TRz and TR3

” four big-ends failed within a month of purchase (50,000 miles, 2 owners). Crank, mains, big-ends replaced completely ,free of charge by dealer.”

” Big-ends went on the M — 49,000! “

” Rlew up on Autobahn at 65,000 miles. Excellent rebuilding job by Frankfurt Diumph concessionaires. Engine replaced by new unit at 70,000 miles.” “

Would seem to run indefinitely With Very little loss of efficiency.”

” One exhaust valve at 85,00o miles, another at t 51,000. Rocker shaft securing bolt at 142,000. Engine checked for wear at 109,000 and 151,000 miles — very little apparent. No replacements required.”