2006 zzr600 hasn’t me stumped
Alright well I’m gonna explain this the best I can because I’m two months of messing with this thing with no luck yet so here we go.
Bike was running when I bought it but sputtered pretty hard with loss of power in the high rpms WOT. I tweaked the carbs and got it smooth and then after a mile or so of riding down the road it started to bog hard and what felt like miss and then complete loss of power with no restart for hours until it was completely cooled off again. I’ve cleaned the carbs completely top to bottom multiple times, new plugs, synced the carbs, second trip out it had way more power but then a mile or so out it bogged out and lost all power again and won’t restart until hours later. I’ve tried every position on the a/f screws from 1.5 turns to 3.5 turns with no difference, once it hits 200 degrees it will bog out and die 10/10 times. Let it cool down completely to under 100 degrees and it will crank and run seemingly fine until it gets hot and dies again. Oil level is normal, fuel pump is new and working as it should, coolant is normal. When it is running I can spray the exhaust with water and all 4 evaporate instantly so I know they are firing but it just doesn’t want to run good or stay running. Believe it or not I can’t even find a shop in my area that is willing to work on it because no one wants to mess with these carbs so I’m stuck doing it myself. It has a cut and modified exhaust high flow slip on (attached image) and a k&n air filter. At a loss to what to do at this point short of buying a jet kit and hoping it works.