Hello everyone, I'm new here at thumpertalk and completely new to dirt-biking as well. I recently bought my first bike, a 2004 wr250f. A bike purchase that has been long overdue since I rode my first dirt-bike (80's honda xl80) many years ago. I would consider myself mechanically inclined as I do any of the work on my SUV and have picked at/got in the way during various repairs to dirt bikes, snowmobiles, atvs, etc over the years. The history of the bike is completely unknown to me, although the bike does not seem to have had too hard of a life. The bike seems to start, idle, drive well all through the gears, steer and stop without issue. I have also browsed the service manual the past few nights to familiarize myself with the bike. I must say I was surprised at the service intervals, but I'm sure the manual may over exaggerate the frequency of some maintenance. The bike has been striped of a few factory pieces: Lights, electric start switch (motor is still there), kill switch (only the on/off button is there), kickstand and the exhaust has been replaced with a 'fmf powercore 4' (i think anyway). I'm still unsure if/and what 'free mods' have been done but expect some have been due to the other modifications. I have ridden the bike probably about 5 minutes in total since i bought it a week ago because i want to make sure it is 100% reliable before i do so (despite the pressure from friends ). There are two things that concern me so far. When I quickly twist the throttle from an idle it bogs down for about a second. (I'll upload a video soon). The other thing which concerned me much more was oil pouring out of the dipstick hole when I went to check the oil. (let it warm up, waited, then checked). Based on my reading on here this could be due to too oil much or possibly a dirty/clogged frame oil strainer. From browsing the forum i have put together a list of things I should do before I ride, considering the bike has an unknown history. -Change oil, replace filter and clean oil strainer in frame. -Replace air filter. (I have a k&n recharge kit, would this do rather than replace/) -Change coolant. -Grease suspension linkages, axles, and steering head. (What type of grease is best?) -Lubricate cables and chain. -Change spark plug. -Check the valve clearances -Replace the old gasoline in tank. Anything here that I don't need to do before my first ride, or anything to add? Any quick tricks on checking the valves or just follow the manual to a t? Should I do anything with the carb? (fairly intimidated by it, have no former experience) I also have some seafoam left over from cleaning the throttle body in my SUV, is it okay to run things like that through the bike, if so where is the best place to run it through? Sorry for the long read but I wanted to be in depth as possible, and also introduce myself. Will post pics asap!!