picked it up from my mechanic and holy $h1t did they tune my 550 up. It needed too much work for me to learn this quickly so I paid dearly for it, but I know and trust the mechanic who works on a lot of older bikes. Adjusted valves, cam chain, points, new plugs, sync'd carbs, new tires, and inspected. Wow, I didn't realize how much power this bike was missing, being my first bike in two decades. I pulled out in the parking lot and the bike just lunged forward with barely any throttle. Roads were soaked from a 20 minute downpour and those new Bridgestone Spitfires stuck to the road pretty well. Now just stop all this freakin rain in the northeast so I can ride!