I recently purchased this kit from
http://bestdualsportbikes.com/dual-sport-bikes/2013-honda-crf250l/.
I chose the FMF Q-4 Exhaust and Megabomb Header. The kit also comes with a FMF Fuel Programmer and 13 tooth front sprocket. The fuel box is already programmed from the factory to match this pipe setup, but you can tweak it if necessary.
The Exhaust system fit perfectly and the fuel box plugged in easily as well....the engine fired right up and ran perfectly. With the stock sprocket
it was like a different Bike! Lots more acceleration, especially in the higher RPM range. Top end is improved as well.
After installing the 13 tooth sprocket,
THE FUN BEGAN! It races through the gears and accelerates strongly. You have passing power in 6th gear and top end is higher. With the 13, the speedo as way off. With my heavy ass and wide body it showed 145+ KPH, but the GPS showed 123+KPH. It does 80 MPH easily and that is good enough for me...I appreciate the improved acceleration. Others say it will go lots faster. Guess it depends on one”s weight, altitude, fuel and other factors. I think with some more air box mods it will do better.
The higher revs with the 13 tooth works very well with the FMF design and fuel programmer and provides the most dramatic results.
I think the 13 tooth is perfect for off road and mountain riding that I do here in Thailand. Some may prefer the 14 for long road trips.
I drilled holes in the air box cover and took off the metal filter screen as directed..it did make a positive difference. I have not cut out the top of the air box yet. I also have not removed the pare valve. The engine seems to run the same with the 0-2 sensor plugged in or out. The Best Dual Sports bike guy thinks it works better unplugged and I will test it again to see.
‘Future Man” at Best Dual Sports Bikes is a great guy to purchase from. He responds to E-mails and answers "after purchase" questions. The folks where the Fuel Box is made provide great service as well and I recommend them highly. He also ships USPS and work with you on custom values if you ship internationally which will save you money.
I am happy with my set up because it is “bolt on” without having to program something and it works well without major mods like new, cams, larger throttle bodies etc. I wonder sometimes if I should have purchased the FMF Power Core Muffler since it has more power and is a little less expensive (louder too). The Q-4 is plenty loud though when the throttle is on and purrs nicely at cruising speed and I think the performance is good.
If there are negatives I guess one would be that I burned a hole through my best jeans the first day! (FMF does not include a heat shield). I was able to modify my old heat shield however, and it looks ok. If you want a fancy one, there are some on E-Bay. Of course, more power means less mileage. With my riding style I dropped 5-6 Kilometers per liter estimated with the stock sprocket....haven’t measured the 13 tooth mileage yet, but it may be close to the same. (Of course, when you have more power, one tends to crank it on more..the fun factor sets in!).
I am not a professional, but I do ride lots....so this review is subjective and reflects my honest opinions. Riding is Fun and this setup makes that Honda
More Fun!
(original heat shield modified)