The Shifter bushings from Kartboy.com are a great purchase. I got mine about a week after sending in the check and installed them today... What a difference the shifting is alot smoother. I don't know about any of you other MP3 owners but my 1st gear was a little likagely feeling when putting it in 1st and 2nd was a little wierd feeling also. But with the Kartboy Shifter bushings it has all gone away nothing but a straight shot nice and smooth into all gears. To sum this up 25 bucks is well worth the change.