I have a 91 rotax 800 triple, The other day My cousin took off my air filter boxes and sprayed Carb cleaner inside carbs.......I took it for a ride and was running GREAT! But And there is always a BUT! After i parked it for an hour or so I was heading towards the gas station with my son And it was sputtering and KNOCKING really bad. I pulled the plugs one a time and found that ONLY ONE cylinder was running( Clutch side) when i pulled all three plugs and set them on the head and pulled the cord ALL three had Good blue spark. after putting all plugs back in still only running one cylinder? Any help would be greatly appreciated!