My first post here after reading the posts on this site for the last 1/2 year or so. I have ridden and raced 2 strokes all through the 70's and 80's until injury stopped me for a while. Last fall I picked up a nice 04 450 to follow my 8 year old around. The bike was used but in really good shape, (original tires, paint barely worn off the frame) After the first few rides I got the starting down, and I could start it on the first kick just about every time. This bike was great, no unusual motor noises, as a matter of fact it seemed to have less motor noise than the YZ250 that I just sold. Three weeks ago we were riding and I endoed off a creek bank and submerged the bike and also myself. The bike was running when it hit the water I know this for sure, but when I finally came too and picked it up and got it out of the water and tried to start it, it was water locked tight. It was probably 3 or 4 days before i could finally drain the water out of everything, (slight spinal cord damage from landing on my head) so within a week I had drained the oil, cleaned the carb and air filter. While I was at it I changed the flywheel to a gytr off-road one I had bought off of ebay. Put some cheap oil in it to flush the rest of the water out, new gas and tried to start it but nothing. Pulled the plug out and replaced it had good spark still doesn't start. Thought the cam chain had maybe skipped. With the new flywheel and no marks on it had to do TDC with a screwdriver in the spark plug hole, and the dots on the cam sprockets seem to line up correctly. Put everything back together and I still cant get this thing to start, it has good compression, no unusual noises when I kick it, good gas, clean filter what am i missing?