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Mr. lowmass, I do not own, nor will I likely ever own a Triumph MX scooter. Having said that, I am mightily impressed by your knowledge, and willingness to break down the likely scenario that will put a better performing motorbike than what the factory delivers in your garage. Seems to me that the average gearhead dirt bike owner could follow these detailed directions and have a good outcome. Thank you Sir !

Very good analysis and explanation. Will be interesting to see if you have solved all the issues with your detailed work. This just reinforces my own conclusion that this is unacceptable for a five-figure racing motorcycle. As said, other manufacturers have figured out how to spec, manufacture and finish a motorcycle transmission. Triumph does not seem there yet, and it's a little surprising that a paying customer has figured out the problem and solution and not the manufacturer's engineers.

This goes along with what lowmass is saying that it's not a design issue, but a quality control issue. Some bikes may be fine, others not so much. On the shootouts, listening to pulp about what KTM made them do to the shootout bikes makes me doubt some of the results. They would tear down engines and polish ports, deck cylinders, ect. You think triumph wouldn't go through the bikes to make sure the magazines got bikes that shifted well?

This has become the ultimate "don't buy a triumph" thread 😂. Lowmass should be expecting a call from RC to tell him to cease and desist or factory triumph offering him a job if he deletes this... Does the cross-country model have these issues? I haven't heard much about it.

Good luck. You're on a helluva journey with this issue.

Great info. Thank you.