i run open carbs on my race 300. Doing that has caused two flat spots in the low to mid range when accelerating on WOT through a given gear. I made up a protective panel out of thin sheet steel that sits in front of the shock absorber to stop pebbles or whatever flirting into the carbs off the rear wheel as a precaution - it maybe also acts as an airbox wall in a way? I've not run the bike without it to see if there's a difference yet. Seems that a lack of perfectly still air around the carbs upsets power at certain revs - but only a little, i'm not going to do anything about it because its not really a problem.

I had a similar issue with my MZ racer - which had no fairing and therefore even less still air around the carb. I found it seemed to run richer at higher speeds - so 4th or 5th gear speeds, possibly due to a slight vacuum forming around the mouth of the carb as air flowed passed it? It always ran fine if i dropped a few jet sizes.

As for sheer power - the 300 is definately fast but i dont know how much of that will be down to the influence of the open carbs.
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