Revington TR information: TR4A Aluminium flywheel for increased engine response and reliability. Superbly machined with steel clutch face, these weigh 4.2kg + 1.4kg ring gear. (Standard TR4 is 13.4kg including ring gear and early TR2 is 10.2kg)
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Revington TR information: Steel TR4A flywheel to suit 8 ½" clutch. Not available new. Use exchange part 143105EX, second hand part 143105SH or new aluminium part RTR1011