Thanks wilkin250r. Also, depending on the amount you increase the stroke you may actually have to get a longer rod to keep the piston from being pulled out of the sleeve at BDC. When you increase the bore only you are increasing the volume of air/fuel that can be pulled in to be burned in the combustion process; therefore it would not negatively effect the performance characteristics of the engine at the top or bottom end. If you have your heart set on a stroker try to get a cam without really long duration. You will have to get a short duration, low end cam to keep your low RPM cylinder pressures up to complement your stroker. Otherwise as wilkin250r said you will be getting the worst of both worlds.