You got big carbs on the car but have you fitted a bigger fuel pump? You might also need a restrictor as well. My friend who runs cbr600 carbs ran his at 7psi and it ran alot better but according to him the older style cbr600 carbs run at 3psi. I would also advise getting a sports clutch for it aswell just to be safe.
I always wanted to know what happened to porks old K10, I loved that car its a very cool micra indeed. Also is that a Nisssan steering wheel as it looks the same as my Super S one?
EDIT: Just looking at your picture and did you do the engine swap on the side of the road? If so I give you props for that.
