I checked the thermostat and it seems to be fine (opens half way down and was told that is regarded as "fully open").
Replaced the coolant (30%) and destilled water (70%).
It might be that my engine is running too lean

I read all the relevant posts on jet sizes etc,etc, etc, and would like to know (in laymans terms and without too much technical "confusion"):
158 Main jet is recommended for inland (Pretoria). Would there be any negative effects on using a 165 (except for higher fuel consumption)?
Will this cause the water temps to come done?
More dof questions:
To balance the carbs I adjust the throttel cables (where it goes into the carbs)? YES/NO

How may turns +/- should the Air Screw jet be turned (from fully closed / screwed in)?
Can the idling jet / Screw be turned untill the desired idling rpm is obtained or is there some other secret to it?
Thanks.
Jodie.
083 5500 977