Ok, so I have been working on a problem with my bike (2006 TRX 450ER), symptom: it wont start! I have fuel, oil, clean filter(s), good spark on the plug, as far as I know the starter is good...the thing that throws me off is that when the bike is warm or has ran for a bit...it starts no problem, it's when it's cold is the issue (and yes I have pulled the choke). One idea I got from a friend is that the carburetor is clogged (possibly a jet issue)!? The only caveat to that is that the 'RPM's' have to be kept up for an idle when it actually starts (when it's warm/ran for a bit)!? Any suggestions?