1975 Norton Commando Mk3 restoration Part 16, Installing a Tri-spark ignition system
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1975 Norton Commando Mk3 restoration Part 17, The big reveal, Finishing the Mk3 restoration
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Norton Commando 750 Restoration Video #21
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Norton Commando Tri-Spark Ignition Part 1
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Boyer 101
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1971 Norton commando static timing
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Irish Rock Playlist
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1974 Triumph Trident restoration Part 11, Installing a Tri-Spark ignition system
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