I just bought a 2000 zr 600 efi, with black magic twin pipes, black magic heads, clutch and efi chip. I noticed when i try to ride it at a steady speed that it hesitates like it doesn't want to go but if you gun it it takes right off. Any suggestions? so that i don't have to take it to the shop. Also when you are done riding it does not want to start back up when it is warm. PLEASE HELP!