Pardon the expression but it goes like a red raped ape!! Holy gizmolley....stuck the new carb on, turned the fuel on, dropped the clutch and whammo. It sounds WAY better on idle. I mean it sounds great. It revs free and easy and much better sounding. I used nothing to seal the carb to the intake manifold. Just slapped the carb on. There are some subtle visual differences in the carb. but I didn't open it up......why? Anyway it pulls strong - has way much torque. 35°F and snowing and raining so I didn't ride far, but after all this time my bike really goes!!!!!!!!