Factory b pipe cooling help please

Hi everyone iv got an x2 with a 760 engine iv just put a factory b pipe on it iv set the pipe up but I’m having problems with the water box cooling it’s get to hot, I only got one cooler coming in, do I need to do dual cooling on it
The water box iv got in it at the minute is a stock Kawasaki 650 drilled, iv now got an ATP water box to put in will this cooler better or do I need to do the dual cooling coming in thanks
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