reddy,
i only have some old ,*starting the project* shots..
i need to get some of a completed KX250AF up.
I use a 09 KX250 yoke,,,
(similar to what you're using though)
here is the first mock up of the frame..
the radiators - yeah way tougher than the frame..
i ended up modding the lower tanks to clear the raised Y area..
tossed the left rad altogether, and used a right rad on the left side,,
flipped it over, then modified the tanks..(getting rid of the rad cap spigot) and added new hose barbs accordingly
there's a million different ways to skin a cat though..
you'll get it.