In 1969 I bought a BSA Rocket 3 for my regular transport and mid week bracket drag racing. The BSA would turn about 14.0 in the quarter with me (225lbs) on board. Perhaps the abuse was a part of it but I became very familiar with the internals and was known by first name at most the BSA dealers in the area. Not very encouraging. I bought a new 1970 Commando to replace the BSA. The Commando didn't make it home from the dealer on 2 tries and at the end of the 4 month guarantee period had only 26 miles showing! The BSA made 10,000 miles before I traded it in but the Norton struggled to make 9000, using oil at the rate of 1 quart per 600 miles from the start and through 2 dealer attempts to stem the flow (now know about shallow oil rings/split piston issues with early Commandos). 1n 1973 I bought a H2 Kawasaki and raced it every Wednesday and rode it everywhere. At 36,500 miles in 1.5 years it was dead reliable. I read that Norton was going to close so sold the Kaw and bought a new 1974 Commando left over at the Jam Buster Sale NVT put on. Alas that bike dropped a valve through the piston in the first week and the dealer refused to work on it. That launched me into a lifetime in the British motorcycle business but I was able to repair that bike on my own and still have it. It has 135,000 miles on now and here is what has been done: 800 miles-replaced head, pistons, valves 35,000 miles- honed cylinder to fit "high range" pistons to replace OE "low range" . 55,000 miles Bored +.020 and new exhaust valves. 78,000 miles- new rings and replace burned out tail lamp bulb. 100,000 miles- replaced rod bearing( copper just showing) and exhaust valves again. 125,000 miles- rings again and Mk3 engine mounts. Bike still has original electrics throughout, including headlamp bulb. No one has ever ridden that bike but me and it has never been raced but treated with respect. I have owned a number of both bikes and have 3 Tridents now and all have less than 10,000 miles. A well set up Commando will cover huge miles whereas a Trident is not likely to. Tridents are great fun to ride but for the long hall make mine a Norton. I have owned mine for 41 years.