My bike is an R60/6, it slipped out of my hands and I guided it to the ground. (terrible feeling). Within a split second I had it upright again. I let it settle for a day and came back to it, turned it on and all was well. After a 25 minute ride (ave speed 40mph) it started sputtering and running like sh!t. As it appears after tinkering with various speeds and RPM's, at 60+MPH the engine chokes out. I have to glide to a stop and let the engine regain it normal idle before I can continue to ride. I have opened up the air filter housing and have given it a wiping. I also took off the rubber "elbow" tubes that carry the air to the carbs to give them a wiping. I sprayed carburetor cleaner into both carbs letting them to settle for 5 mins before starting the engine and maintaining a higher RPM for 60 seconds (according to the directions). I emptied both float bowls and sprayed carb cleaner within. I have cleaned both spark plugs as well as spray carb cleaner in both heads, as well as add "sea foam" to the gas in the tank. In the end, its running better, but not as smooth as it was before I tipped it over. What else am I missing?