First and foremost my bike runs excellently. In fact, even when I'm noticing the issues I'm reporting here, I've never had a loss of power while riding and it starts on first kick no matter what. A few things I find very odd that have been happening recently: 1) I have to refill my coolant after every 90 minutes or so of riding. On a standard two day trip, I might put in 6 or 8 ounces of coolant (I suspect, but not measuring) each time I come back to camp to get food/water. During the entire trip, it feels like I've gone through a fairly large amount of the 50/50 I'm putting in. I originally used Yamaha's coolant, but noticed the same issue. And even though I'm filling up when we come back, I've probably seen and heard the steam/boiling for a good 30 minutes prior. So I would have been riding on what seems like empty coolant for a good period of time. 2) I can hear the coolant or lack of coolant boiling/sizzling as I ride, if I happen to slow down enough to notice it. 3) If I kill my bike after riding it really hard, or sometimes even idling down hills and waiting on others, it starts to whistle from the bottom of the engine for almost an exact 2 to 3 seconds (when it occurs, but isn't every single time) and a white steam comes out. The steam smells, so I'm assuming it's burning coolant or something else possibly, or maybe just the engine letting it out as it tries to cool off. 4) Sometimes even as I ride I'll notice the steam coming from the front and sides of the engine. 5) I have not noticed any coolant or steam coming from the weep hole on the right side of the engine. In fact, I haven't noticed any buildup of anything near there. 6) The rider that spent most of the time behind me this trip said he noticed oil burning when I took off, but after that he said it was gone. Now that all that is out of the way, a bit about my riding style (maybe somebody can point out something I'm doing to cause this) and the bike: 1) The engine is completely stock except for the Z-Start Pro clutch I put in at the beginning of this year. The clutch seems to run great. I haven't had any issues with it. 2) I'm entirely trail riding 100% of the time. Tight turns, wide open trails at points, lots of slowing down going down/up steep hills with ruts, steep hill climbs, your standard trail obstacles. 3) A lot of the time I'm behind a rider on a 125 and prefers to go slower, which seriously disappoints me, but I'd prefer to stay in a group and have fun than veer off course alone. Here's what I know about my maintenance: 1) I change the oil after every weekend trip and it's usually a tan/milky color. 2) I clean the air filter after every trip and the intake seems free of debris. 3) I have not checking my timing. I realize I need to, but up until this year it maybe had 25 hours on it total. This year along I've probably doubled it so far. I would like to do the maintenance myself, and I could use a few pointers on what I need to check and what the intervals are and possibly some URLs with information on doing so. Thanks in advance!