[redyaris]

As I have mentioned in privieus posts there are a series of solution options any of which may do the trick. I will try them all in order of dificulty of implementation. The most difficult is the relocation of the radiator and/or the addition of a second radiator positioned at the rear of the bike dumping the hot air into the wake. In the end I also want to run the same smaller main jet size in both carbs. how effective the relative cooling of each cylinder is could be contoled by restriction of flow 60/40 so that the rear cylinder gets more of the flow and or by the order of flow through the system...
The Yamaha 250 V-twin runs a single carb that feeds both cylinders so they seem able to avoid the problems that Honda solves with two differant main jet sizes. What Yamaha does I have no Idea so I may have to look into it.