After last weekends ride I was kinda disapointed with my dececision to buy another 400 instead of a 520, so after some soul searching and board searching I called Thumper racing and talked them into selling me there almost ready to sell 454 kit, which included a 11.1 to 95mm Wiesco pistion, special gaskit kit and cam chain rivit link. To save some time I bought a 520 cyl from my local KTM dealer instead of sending my cyl out to be bored and replated and had all overnighted so I could begin my journey deep inside a RFS motor (for me anyway) 7 hours later (that's a story in it's self) It runs! After a 3 hour ride today I can honestly say that's the best $575.00 I ever spent. I would have to say it's some where in the ballpark of 4-5 HP gain but the real gain is the torque, last weekend when coming out a turn in 3rd the bike would move briskly on to the next turn without much fuss or excitment, but now the front end starts to get light and/or comes up and the midrange is outstanding! it almost seems to have a "midrange hit" now and it still seems to rev to the moon. I have a PC T-4 exhaust with the 2" outlet (have a 1.5 ordered) and 14/52 gearing on a 02 400 EX/C. I do have to thank my local dealer for renting the cam chain tool to me and making me a great deal on the 520 cyl, he seemed as excited about this as I was!
Can't wait til next weekend now
Wes
Can't wait til next weekend now
Wes