Increase mpg?!? - 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 4 Old 06-02-2007, 03:46 PM Thread Starter
Join Date: Jun 2007
Posts: 1
Post Increase mpg?!?

Just wondering if jetting/air-filter/exhaust will have an adverse effect on my economy? I get about 45 mpg and my '89 muffler is starting to rust... just wondering if I should swap for stock or do the exhaust/jet stuff! Thanks!
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post #2 of 4 Old 06-06-2007, 09:38 AM
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Join Date: Sep 2006
Location: Franklinville, NC
Posts: 650
Leave the Exhaust and jetting alone..(save for the pilot jet adjustment)
Mileage will go down, bike will run hotter, you'll be pulling the sparkplug to check for lean conditions, you'll always be wanting to squeeking a lil more "HP" out of it...It's not there.

Well, ok. On a dyno it show it there, But I think it's a placebo affect of hearing the loud pipe.

Put a stock can back on and forget about it.

If you want a hp. gain. get the 685 piston kit, or wait till the 705 kit comes out. ... then you'll have something.

my opinion..

- Joe

HighSpeed Hiker- DV o5'
Originally Posted by larryboy
come awn... it's not'll be fun..

sorry I can't....... I'm fishing today
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post #3 of 4 Old 06-07-2007, 02:54 PM
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Join Date: Sep 2006
Location: Iderho...
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When I put the Supertrapp Quiet series on my bike, I lost about 3 MPG. I did adjust the fuel mixture per Eagle Mike.

I gained alot in the kick-ass thumper sounds though...

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post #4 of 4 Old 06-28-2007, 09:48 AM
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Join Date: May 2007
Location: Eustis, FL
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Originally Posted by firefighter_joe View Post
When I put the Supertrapp Quiet series on my bike, I lost about 3 MPG. I did adjust the fuel mixture per Eagle Mike.

I gained alot in the kick-ass thumper sounds though...

I put a Super-Trapp Racing Series pipe on mine many many moons ago, with 4 discs in it. It is quite loud, which I've grown to like because I get a better feel for my engine as I can hear exactly where it is for shifting and pushing it hard. Also, I have found it helpful when riding with my buddy in the woods. When he goes off to check a trail and I wait for him, I have no idea where he is. Now when I go check a trail he knows exactly where I am because he can hear me, of course you don't need a pipe this loud to hear someone in the woods. That being said, I definitely have more power than I use to. I also have a "Snuffer" cap on it that will quiet it down a little just by turning the cap, when I close the Snuffer, it does take away some of the power that I had.
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