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Long back crank


Andy Borris

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TR5, TR250 and early TR6 up to engine number CP50,000. Long back crank and shallow flywheel
Back of crankshaft measures 44mm Recess in the clutch face of the flywheel is 9mm deep
All TR6 after engine number CP50,001. Short back crank and deep flywheel
Back of crankshaft measures 28mm Recess in the clutch face of the flywheel is 25mm deep



http://www.revingtontr.com/shop/downloads/IS0035%20TR5-6%20crank%20identification.pdf

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Those cranks would all be cross drilled too, the crank in a mk1 pi is the same, confusingly that has a CR engine number like a later TR6 engine. Flywheels are a bit lighter too, although I don't suppose you have another flywheel to compare it with either!

Colin.

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