[scolba]

Hi guys, I have a few questions....first one is easy. How much HP does a stock 02 700 XC SP have??

Second one is.....how exaclty does VES work? I think I know how a two stroke works, effectivly useing the piston to allow air in and out....so how do the valves in this case work (similar to a 4 stroke??) and how does the variable part work???

Thanks a lot!!

 

[kevin]

If I remember right your HP numbers are 124-127, maybe even a bit higher. The VES works by effectively changing the size of the exhaust port. The exhaust port area is smaller at lower rpm's when the VES is closed (better for torque and economy) and gets larger as exhaust pressure overcomes the spring tension to open to VES "valve" or guillotine. This happens at higher rpms for maximum HP. The VES valve then basically takes out some of the compromises of a single size port at both low and high rpm's.

 

[C-notesnopro]

Kev, you could be a professor with that presentation,,,

 

[Racin3]

Nice lesson ! :div20: Only problem I've had with the exhaust valves is keeping them clean in certain conditions. Such as slow riding at say speeds less than 40 MPH for along peroid of time, I've had problems with the valves sticking or gumming up. Using dealer oil (VES oil) or Ipon oil Witch I think is even better helps the problem. Still I always pull the valves at least every 1000 miles just to make sure they stay clean.

 

[C-notesnopro]

Originally posted by Racin3@Sep 7 2005, 09:41 PM
Still I always pull the valves at least every 1000 miles just to make sure they stay clean.
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best advice anyone could give on this topic :div20: :beer:

 

[kevin]

Originally posted by C-NOTEPLUSf503@Sep 7 2005, 09:44 PM
best advice anyone could give on this topic :div20:  :beer:
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Yea I agree -- I got stung once with my 02 ZR600 when the valves started acting up on a 3 day trip. That really sucked.

 

[caddisfly]

I've got a dyno sheet somewhere that shows 132 horsepower for the 2002 XC 700. It put up similar numbers at the Shootout that year and killed the competition.

Prior to the addition of VES, I think 118 -120 was about the norm for the 700. From what I have seen, the 700s that came out after the 2002 were down on horsepower compared to the 2002.

The 2002 makes an amazing amount of horsepower, but with horsepower comes heat. My father-in-law's used to overheat whenever snow conditions weren't great, but Polaris cured the problem under warranty by adding an extra heat exchanger.

 

[polaris9500]

i beleve the dyno numbers on the 02 xc7 in amsnow shootout was like 133. and that was probably one of the best years in the shootout for them