I've been noticing lately that the secondaries on my carbie (the standard Carter carbie) have been sometimes been working, sometimes not, and that it seems to be related to the temperature. I know that the choke works off engine temperature and that the secondaries don't work when the choke is on at all, but it seems really sensitive. The pattern seems to be that when driving on long open roads in cold weather the air cools the engine just enough that the choke won't fully disengage to allow the secondaries to work, but when coming into traffic, after a few red lights they seem to work again having warmed up just enough. Plus when it's really cold in the morning it seems to be over-choked and bogs itself down with too much fuel unless you keep the rev's up by leaving in 2nd or 3rd gear.
Is this an easy thing to adjust, and if not, does anyone know of a reliable mechanic in Western Sydney who is experienced with this carbie and won't make an arse of the job? I only want the choke looked at, I'm happy with the fuel mixtures and that kind of stuff.