Is there anyway to adjust the fuel gauge? - Page 3 - HCS Snowmobile Forums

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Old 01-21-2020, 05:24 AM   #21 (permalink)
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His 600 doesn't have the VES. We'll have to check the track tension. If it was the carbs wouldn't it run rough? It runs really good.
Always forgets that there was a nonves 600 in 01..

the nonves bigblocks are not known as fuel misers. Some years worse than others. Which carbs are on this sled - Keihins or mikunis?

fwiw, when I got my 99 xc700 it struggled to get 7 mpg. After some tweaks to clutching / carbs etc. it got around 8.5. Still not good but a nice improvement.
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Old 01-21-2020, 09:24 AM   #22 (permalink)
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If the needle & seat was leaking, wouldn't that cause it to run not just rich, but rough as well?

Are you talking about the large main springs in both clutches?

Thanks, NYH1.
If the sled as the mikuni carbs, when those o rings begin leaking it can be just enough to notice bad fuel mileage. Sled can still run fine.
There's only one spring in each clutch. Smaller o.d. for the primary. Larger o.d. for the driven.
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Old 01-21-2020, 09:28 AM   #23 (permalink)
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Always forgets that there was a nonves 600 in 01..

the nonves bigblocks are not known as fuel misers. Some years worse than others. Which carbs are on this sled - Keihins or mikunis?

fwiw, when I got my 99 xc700 it struggled to get 7 mpg. After some tweaks to clutching / carbs etc. it got around 8.5. Still not good but a nice improvement.
My 98-99 xc 600's never got better than 10 mpg ever in quebec. They were on the thirsty side. Big difference with the 00 600 ves. I use to get 125 miles to a tank before needing to look for fuel.
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Old 01-21-2020, 09:44 AM   #24 (permalink)
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My bad. If it is a non-VES 600 then yes, you may struggle to get much better mpg. Still check the clutches for proper operation and track tension.
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Old 01-21-2020, 11:30 PM   #25 (permalink)
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Quote:
Originally Posted by ivar View Post
Always forgets that there was a nonves 600 in 01..

the nonves bigblocks are not known as fuel misers. Some years worse than others. Which carbs are on this sled - Keihins or mikunis?

fwiw, when I got my 99 xc700 it struggled to get 7 mpg. After some tweaks to clutching / carbs etc. it got around 8.5. Still not good but a nice improvement.
I'm not sure which cards are on it, I'd have to look.

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Old 01-21-2020, 11:50 PM   #26 (permalink)
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I think it's a carburetor issue. We rode about 90 miles today, just got back. When I was following him I noticed I could both smell fuel and see darker colored exhaust coming from it. Not terrible, but definitely noticeable.

Then I rode it for a while. If you take off fast it runs fine. If you're cruising at say 40 MPH and nail the throttle it has a midrange bog that go's away as you gain speed. Again, not terrible, but definitely noticeable.

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