this post was submitted on 21 Jul 2025
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Page title says it's a drag racer, so I took the liberty of making the following guesses:
All of this is just guessing. I have no first-hand experience with drag racing drivetrains, motorcycle or otherwise. I do seem to recall learning that there are automotive drag racing transmissions in which the clutches weld themselves closed during the race and need to be rebuilt between runs.
Ew! Your speculations sound based on reason and research! I, on the other hand, was relying on pure stupidity.
Personal anecdote about welding clutches: turns out it's really easy to do! The clutch pedal fork in my '95 4Runner broke, so I ended up getting my entire clutch system replaced/rebuilt. As part of the rebuild, my mechanic's parts supplier offered a deep discount on a racing clutch they recently started manufacturing. Somehow, this clutch sat incorrectly in the housing and presented a partial gap of a few micrometers, which the supplier assured us would be negligible within a few days. A couple of weeks later, I was running errands all day and suddenly smelled and heard something awful and couldn't depress my clutch pedal, even when trying to stand on it. That was a fun day of abusing my clutch start override every time I stopped and wasn't on a decline or had to change between forward and reverse!