I just bought an 04 crf450r from a friend who races and gets a new bike every year, he just had the valves adj. a few hours(of riding time) before I bought it. everything was fine and dandy.
Now I am having starting issues, just before I had issues I reoiled the air filter, and accidentally left the gas on for about 7days without realizing. Take into account that I live in SD and it is pretty cold here, although I do keep the bike in a heated garage kept at 50 degrees F. I did also hit the rev limiter a couple of times when riding the first few times, the bike is a screamer, very happy with it otherwise, except the weep hole leaks a little coolant, hopefully just a seal.
Should I reheck Valve clearance? Could it be a decompression adjust? I does pop while kicking and kicking and kicking to get it started.
Or could an over-oiled air filter cause all this?
I ussually have to hold the hot start lever in to get it started.
Changed plug. checked Pilot screw adj. runs fine when you finnally get it started, exceptwhen cold it will of course sometimes die with a loud clatter when it does.
Rich you know your stuff help please
Thanks