Hi All Apologies in advance for the simplistic nature of the question, but I haven't been able to find the answer, despite hours on this forum. I have just got a "new to me" DRZ400SM 07, 3000 miles and sold to me as stock. I was looking into doing the 3X3 mod and re-jetting as recommended and was trying to familiarise myself with the DRZ. Removed the seat and was surprised to find a 3X3 hole in the top of the Airbox...so only almost stock! The question is how can I (easily) tell if the re-jetting has also been done? Preferrably without striping the whole bike down. My level of mechanical competence currently extends to holding a torque wrench and reading a workshop manual. The only performance guidance I can give is that it generally seems to run well, though at slow speeds (in town traffic) the trottle response is not the smoothest, a little "jerky". Any help/guidance would be more than welcome.