Exhaust Question - Kawasaki KLR 650 Forum
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post #1 of 12 Old 07-08-2011, 08:48 PM Thread Starter
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Exhaust Question

Hey question for the guys running aftermarket exhausts. What kind are you running? Is it full exhaust with header? Or just muffler? After installing that what is needed to be changed on the motor? Like fueling time or something? My buddy has a kawi 250 and said when he installed the full aftermarket exhaust and air intake he also had to install a jet kit??? Sry I'm new to carbed motors.
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post #2 of 12 Old 07-08-2011, 09:34 PM
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I installed a full fmf system. Used the q4 muffler with the power bomb header. I have a k&n air filter and had to up the jetting to a 148 from the stock 145 jet. Also bumped up the idle jet to a 42 from a 40. The idle jet greatly helped me with cold starting. Am looking to ditch the k&n for a foam filter soon. Also while your in there do the .22 mod. Will really bring the bike to life.


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"Work to ride and ride to work."
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post #3 of 12 Old 07-09-2011, 01:06 AM Thread Starter
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Kool sounds great. Anymore input from someone else? How hard is it to change out these parts? I've worked on cars so I do have some mechanic skills.
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post #4 of 12 Old 07-09-2011, 03:59 PM
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euroemkay2,

I just purchased FMF Powercore 4 slip-on for my '09 along with FMF jetting kit. I run a stock air filter with snorkel removed and holes drilled in box..should have it mid next week and will let ya know how I like it... I always had good luck with FMF in the past (quads, mx)

birddog
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post #5 of 12 Old 07-09-2011, 06:30 PM Thread Starter
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Stock headers
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post #6 of 12 Old 07-09-2011, 07:51 PM
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You can spend big $$$ on mufflers, and headers for very little gain. I am not trying to tell you not to do it, or anything like that. But i would work out what sort of power i wanted from my bike, then work out which pipe header will give me that power. EG low down, mid range, or up high, its no good having big #s at 6500 if you change gears at 5500.A Big Gun will give you low down power.
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post #7 of 12 Old 07-09-2011, 09:18 PM Thread Starter
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I'M NOT doing it for power gain really. More for changing the sound.
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post #8 of 12 Old 07-10-2011, 12:18 AM
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Quote:
Originally Posted by euroemkay2 View Post
I'M NOT doing it for power gain really. More for changing the sound.

Low buck exhaust mod

No eye has seen, no ear has heard, no mind has conceived what God has prepared for those who love him. 1 Cor 2:9
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post #9 of 12 Old 07-10-2011, 11:21 PM
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I changed to a Vance and Hines XCR and rejetted with the Moose Stage 1 kit. Then I spent a weekend chasing bypass valve issues and fuel vacuum issues (kinked petcock hose and sticky gas cap vent valve). It's loud but still cheaper than replacing with another stock pipe. There is more top-end but less low-end torque and the gas mileage is slightly worse.
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post #10 of 12 Old 07-11-2011, 06:58 AM Thread Starter
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What can be done to have less low end torque
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