Hi everyone. First post. I have been lurking for awhile. Wanted to share my carb experience. I pulled, cleaned, and synced. 1 and 2 spark plugs were very dark compared to the others, but it ran great. Search after search revealed re-clean the carbs and everyone said they cleaned them very well and that can't be the problem. I spent more time looking for an answer than it did to pull them back off and re-clean them. When I pulled them again everything appeared clean I could see through the jets and carb cleaner seemed to go through all the passages. After putting it back together all the plugs were the same color after one short trip. I must have missed something somewhere. Clean your carbs! The first time sucks, now a blindfold 10mm socket for the air box and a Phillips your home free. Sorry I'm for the long post.