I see you posted long ago, but I also have a KLX250sf that I purchased that already had a hmf pipe installed. However, I don’t think they jetted it correctly it’s upjetted to a 120…. But I had to tape off half the intake box to get it to run correctly. You wouldn’t know what the jetting was for the klx250
with the HMF do you?

QUOTE=DJFields;66619]Hello All: The one component of the KLX250s I always disliked was the muffler, both sound and looks. Yes I did the original drilling of the baffle and then modified with a larger outlet. Still not satisfied, I recently installed the HMF Slip-On exhaust. This is a high quality component from a very good manufacturer. the only draw back was the wait time to get the pipe. As they "build to order" it took about 4 weeks, but they made it up in the price and shipping. All said and done it came to 239 w/quiet insert, shipping and a tee shirt. I have all the other modifications complete and jetted to the same specs as HMF tested to as well. I struglled with the full systems as I did not want to replace the head pipe As I feel it is sized correctly. ( this goes back to a paper I wrote in school around the effects of heaeder I.D. and length realtive to HP/TQ - If you make the header to large you will loose some TQ in the lower RPM band )
Installation and fit is perfect! Plus HMF is the only one to post actual dyno results.
That all being said, I'm really satisfied with the pipes performance, sound, and looks.
( This post is intended to share information and hopefully not start another big arguement and what is better, Muzzy or Big Gun.)
See Pictures below.
Thanks
Don



[img]local://upfiles/1026/886E061392AC47A3A891A18A5488A9E4.jpg[/img][/QUOTE]