Honda choke problems

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Honda choke problems

Nee help  my Honda cbx 400 custom (87) had a problem starting when cold.

I use full choke bike starts and runs ok for 30  40 sec then it drops back to nearly cutting out and some times it does cut out. have to leave it for a minute before it will start again,and then I have to hold the throttle open for 1, 2 minutes before it will run on it own. when it does run its on very low rev and will slowly build up to a high rev on the choke. it seems to be much worse in winter.It drives me mad as I cant let the engine warm on choke when putting on helmet and gloves.I have tried half choke,no choke makes no difference. when bike warms up no probs and runs fine.