Feedback Score: 3 reviews
Join Date: Sep 2006
I back-fires in air box at low rpm. Through exhaust when I let off of gas. I put in the NFKL needle in the front carb as this was a supposed to fix it per Kawasaki bulletin. It has stock needle in the back carb. Machine has not had any other work done on it to my knowledge. Someone may have messed with carb adjustments.
Yea sounds like a lean situation like plugged jets. You really need to drain the gas and make sure your jets are not plugged. I would pull the carb and use a cleaner also. 500 miles is not much on a 05 and the gas is very old even though you tried to dilute it. Make sure the slides move freely . Pull the filter and reach down on the slids and push in. They should go in and come back out with a little resistance.
Also it should have stock needles and jets and not dynojet crap.
Brute Force AMR 840, 13:1 pistons, 4X cams, extended rockers, Big Kev's Performance Full race port, +1.5mm exhaust valves, +1 mm intake valves, muzzy pro, 39mm carbs, programmable dynatek cdi, custom airbox, JHmachine clutch, HPD plain primary spring