Thanks guys, big help. The top end was done when I bought the bike in '98 - has not been done since. Pretty sure a higher compression piston was put in (weisco?) because i was told to run higher octane fuel when i bought. Probably less than 50 hours on the bike since I bought it 12 years ago.
Power is pretty good overall, still runs like a beast! However, I have noticed that it does not have the power that it once did. I just put in a new filter, and repacked the FMF spark arrestor. Far as I can tell, jetting seems to be good all around, but just a small drop in power where I use to notice it either in climbing or in 3rd gear just riding the trails. Now, I might have to shift to 2nd, where 3rd would do fine before.
I have not done a compression test, and usually run either a mix of 108/91 octane, or sometimes 100 octane if I can find it. Premix is approx. 32/1.
thanks for your help. I just had the forks and rear end rebuild by Race Tech using gold valves, so I plan on keeping this bike for a long time! With the new suspension, I ride confident with my buddys on new 450's! They try to keep up with me!
-Scott