95 cbr 900rr recently purchased in pieces. Bikes all back together, new harness, rear brakes etc.. had it running for several minutes, idling and revving, no problem, went to take a test run, and as I clicked it to first gear it stalled. When I finally revived it, it ran terrible. Bike sat for a LONG time and its also bored .40 over with bigger cams and valves. I believe previous owner didn't jet it. Could jets be the issue, or should I start by doing a thorough carb cleaning? Thanks in advance!