My bike has a puch head and dellorto SHA carb. Its has a MEAN load of torque and acceleraties well. As soon as I Hit 27 mph it hits a wall though, because I have to work out my jetting. It also feels like Im running out of gear. Im gonna get a 71 jet + 39 tooth sprocket and she'll rip! I wouldn't be surprised if she hits 32-33. Ps my intake and exhaust are part matched too.