Topic: straight trough exaust /carb rejet

[frank]

I have rebuilt motor (new cam, main bearings , valves , gaskets, seals ect.. ) on 1982 cb650 sohc , rebuilt the carbs with stock carb kits after sonic cleaning and have put on a set of straight through slip on mufflers now wondering if I have to rejet carb? runs excellent at idle but crapy after that, have tryed adjusting idle adjustment screw but no luck any info would be welcomed thanks

[splitt]

Think of an engine as an over glorified air pump with a carburetor. Any change that that increases or decreases the flow of air changes the fuel mixture. The majority of the time, you will have to rejet.

[BobbyR]

Splitt is right, if you have more going out the back you need more going in the front.