Improved oil pump check valve for Harley Davidson

Fits 45c.i. Flathead engines (1937-1973), 74c.i. and 80c.i. Big Twin Flathead engines (1937-1948), and Panhead engines (1956-1965).

• HD.M.G.I. devised the solution to the problem of oil accumulation in the crankcase on engines manufactured before 2000.
  
• The steel ball does not always seal the oil pump feed hole, causing the oil tank to empty into the crankcase when the engine has been stopped for a while.
  
• The solution consists of a special ball made of FKM 70 ±5 Shore (Viton) material, which resists oil and temperatures from -25 to +230 degrees Celsius.
  
• The complete kit includes the ball, a special spring, and an aluminum adapter that fits between the spring and the ball.