1950 Harley WR (Rebuilt)

These WR engines are rare.  The only way to buy one was through a dealer(of coarse) and you had to have a racing license.  Class C via AMA, American Motorcycle Association. 

This is a 1950. 

Special features (different from standard WL/45" engines include:

Sprocket Shaft (special for ball bearing)

Pinion Shaft w/oil groove (special for ball bearing)

Crank Pin (special size for WR rollers)

Drilled Connecting Rods

Special Lightened Flywheels

Special Cams (for WR only)

Special Ball Bearing Idler Gear and Spacer

Special Gear Cover for Ball Bearings and Wico

Ball bearings on #3 and #4 cams(both ends)

Ball bearings on #1 and #2 cams (case end only)

Special Angled Tappet Blocks

Flat Show Angled Tappets

Special Tappet Covers

Right Case (special casting for magneto idler gear stud)

Left and Right Case with special machining for Ball Bearings

Right Case machined and drilled for Wico/Edison Magneto

Special Cast Iron Cylinders with larger cooling fins, larger valves,

smoothed ports, and special valve angles...
Special Pop-Up Pistons (same as K, KH, KR)

Special Valve Springs

Special Cylinder Heads and Combustion Chamber 

No Head Gaskets !

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...and it all must be hand-fitted, must spin free, no binding with correct race

clearances and tolerances for high speed race situations...