1973 Norton 850 Commando

6mm Stem Valves with oversized heads

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How Chris achieve the numbers on the dyno sheet:  Custom designed 6mm stem valves with oversized heads, extensive port work, Keihin FCR carburetors, Chris’s hand built exhaust system, upgraded ignition, increased compression (11.0:1) altered cam timing and precise tuning. The results are, 59 peak hp @ 6500 rpm accompanied by 54 ft. lbs. torque @ 5200 rpm. Available exclusively at MotoCancelli.com.

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