The what if question is because I like the condition and configuration of my bike. I’d rather fix or replace the engine than the whole bike if/when the engine needs serious work. Heck, if a reasonable King’s ransom will effectively reset the engine’s life clock, why not? But back to the original question, what data is out there on this?
For cop bikes, they are usually left running a lot - almost all day long - every day, so odometer miles isn’t an accurate accounting of use. When I was in the hunt for an STP, motor officers warned me away from mileage over 100K, those that knocked (possible top end work), leaked, smoked, weak alternator, didn’t ride and brake smooth, and of course damage and missing parts.
And yes, I’ve heard the great stories of the ST’s longevity which is why buying one over 50k miles was viable, something I’d never do with a cager. I’ve seen these engines for sale (assuming you can trust the stated mileage and condition are valid) which got me thinking as if a rebuild or replacement is a better path than buying another bike and starting all over with its issues and modding it.
Real experience like Bertrand’s is the kind of feedback I was hoping for. I suspected it would be in that ballpark, maybe over $1k if done at a Service Center. The Fleabay engines compatible for my bike are in the $500-800 range, which is about the same cost as the rebuild, plus you have to factor in shipping and the swap labor (and assuming the used engine is good and don’t have to do it all over again). Not being someone with the time and place or skills to replace an engine, I’m thinking the rebuild is the way to go.