Living at 5280 ft now. What jet? - Kawasaki KLR 650 Forum
1987 to 2007 Wrenching & Mods For maintaining, repair or modifications of Generation 1 KLR's. 2007 and earlier.

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post #1 of 5 Old 04-01-2017, 01:42 PM Thread Starter
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Living at 5280 ft now. What jet?

Recently went through a job change and moved to the Denver area. 142 main with my dynojet needle now. Do I need to go leaner?


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2003 KLR 650
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post #2 of 5 Old 04-01-2017, 02:37 PM
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Nope! Ride it, from sea-level to 13,000 ft.
Welcome to the 'Rocky Mountains'. Do you have a metal skid plate?
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post #3 of 5 Old 04-01-2017, 02:45 PM
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Quote:
Originally Posted by JasonK94Z View Post
Recently went through a job change and moved to the Denver area. 142 main with my dynojet needle now. Do I need to go leaner?


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Only if your bike was richer than it should have been while in Oklahoma.

DPelletier may inquire as to whether the main jet is Dyno Jet brand or OEM Keihin, and then make his suggestion.

pdwestman
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post #4 of 5 Old 04-01-2017, 04:07 PM
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Quote:
Originally Posted by pdwestman View Post
Nope! Ride it, from sea-level to 13,000 ft.
Welcome to the 'Rocky Mountains'. Do you have a metal skid plate?
The reason that pdwestman can say this is because the tapered needle in the needle jet that controls fuel flow into the carburetor throat is not connected to the throttle plate. It is controlled by the air pressure on a diaphragm on the carburetor slide. It is called a constant velocity carburetor. The KCV logo on the side of the carb stands for Keihin Constant Velocity.

At higher elevations the thinner air causes the needle to rise less at the same engine speed compared to lower elevations and provides reduced fuel flow for the reduced air mass flow. You will have less power at higher elevations due to the thinner air, but you will have the proper fuel air mixture as you ride form below sea level at Death Valley to the highest mountain tops in Colorado.

Here is a better description: www.omnilex.com/public/bmw78/cvcarb.pdf
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post #5 of 5 Old 04-01-2017, 04:26 PM Thread Starter
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Thanks everyone. I'm all set then. Pdwestman already replied to a similar post of mine awhile back before I moved here. It was about my dynojet kit having me jetted too rich. I've since corrected that issue.


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