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Footnotes to Triumph Overhaul Manual

1 The Overhaul Manual says that E9525 connecting rods were introduced in 1967 at DU47006, but Nelson says they were introduced in June of 1969 (Nelson, J.R. Bonnie The Development History of the Triumph Bonneville. p.188, 2nd ed. 1994. Foulis/Haynes). See The Bonnie Ref.

2 The Overhaul Manual refers to the crankcase parting tool as Triumph special tool Z151. However, all the sources I can find say that Z151 is a "universal sprocket puller" for removing the engine sprocket.

3 The Overhaul Manual (1967) says that ring end gap should be .010" to .017". However, Triumph Service Bulletin (Twin)11/71 updated ring end gap to 0.012" - 0.018" in 1971. (Also see: "Ring Gap" in The Bonnie Ref.

4 The Overhaul Manual says to torque the headbolts to 20/25 lb.ft., but the WS Manual in General Data, Torque Wrench Settings gives the correct figures of 15/18 lb.ft. (See: "Head Bolt Torque" in The Bonnie Ref).

5 The Overhaul Manual says to adjust valve clearance to .004" intake and .006" exhaust, but the WS Manual in General Data, gives the correct figures of .002" inlet and .004" exhaust.

6 The Overhaul Manual says to gap the spark plugs to .020", but the WS Manual in General Data, gives the correct gap of .025".

7 The three variations of this tool are the subject of a portion of Triumph Bulletin No.66-2P. The pertinent portion is here on TED.