Looking for some guidance on this. I recently built a Sphinx 350 cylinder with 4 mil stroker(363) with MX port, V-Force 3 reeds, Keihin 38mm A/S carb, OEM intake boot, open aluminum airbox, LED big bore pipe, CR Ignition. I love the motor, am very happy with it and am not trying to bash the builder or anything of the sort. I trust his work and experience but was told it would be in the area of 60-65 hp on his dyno. When I had it put on a dyno locally it made 53 hp. I understand each dyno can vary with different results but was not expecting that much of a gap. On the track it does feel a bit under powered when compared to the 450s. Just looking for some guidance on what I might be doing wrong or where I could gain some extra hp such as going with a bigger carb, aftermarket intake, etc. Thanks
