On the Surpass I
The High speed needle valve is on one side of the carb and the low speed is on the opposite side in the center of the throttle arm.
Has a silver valve cover
Throttle arm is steel
Has a breather spud out the bottom of the crankcase
Intake manifold comes down left corner of crankcase. The intake manifold bolts on the head are horizontal.

On the Surpass II
Both the high speed and low speed needle valves are on the opposite side of the throttle arm
Throttle arm is small and plastic
Intake manifold bolts are at a 45 degree angle
Carb sets in the middle of the rear.
Valve cover is black
Has crankcase vented into intake manifold
The crankshaft is cross drilled right behind the cam gear fro oil to get to front area of engine.
Internal steel parts are cadmium plated to prevent rust
Glow plug is recessed 2mm farther down into head. The relieved part of the glow plug protrudes completely into the combustion chamber.