Hi everyone, I have a 2004 RX1.. when I drive through a wall of snow at the top of a hill or drift the odd time the engine sounds like it drops a cylinder and/or the engine boggs down.(with a metal,scraping noise)...I let off the throttle for a second then get back on it and its fine, Does anyone have any idea what would cause this???? Also too, on full throttle on a groomed trail or at the top of a climb I get a vibration at my feet, and would top out at 125km/hr, would a bad belt cause this??All of this started after I had the carbs re-sync'ed at the dealer.. Thanks for your help. Marc...Up-dated- noticed when putting away sled after the wekend that the throttle cable had too much free play and carbs would only open maybe 85%- which I think was the cause of my slow speeds. Any help would be great. Very fustrating since this was my 3rd time out and I just purchased the sled.....