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Triumph is not the only company using this method. These motors have proven to be good for 100K just the way they come from the factory, I bet very few bikes ever reach 100K in their lifetime. Look at the low value of used America's, You can get a used low mileage bike for 3K,much like the rest of the metric bikes they are simply not worth rebuilding.



I beg to differ, I have 21 bikes and most are 1954 through 1972. My 66 TR6C has at least 3 times that on it, probably more. My 54 T110 also has at least twice that on it as does my 58 T110. They have had multiple rebuilds but no major components such as heads have been replaced.

Now that I think of it, I lied, the 58 had the head replaced long ago due to an inherent defect in those old aluminum 8 bolt heads. They didn't change the design when they went from iron heads to aluminum and the valve seats were too close to the head bolts and they cracked. The later 9 bolt heads fit and that has been done on that bike.

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