5th gen rough under load below 3.5k

Sometimes the little things are the hardest ones to track down. Living in PA we get plenty of snow and time where the bike sits in the garage and waits. I always fill the tank with fresh gas, add a healthy dose of Sta-bil and ride it fifteen minutes or so to make sure it reaches the whole system. In the spring I run out the old gas and with the first fill up I add an appropriate amount of Seafoam fuel system treatment. I then take the bike out and flog its balls off. That stuff works wonders to clear any gunk out. Highly recommended.

 

I haven't tried the seafoam - although I've heard lots of good things on it from this forum - but I've actually been a fan of Techron for years. I run it through all my vehicles.

 

What is your engine compression? A good test on an engine with 60k.