Like the title says, I just picked up a 2006 crf450x for a great price. I tore it down to install SS intake valves and rejet etc. but upon reassembling, the base gasket that I installed is leaking oil (have read that it was probably for an R), and also the oil filter housing is leaking because the lower (longer) bolt stripped out the housing so I had to order a Helicoil kit to rethread that bolt. Now my question is when I FINALLY got it running (see below), I rode it for a grand total of maybe 20 minutes... do I have to repurchase a new head gasket after that little of use or should it be fine?
Some other issues I was curious about that I ran into is about jetting. I know there are a million threads on this, and I followed them... Im in flagstaff at 7000 feet and summers temps have been consistent 70s and 80s, When I initially took apart the carb I put in 170 main, NCVS needle 3rd clip, 42 pilot, 55 leak and did the AP mod. The bike wouldnt start and when I finally had a friend mess with it he got it started but the exhaust was red hot. He claims it was a jetting issue but from everything I have read, those jet settings seem to be the most recommended. I pulled the carb again and put in a 165 main but did nothing else. I also pulled the header again and reseated the copper washer because i read i may have torqued it too much allowing air in the exhaust at the head (hence the read hot lean condition). after doing that Ive got it started but its not easy to start and the idle is pretty erratic(revving up and down). I cant get it started with the estart either, only kick start. where should I go next, I am waiting for the parts to come in at the start of next week so for now I am brain storming, but I definitely am getting a new copper washer for the exhaust. What could cause the idle to move so much up and down? Thanks for your time and any advice.