Went back to basics as advised and found the following when reading the temps on the down pipes from the cylinder heads, used a fluke infrared thermometer so should be quite accurate?
RHS Cylinder running at 200 degrees centigrade.
LHS Cylinder running at 373 degrees centigrade.
Quite a difference at idle so may be magnified when running at speed, anyone got any further ideas with this information?
many thanks internaught!!!!!
With temp values that large its clear that the RHS cylinder has a a problem ,
I'd say one or more plugs / coils / wiring has an issue or at a long shot the timing pulse needed to tell the ecu where the cam / crank and TDC is, is not correct ( i'm not sure how the timing works on a GS)