Very nice! Creative and well executed, but I agree with 71M; I think I would like to see it without the upper portion of the crankcase, and with a little more 'breathing room' above the filler cap. A tight crop of just the rocker-arm covers and carbs might work too. If you have an opportunity to reshoot this, consider a larger aperture for less DoF; the background is just a bit more focused than might be ideal.