1992 California Venture emission canister Issues Running rich

[lovetoride]

Hi guys hope you can help... So the mechanic working on my bike just did the following adjusted valves(4 were tight) did full carb job, after all this the bike was hesitating on the start. once up and running it ran great . he notices gas leaking from emissions canister he tried to bypass canister and now the bike runs way to rich  says its not getting enough air and is making it run rich.. any ideas as to whats up with this? thanks