So im new to this world and have a couple questions that i hope you guys can help me with..so i was recently given a 97 cbr 600 f3
it fires up and rides fine in first gear but once you shift to 2nd or 3rd it bogs down under load.i did some research and looked through it*(rebuilt carbs)*and found out the motor is a 91 f2 motor
i was wondering if maybe that is the problem (wiring harness)its just weird because it fires up perfect and 1st is like heaven*any input will be appreciated thanks-Bryan

 

you could clean out the carbs