Need Help! 03 sks 700 struggles to rev over 7000 rpm's

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o3polarissks

New member

Nov 28, 2007

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• Dec 1, 2007

• #1

Any 1 have any ideas?? Power valves are clean, new spark plugs an belt..Im running 56g weights an it also did the same with stock 62g weights..Once it hits 7000rpms it just seems to bog its way to 8000rpms if it makes it that far..

 

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XC700116

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Oct 2, 2007

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Milliken, CO

• Dec 1, 2007

• #2

maybe look into the other thread (in this section)on this same problem in an 800

 

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predator509

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Nov 26, 2007

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Fort McMurray, Alberta

• Dec 2, 2007

• #3

check the rubber diaphrams for the exhaust valves. the old ones were prone to cracking right around where the exhaust valve itself screws on. the newest daiphrams are orange I believe and I would almost guarantee this is your problem.

 

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Gen2

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Dec 1, 2007

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• Dec 2, 2007

• #4

Make sure the pressure feed hole in the cyl. is open also. Just because the valves and diaphrams look good doesn't mean that cyl. pressure is getting to them. That hole is very small and way down in there. often over looked. Shine a light through the spark plug hole while looking into the small round hole above the VES slot. You should see light in it.
Sounds real rich or valves are not opening. Try taking the ves springs out and see if it changes,

 

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spc3848

Free Member

Dec 2, 2007

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8

Estevan, SK

• Dec 2, 2007

• #5

I agree with predator, happen to mine in cooke last year. Sled sounded different and then notice oil coming out of the ves cover hole.

 

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Xc Special

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Jul 13, 2001

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64

manitoba canada

• Dec 2, 2007

• #6

i agree torn bellow, or stuck valve,,only takes one to do it

 

MARV1

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Kotlik, AK

• Dec 2, 2007

• #7

Change out the clutch springs, check reeds also.

 

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OHIO RIDER

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Nov 26, 2007

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47

jackson, wy

• Dec 2, 2007

• #8

i had same problem with my 02 800 poo last yr. slp recommended different power valve springs and adjustible mtn helix..... solved problem.

 

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900polman

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Ft Bridger WY

• Dec 3, 2007

• #9

tach problems

my 900 did the same thing. primary clutch spring was broke but couldnt see it.