It is always nice to gain a little power, especially when it is easy to do and not expensive. I ordered a Sigma Jet kit for my XR250L for about 30 US dollars. I had a friend of mine install the kit and now I am more then happy with it. I was thinking of buying a Mikuni carb to get more power, but this kit hasn't disappointed and is worse every penny. I only can recommend it, it was the best money ever spend, the power increase is amazing and it saved me a lot of bucks compared to the mikuni upgrade.