- Joined
- Jan 31, 2010
- Messages
- 3,022
I think this stuff about twin carbs using more fuel because they make more power is a bit nonsensical. Half a thou of an inch wear in a needle jet when using petrol should take the edge right off performance - much more than the difference between twin or single carb.
Well...if you make more power you require more fuel to do it. Twin Amals can produce more power on the Commando than the typical single Mikuni. As I have experienced numerous times, a pair of Amals on an 850 will pull away from an 850 with single Mikuni and achieve a higher top speed. It will also, of course, use more fuel if you choose to exercise that capability.
I agree that the needle jet wear will make a fuel consumption difference while cruising but I think to make comparisons, we should be assuming that whatever carbs we're discussing are in proper, non-worn condition, correctly jetted, and have adequately sized, clean air filters.