Blow Back Screen/'09 KLX250S
Yesterday I removed the blow back screen between the carb and air filter, might be a little lean but noticeably stronger from 4.5K through red line.
So far; Cam mod (removed ACR completely) rejetted with Keihin jets (N1TC needle jet, #128 main and #40 pilot), DG can, stock header, now the screen removal. Ain't no power wheelies, I'm a big guy, but for what it is, it pulls very strong and 50-70 mph and I'm getting 55-60 mpg. Great bike! I have 6 others all much bigger, but I really enjoy the KLX, reminds me why I started riding 45 years ago. Light on it's feet, zippy, comfortable. |
I really need to do this mod.. Don't I ?
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Originally Posted by Klxster
(Post 520883)
I really need to do this mod.. Don't I ?
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Removing the screen is not exactly a walk in the park getting the screws out of the inside of the airbox was a bit of a scream, I cut the actual screen out with a utility knife, and then used a small drum sander to smooth the edges of what was left.
I replaced the screws that held the screen in the air box with some screws that had hex heads which made it a lot easier to screw them back in when I was ready to reassemble. |
Well, since I'm the only one that rides it now days.. guess I'd better remove the screen and see what I get.. Current carb setup could use a little more airflow and is set for max increase off the screen removal.. I was afraid my son would wreck with some chick on back, catch fire, and I'd be sued for removing the screen... You know if it gives another HP up on top, that'd be close to 24hp and I'll be DONE !
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Originally Posted by Klxster
(Post 520887)
Well, since I'm the only one that rides it now days.. guess I'd better remove the screen and see what I get.. Current carb setup could use a little more airflow and is set for max increase off the screen removal.. I was afraid my son would wreck with some chick on back, catch fire, and I'd be sued for removing the screen... You know if it gives another HP up on top, that'd be close to 24hp and I'll be DONE !
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Yep, I agree..
So guess I'll fire up the cutting torch and warm up the saws-all.. Actually I think ARL said he pulled the rear suspension n swingarm to get the airbox out.. |
I did the job just taking the seat off and removing the air filter.
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Originally Posted by Byrdjo
(Post 520900)
I did the job just taking the seat off and removing the air filter.
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I removed the screen and had the same results as others. It felt a little off and needed a bump in the main jet. It does flow more air, but I did see a yout*be video of KTM on fire due to this mod. I run a K&N so I feel a little better as it has a built in screen, might be a false sense of security. I pulled the airbox out and disasembled, made things easy.
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