I just bought a '01 yz426f, and may want to do the BK/GB mod in the near future. I am very new to jetting and would like to know what size of jets I should buy? The altitude I ride is in the 428 to 481 meters above sea level range and I ride mostly in +10c to +25c temperature range but sometimes as low as -15c. If you need any more info let me know and I will try to get it. Thanks for any help P.S. are there any online instructions for changing the jets on one of these bikes?