250 bogging under throttle - Kawasaki KLR 650 Forum
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post #1 of 3 Old 09-20-2016, 08:55 PM Thread Starter
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Question 250 bogging under throttle

I recently got myself a 1991 KLR250, the only issue I can't seem to resolve is that it's bogging under throttle.
A friend of mine suggested getting a carb kit, but all I've been able to find are jet kits.
Would getting a carb kit be the right course of action, would a jet kit be sufficient or would it be something else entirely?
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post #2 of 3 Old 09-20-2016, 09:44 PM
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Forget about jet kits. VERY LITTLE (if any) improvement in performance for the CVK34 from such modification, IMHO.

Rather . . . disassemble, clean, inspect, and adjust the stock carb. Take a close look at your diaphragm fabric condition and sealing upon reassembly; an air leak here can cause "bogging."

A properly adjusted and cleaned stock carb won't "bog," nor will a jet kit cure the condition if it does.

My opinion only; opposing views welcomed!

FULL DISCLOSURE: 2003 KLR650, all stock, runs like the wind!

-------------------------

Seeking clarification, not entirely sure of the meaning of the expression, "bogging under throttle." The little 250 is, a little 250. It must rev high to process the fuel necessary to produce meaningful power. Three grand's about a minimum riding speed, seems to me, and the thing doesn't REALLY come alive 'til 6000.

I got mixed up in a pack of BMWs on a loop at a rally in West Virginia; I was shifting at 9,000 rpm to keep those guys in sight!

Last edited by Damocles; 09-20-2016 at 09:48 PM.
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post #3 of 3 Old 09-21-2016, 10:05 AM
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Join Date: Nov 2009
Location: Lander, Wyoming
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Quote:
Originally Posted by TIMM4W View Post
I recently got myself a 1991 KLR250, the only issue I can't seem to resolve is that it's bogging under throttle.
A friend of mine suggested getting a carb kit, but all I've been able to find are jet kits.
Would getting a carb kit be the right course of action, would a jet kit be sufficient or would it be something else entirely?
Sorry TIMM4W,
You have not supplied enough information about local altitude or service history of your bike.

Do you live at 500 ft or 5500 ft? Have you recently adjusted the valve tappets or not? If so, did you adjust to the proper wide end of specs or make the mistake of adjusting on the tight/quiet side?? Tight valve tappet clearances Cause many carburation issues!

Is the Air Filter properly clean and OILED? Has the air filter always been proper maintained? Has the air silencer snorkel been removed from the dirty side of the air box to allow the little engine to "breath easier?
What is your current main jet size?

pdwestman
Modify at "YOUR OWN RISK"!

Still riding my 1987 KL650-A1. 84,000+ miles & counting
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