I went to check on my bike today, which I winterized back in November. It has been sitting in a garage almost untouched since. With spring fast approaching, I figured I should go run the bike for a few minutes to make sure all is good. I turned it on, and after a minute of running it smoke started coming out the bottom of the exhaust (dead center on the pipe). Obviously I find this to be alarming, and am looking for advice. Here's what's going on with the bike:
-Bike is used, with one previous owner. Has 12,000 miles.
-I laid the bike down in October at 20mph. Mechanics put $1200 of work into replacing broken parts and didn't find anything damaged internally
-I've ridden the bike numerous times since laying it down without any issues.
-When winterizing I changed the oil BUT NOT the oil filter. I plan on doing that when i change the oil again for the riding season.
-I put sta-bil in the gas tank
-I put an oily rag in the exhaust and air filter to keep out condensation (both were removed before I started it
-Bike is located in Brooklyn, and the garage is not really heated (there are some hot water pipes running along the ceiling above the bike, but heat is minimal).
-Aside from smoke, bike looks and sounds perfectly fine.
-I turned the bike on once before for a few minutes back in December without any issues.
I've heard that it's not good to change the oil and not the oil filter, but, just to reiterate, I have not been riding my SV. I was hoping that turning it on and running it for a few minutes wouldn't hurt it.
Any help/advice is appreciated. Thanks in advance.