hi, i am currently a wr 400 f 99 model owner, with power core 4 and ims thank and seat. the bike feels great but it run alittle hot in my country singapore, though i have the ims tank but sometime i still feel the exc is better. i am thinking to swicting to a 400exc 2000 model, and i need to know which is a more lasting bike, as i have hear story that you have to change the cam bearing often. and how thws the handling and power of a 400exc compare to wr400f. and not forgetting the e starter as well as better brakes and juice clutch. thanks.