2007 klx 250s

kannon
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2007 klx 250s

Unread post by kannon » Sat Oct 09, 2010 7:54 pm

i just bought a 250 klx. can anyone 1 tell me simple upgrades to make this machine have more pop

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HYPERR
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Re: 2007 klx 250s

Unread post by HYPERR » Sat Oct 09, 2010 8:04 pm

I have a 2006 KLX250S that I have had since new. These are the performance mods that I have made to the bike.

13 tooth front sprocket
125 main jet
40 pilot jet
Kouba fuel screw set at 2 turns out
N1TC needle w/ collar on 2nd notch
Slide drilled to 7/64"
Smog removed
KDX snorkel, now lid removed
FMF Powerbomb header
HMF Muffler
2008 Ducati Hypermotard 1100
2006 Kawasaki KLX250S
2004 Honda CBR600RR
2002 BMW R1150R
1996 Ducati 900SS

kannon
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need some advice on 07 klx 250s

Unread post by kannon » Sat Oct 09, 2010 8:06 pm

i just bought a klx 250 any advice on simple upgrades that will make a difference in power

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HYPERR
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Re: need some advice on 07 klx 250s

Unread post by HYPERR » Sat Oct 09, 2010 10:19 pm

351 big bore kit. :twisted:
2008 Ducati Hypermotard 1100
2006 Kawasaki KLX250S
2004 Honda CBR600RR
2002 BMW R1150R
1996 Ducati 900SS

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Hondagirl
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Re: need some advice on 07 klx 250s

Unread post by Hondagirl » Sat Oct 09, 2010 10:23 pm

:laughing:

Extreme makeover.
I think there were some alternative answers as well hanging round somewhere... :boat:

Nice bike 8) - high seat :)
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Traded: Honda SL230 and Yamaha XJR400

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HYPERR
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Re: need some advice on 07 klx 250s

Unread post by HYPERR » Sat Oct 09, 2010 10:30 pm

Seriously the 13 tooth front sprocket is a very cheap and easy mod and the difference is quite noticeable. You will need an impact gun to take the nut off though as it is a single big nut and not multiple small ones holding it.
2008 Ducati Hypermotard 1100
2006 Kawasaki KLX250S
2004 Honda CBR600RR
2002 BMW R1150R
1996 Ducati 900SS

kannon
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Re: 2007 klx 250s

Unread post by kannon » Sun Oct 10, 2010 9:02 am

about how much does everything you've done to the bike cost?

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Re: 2007 klx 250s

Unread post by HYPERR » Sun Oct 10, 2010 10:53 am

kannon wrote:about how much does everything you've done to the bike cost?
13 tooth front sprocket: $23
125 main jet: $7
40 pilot jet: $8
N1TC needle w/ collar on 2nd notch: $19
Kouba fuel screw set at 2 turns out: $25
Slide drilled to 7/64": $0
Smog removed: $0
KDX snorkel, now lid removed: $23 for the snorkel. $0 if you remove lid(not recommended if you ride through large puddles or streams)
FMF Powerbomb header: About $200 I think...
HMF Muffler: About $230 I think with the optional quiet core...

Assuming you do all the work yourself, the cost of the parts are very cheap other than the header and the muffler. If I was to do it over again, I would not do the header as I think it increased the peak HP at the expense of the low end torque. Also you lose the heat shield that comes on the stock header. The muffler was worth it as it really woke up the bike along with the carb mods and it sounds awesome! If budget is tight, then you can drill out the baffle on the stock muffler with a very long 1/2" drill bit. The cheap and the free mods are a must do. It will completely wake up the bike. Don't do the exhaust mods until you do the carb mods as stock the bike runs super lean as is and you will damage the motor.

FYI, I am at sea level and the way I have the bike set up, it starts instantaneously hot or cold, can be ridden away right away, idles perfectly, and revs from idle to redline with no hiccups or hesitation whatsoever. With all this modification, I still get about 60mpg. I'm actually surprised myself at how perfectly I dialed in the carburation. :laughing:

YMMV.
2008 Ducati Hypermotard 1100
2006 Kawasaki KLX250S
2004 Honda CBR600RR
2002 BMW R1150R
1996 Ducati 900SS

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Re: need some advice on 07 klx 250s

Unread post by HYPERR » Sun Oct 10, 2010 11:17 am

This bike is still completely stock?
2008 Ducati Hypermotard 1100
2006 Kawasaki KLX250S
2004 Honda CBR600RR
2002 BMW R1150R
1996 Ducati 900SS

kannon
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Re: need some advice on 07 klx 250s

Unread post by kannon » Sun Oct 10, 2010 1:22 pm

yes the bike is completely bone stock.

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HYPERR
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Re: need some advice on 07 klx 250s

Unread post by HYPERR » Sun Oct 10, 2010 3:45 pm

kannon wrote:yes the bike is completely bone stock.
That's very unusual considering the KLX250S is a very dirt orintated DP bike and most owners buy it to ride in the dirt and tend to mod them right away. So the bike is bone stock huh? Does the header have a purplish color to it?
2008 Ducati Hypermotard 1100
2006 Kawasaki KLX250S
2004 Honda CBR600RR
2002 BMW R1150R
1996 Ducati 900SS

Derrik70394
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Re: 2007 klx 250s

Unread post by Derrik70394 » Tue Jan 03, 2017 10:34 pm

I have same bike bone stock with 120 miles im 3rd owner. Does need more pep for sure.

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