Got a 2014 300 , speak to Chris at Splat ref carb settings - top comms and advice , did add a low compression head to mine but still got the fast throttle - makes it a lot nicer in the muddy snotty sections.
Oh and get a couple of spare braketec front brake master cylinders if it has em!!!! Plenty of links on the site for the cursed cross hole / burr dilemma!!