well, try one of those weston ones from IH. Ive got one on my west 50 and its a loverly pip. The throttle doenst snap open but its soooo smoth to open,but not sluggish. Id think it improves in power aswell but i havent tries it without

Ive also got a cheepy perkis one on my cougar. brilliant thing. So snappy throttle. perfect for a funfly mid rande is brilliant

Get one for the C50, its worth it