RE: 2000 engine
I have owned a 96,98,2000,and 2002 all 501s
The 2000 FE501e is one of the most fun bikes I have owned in forty years of riding
Light weight, great suspension and balance, great fuel milage(EASY ON THE THROTTLE 50/53 mpg) and excellant power
Well over ten thousand miles replace one piston and four sets of rocker rollers
The Dellorto carb was simply to work on and worked great, replace the needle jet every three months because of wear, no big deal
Very reliable if you understand high performance four strokes
I wish the 2009s were lighter, lower seat height,had a 501 with the power of the 2000 and got better fuel milage(very important) still thinking of buying one, there great bikes
have a great ride