Thanks for getting back.
I changed the lambda. Didn't change the second one because T4 is showing correct readings. I got the T4 after changing the first lambda.
All readings on T4 are spot on. From cold start right up to the fans coming on.
I'm in France and use E10 petrol.
I also have a ZR 120 that is showing similar signs.
I'm wondering if I might have an injector problem. I heard that ethanol attacks plastic injectors.
Plugs, leads and coil packs are new.