Neal, not sure if this is of use, but here is how the rad fits for the RS250 NXA Ram air.

The standard set-up has the air intake routed around the side of the rad (you can see where its shaped) and into the airbox.



For the 'A Kit' Airbox, the intake is routed straight over the top of the rad, and it has to be 'shaped' accordingly!!


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Rich
MC21 Track Bike / RS250 NF5 'Spencer', NX5 'Cadalora' & NXA 'Aoyama' / RS500 / Two Brothers Racing RC30