I know there is a million topics about this but here is my own questions. I have 05 DRZ SM about 18k miles. Got it last fall and rode it 2 or 3 times and it ran alright. I pulled it out from storage and it only seems to run good on full choke. I replaced plug with new NGK and has a mix of 1/4 old gas and 3/4 of new gas. Ran a little better and would idle good every now and then. It also developed some sputtering at around 35-40 mph cruising , along with a lot of back firing once you let off throttle. I pulled carb tonight and cleaned it out, and am getting 100% fresh gas tomorrow. I also plan on checking valve clearance and timing chain condition. I have mods of 3x3 K&N filter Yoshimura off road full exhaust Jetting: 160 main 80 pilot air 45 pilot 2 turns on fuel screw Around 800 ft above sea level Does this jetting seems correct for my set up or should i change it up before I re-install carb?