Steamboat, CO

• Dec 9, 2008

• #4

im on it.. couple questions... what exactly do the bellows look like, and where should i be looking for tears..is it obvious?. are new gaskets necessary? Can this problem damage the motor?

 

Last edited: Dec 9, 2008

sled_guy

Well-known member

Premium Member

Jul 5, 2001

3,566

843

113

Riverton, Utah

• Dec 9, 2008

• #5

Pull the black caps off the power valves and the belows are the rubbery donuts in there. If there is a tear then the top side will be dirty with oil/grudge. If you are careful you don't have to pull the valve assemblies off the motor and therefor won't damage the gaskets.

BUT, if the sled has more than 1 season on it and the valves haven't been cleaned its well worth taking the time to do that.

sled_guy

 

S

sledhead Ed

Member

Lifetime Membership

Nov 27, 2007

86

9

8

63

Tyngsboro Mass.

• Dec 9, 2008

• #6

Also make sure vent lines are plugged into airbox. Or could be coolant temp sensor starting to fail intermidiately

 

D

doubledahlton

Free Member

Dec 8, 2008

43

1

8

Steamboat, CO

• Dec 10, 2008

• #7

So i got to the power valves tonight. One had a torn bellow and both had tons of carbon build up. I cleaned it up with carb cleaner a brillo pad and a wire brush. What i noticed was that one side of the valve looked smooth and the other looked pitted. Is this normal? And do you think it is a big deal to use a wire brush? Any suggestions on what to coat it w/ before reinstalling? Also are there any spring recommendations; i have orange.

Thanks for the input...

 

S

summersucks

Free Member

Dec 23, 2007

39

1

8

• Dec 10, 2008

• #8

ya sounds familiar a friend had bought a 800 rmk and went to service the valves and one was so carboned up it would not pull out...out come the vise grips and pry bars.....finaly but had to buy a new valve.

 

A

alexander18

Free Member

Dec 12, 2008

24

0

1

• Dec 12, 2008

• #9

a couple of my buddies ride polaris' with the liberty motors in them, they clean there power valves every 400 miles and say everytime they need it everything sounds normal with it, one of the causes for the cracks is the carbon build up the vacume tries to open the valve but it cant and the weakest part of the bellow cracks, i ran amsoil in my 97 583mxz and had to clean the power valves all the time, i switched back to skidoo oil and i dont have toclean them anymore

 

E

exman04

Free Member

Nov 28, 2007

606

84

28

Spokane WA

• Dec 12, 2008

• #10

When i had my 02 700, i had to clean my power valves all the time, about 2 to 400 miles. I switched to ams oil and went about 2000 miles and not one bit of build up. One of the best moves i made.

 

T

theUltamateTBM

Active member

Feb 20, 2008

545

40

28

• Dec 12, 2008

• #11

polaris ves motors should be run with a synthetic oil such as ves gold which has a detergent in it to help prevent carbon build up. wire brush is not a good idea o the older sleds pre 2004 or 2005 after that it is ok because they switched to a stainless valve when cleaning your power valves first put a little ves gold oil on them and see what I mean

 

T

Throttle Junkie

Free Member

Aug 21, 2001

1,062

25

48

48

Lewiston, ID....for now

• Dec 12, 2008

• #12

Don't waste your money on Polaris VES oil. My wife has a 02 700. carbon buildup is horrible with polaris blue and ves oil. I run either amsoil or Klotz and they are much better

 

S

Snowjunky

Well-known member

Jan 19, 2008

410

52

28

56

Loveland,Colorado

• Dec 13, 2008

• #13

Klotz here on 4 polaris motors. Valves look good every year when I clean them. Could probably go 2 years but what would I do in the summer then.

 

D

doubledahlton

Free Member

Dec 8, 2008

43

1

8

Steamboat, CO

• Dec 13, 2008

• #14

so i took my sled out today and she once again rips.. overall real easy fix and huge difference in performance...

 

B

BigRed118

Free Member

Dec 21, 2006

1,760

173

63

• Dec 15, 2008

• #15

glad to hear it. Wasn't there a bellow upgrade in 02?