Certainly a possibility that the choke is not functioning properly. I'm a liitle suspicious of the choke housing being broken, as the bike just had the carb cleaned. Either the carb was removed, or rolled, either situation putting the choke housing at risk. I'd look into that. The plastic nut that holds the enricher in place at the carburetor is a lesson in patience, looking for a place to happen. It's just plastic. You can over come it.
Tight valves will cause hard starting, usually for a hot engine. If the valves have become tight enough, it will be hard to start anytime. Need to put setting the valves next on the agenda. If they're real tight, getting them loosened up again will be like unleashing 15 more horse power.
“many a trip continues long after movement in time and space have ceased”- Steinbeck, [I]"Travels with Charlie"
[FONT="Century Gothic"][I]Sometimes your only available transportation is a leap of faith[/I] [/FONT]