A friend and I just bought a couple of new '04 banshees. We are new to this 2 stroke thing and need to know what oil and what ratio. And we wont be using amsoil. At least not right now. When we brought them home they ran like crap. Sputtering, backfiring, and not much power. The dealer had the tank half full and I am sure it was pretty rich. The manual suggests 24:1 with the yamalube. We want to get away from that for price reasons. Now if we switch to a different brand, what mix should we use? Also, do you have to run these rich for the break-in period? Is synthetic okay to use? Another question, It is butt cold here in minnesota, is it okay to ride them in the cold? Thanks for any help!