FMF Power Up Jet Kit

Performs exactly as advertised. Aside from accessing the carb pretty simple to install. The instruction were clear an easy to follow. Followed the carb setting from instructions and bike started with just 2 kicks after install. Removed dead spot in throttle and can definitely feel the difference. No bog anywhere. Great an improvement in the bottom end.

This is a fantastic kit my FMF. It was fairly easy to install myself and the gains in power were felt instantly. The instructions are easy to follow.

Directions are difficult to follow, doesn't contain the jets you need. It only calls to replace the needle, and spacers. I spent days trying to get it to work then bought a JDM kit and was running in an hour...

FMF Customer service is a little weak, waited forever to speak with a tech, then his information was like he was reading from a book. Called back and actually spoke with somone who knew what they were talking about and suggested a fix for the bog I was getting, it worked.

I am very pleased with the extra power!

installed the jet kit after installing a fmf powercore full exhaust system and K&N filter. it really helped with low and top end power while increasing throttle response and acceleration. directions were fairly easy to understand. they should add more tuning tips in instructions because it is very vague on what to do after installed. with these additions my crf 250 rips!

I own a 350 Warrior with a K&N filter, FMF Q4 exhuast w/power bomb header. My quad was ripping so I was hesitant to change the jet. But, FMF recommended to run the kit, so I did. After reading the informative yet slightly complicated trouble shooting and jet selection page. I installed the needle, main jet, and fuel mix adjustment screw which was very easy(installation directions was great). I notice my stock jet is #145, so I install the recommended jet #148, slightly larger. But when I ran it, at mid throttle it bogged and couldn't run great. I was very surprise, so I changed the jet to a larger #150, and it still bogged. I then decided to install the stock jet back in just to see what would happen and it started to ripp again. The needle setting was the only thing that I found useful in the kit. I did compare the needles and the FMF was slighter more tapered. If you are planning to continue your build or mod, this kit would be great because it comes with many jet sizes for your mod needs. The kit does include #146 which is a size in between the stock and recommended #148(didn't work) that i haven't tried yet, but the stock jet runs SUPER, so I'm gonna leave it until I feel like taking out the carb again. Also, I'm gonna get a CDI with higher RPM to see if that would make a difference. But, I will say that with the jet changes.. my quad does redline a little faster, because I do notice that I have to shift 1st and 2nd gear faster, so acceleration did improve. I also can easily wheelie my quad now, low end seems more responseful. That why I'm giving it a 4 star.

Not even going to leave a monster review story for you guys to read, SAVE YOURSELF THE TROUBLE AND BUY THE JD JET KIT!!!!!

Bought for a 05 trx450 that was a basketcase. I installed a new Hot Rods stroker crank and the quad would start making a weird noise as it approached mid throttle and stalled out if you gave it any more gas. This jet kit is very simple and easy to install for anyone that knows their way around a carb and it really bought the engine to life. HOWEVER! i did not feel like the engine was powerful enough compared to my crf450r's but this is also my first quad every so maybe im not use to the weight difference or still need to change the jets a little for the right set up.. Either way, this kit got the quad moving on its own power and im more then happy

Made the bike run very poorly. I followed the instructions and put in what they recommended... Bike ran very eradically. I changed the settings on the needle jet, the main jet size, the pilot screw turns... same eradic problems, the bike is unrideable. I made all these changes one at a time, very methodically. I went back to the stock jets, and the bike rips again! FMF doesn't even make jets, these are dynojets. Annoyed.