Quote:
Originally Posted by janvos39
I am still using the large carburettor of the 385 because that has an ingnition advance switch coupled to the butterfly. I am prepairing a smaller carburettor of the 250 cc Burgman but have to build the ignition switch function to this carburettor as well.
I expect some more torque when I can change to the smaller carburettor.
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I have heard about throttle response increase with a smaller carburator, persumably because there is a smaller volume of airflow that needs to change mixture before it reaches the cylinder. But I'm curious, why do you expect to see an increase in torque with the smaller carb?
AaronD...
P.S. Also I read above some claims that a "square" cylinder (same size stroke as bore) was best for efficiency. Where are you now with respect to Stroke:Bore ratio? Working backwards from 300cc and 71.2mm stroke I'm guessing you have a 73.2mm bore? That would make you VERY close to square at 0.97 Stroke:Bore ratio.