1988 1.4cl auto keeps cutting out while driving

[Lofty George]

Hi. I have searched the net and not really found a straight answer. There seems to be lots of posts about this issue. I have replaced the throttle body which cured the problem for about 3 days now its gone back to stalling at least 6 times on the 20 min drive to work. It also doesn't get up to temperature staying well below 70° not sure if the problems are connected.
Thanks in advance.....I'm desperate...its bloody cold on the motorbike 🏍