I did a valve check on my nephews 04 450 over the weekend. This was the first valve check this bike has had since NEW. Ouch... Luckily they were all on the tighter end of in spec but I let them go until next time (much sooner...). The oddity was that I noticed at TDC Compression the cam chain seemed excessively tight. I pulled the cam chain tensioner off to make sure it was working right and it seemed to be stuck. I had to give it a really good turn to free it up. Wound it down and installed it again, gave it a few kicks to spin it around and then the chain had a little give at TDC compression. Will these chains tighten up like that or is it normal on these motors for the chain to be tight at TDC compression? As long as I got the tensioner in and its working right it should be fine correct?