Have an 03 800 REV. Have had some clunking when starting from a dead stop, like a drag run. Something clunks multiple times as I power up. I have read alot on here lately about the RER and it's clunking and that that is normal. If it is, then does it do it once at launch off or multiple times through the powerband. A couple of people on here said that my track might be too loose so I did tighten it up a bunch, but what it the "right" tension, what Ski Doo says or looser or what? Thanks in advance for all the replies, this is my first Ski Doo and first REV model and have been super impressed with everything else so far.