Ok, I have had this banshee for a couple of years and I lend it out and get it back with these problems. Saw some oil leaking from the left side cylinder head, backfires a little, and I can rev it to 5000rpms or so and it has no torque. Had trouble starting it, took off the air filters sprayed either and it still took a few kicks to get going. With the lack of power I get about 10 feet before it goes no more and dies. I have no clue, checked spark, and checked compression both seems to be ok. Any help would be appreciated.
Josh