snowman , i am also running the 52.5 and 165 right now , im going to run 50's and 162.5 this weekend....if there is any snow that is .....but i was seeing 1268 with the 52.5 and 165's but my gas milage sucks ...maybe 80 miles to a tank ,im going to the 50 p-jet cause im fouling plugs like crazy when i first start the thing in the morning and the snow is black where my exshaust spills out ....once it warms up no problems all day and it runs real strong , but gas milage and the fact i dont run the lakes, when i do race its for maybe 1000 - 1500 ft.most the time its trails and off trail for me not long lake runs , so i will see what happens with the 50's and the 162.5 ...on the clutching are you running the original heel clickers or the hammer time???