Elevation Changes - Kawasaki KLR 650 Forum
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post #1 of 9 Old 07-06-2017, 03:33 PM Thread Starter
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Elevation Changes

I am in Ontario Canada and may be taking a trip to the American Southwest later this summer. I am planning on going into places with lots of elevation changes like Colorado, Utah, Arizona etc. Do I have to make any adjustments to my carb at all for this type of riding?
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post #2 of 9 Old 07-06-2017, 06:02 PM
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Originally Posted by Sonic View Post
I am in Ontario Canada and may be taking a trip to the American Southwest later this summer. I am planning on going into places with lots of elevation changes like Colorado, Utah, Arizona etc. Do I have to make any adjustments to my carb at all for this type of riding?
Sonic, I'll suggest probably not.

If your KLR is factory stock and standard it will actually operate a little better at 3000-6000 foot altitude. Because it is almost too lean at 0-2000 feet in the low to mid throttle area.
And a stock and standard KLR650 will operate adequately up to 13,000+ feet.
Every normally aspirated internal combustion engine looses power with altitude. But who are you gonna' drag race at 6000-13,000 feet? And how long are you staying?

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post #3 of 9 Old 07-06-2017, 07:17 PM Thread Starter
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Originally Posted by pdwestman View Post
Sonic, I'll suggest probably not.

If your KLR is factory stock and standard it will actually operate a little better at 3000-6000 foot altitude. Because it is almost too lean at 0-2000 feet in the low to mid throttle area.
And a stock and standard KLR650 will operate adequately up to 13,000+ feet.
Every normally aspirated internal combustion engine looses power with altitude. But who are you gonna' drag race at 6000-13,000 feet? And how long are you staying?
Thank you for the very complete reply. Yes my KLR is a new 2017 I just bought a couple of weeks ago so it will be bone stock. I am planning on a three week trip. Five or six days to get there each way and a week or so riding in the mountains. Probably mid Aug departure but don't have confirmed dates yet.
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post #4 of 9 Old 07-06-2017, 07:42 PM
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Agree with pdwestman; carburetor adjustments for altitude likely unnecessary; however . . . all naturally-aspirated engines, even with optimum air/fuel ratios, will lose power at higher elevation, fact-of-life.
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post #5 of 9 Old 07-07-2017, 08:36 AM
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I'll chip in too, since I had the bike up at 12,698 feet this weekend...

I'll second the observation that there's no need to mess with anything for the elevation, although as previously mentioned, you'll notice a slight power loss with the altitude.

If you're coming down to the South West, and plan on taking any back roads, I'd recommend bringing an extra pre-oiled air filter with you on your trip - it's usually so dusty that your air filter can get clogged pretty fast, and that will really reduce your power. (I spent the weekend up on the passes, and I was shocked at how dirty my air filter got over the course of only five days on those dusty roads).

Have a good trip and drop a line when you pass through Denver!
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post #6 of 9 Old 07-07-2017, 09:48 AM
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Like they said, you're fine. The CV carb on the KLR is largely self adjusting for altitude.

Dave
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post #7 of 9 Old 07-07-2017, 08:10 PM Thread Starter
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Thanx everyone for the very good info.
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post #8 of 9 Old 07-15-2017, 03:14 PM
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Quote:
Originally Posted by KLR Kool-Aid! View Post
I'll chip in too, since I had the bike up at 12,698 feet this weekend...

I'll second the observation that there's no need to mess with anything for the elevation, although as previously mentioned, you'll notice a slight power loss with the altitude.

If you're coming down to the South West, and plan on taking any back roads, I'd recommend bringing an extra pre-oiled air filter with you on your trip - it's usually so dusty that your air filter can get clogged pretty fast, and that will really reduce your power. (I spent the weekend up on the passes, and I was shocked at how dirty my air filter got over the course of only five days on those dusty roads).

Have a good trip and drop a line when you pass through Denver!
After riding a few miles on very dusty roads, I found my air filter partially covered with about 1/4 inch of oily dust. The rear wheel actually "pumps" dust into the stock inlet. I drilled 4 1 inch holes in the top of the filter box and covered the stock inlet. No more dust caking on the filter.

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post #9 of 9 Old 07-16-2017, 08:12 AM
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The very fine particulate dust that is prevalent in some of the Western states can wreak havoc on your filter. To echo Kool Aid, it's good planning to bring a spere filter on your trip.
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