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900 Standard PM 1800 / PM 1810 / PM 1903**/ PM 1913**
625• Valve Angle: 26° AND 4° INTAKE
engine volumetric efficiency
18 SP X 244cc 68 cc 2
Steel pins were machined from solid 8620 bar stock
Extreme Racing American Chromoly 1.200/.750 7 Degree 11/32 Steel Retainers 900 Standard PM 1800 /CALL SHANON AT 507 445 3235 WITH ANY QUESTIONS. New valve springs with larger diameters require new retainers to handle the higher pressures developed by the springs. Extreme Racing steel retainers are the solution. Precision machined from heat treated 4140 chromoly and finished in black oxide, these retainers are specifically designed for positive location when combined with appropriate valve springs. 1. 2" O. D. . 75" I. D. 7 Degree 11 32 Outside
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