Hi Ian,
From another time & a different 2-wheeler: in 1989/90, as we were settling back into Ottawa after 6-plus years in Southern/Central Africa, I bought a very nice'n'tidy 600cc single-cylinder Yamaha road bike (rather unimaginatively named the SRX 600.)
I learned, however, that if one had to remove the rear wheel, it would have been a very complicated task, entailing dismantling most of the rear half of the bike. As a precaution, I injected a healthy dose of Slime. Nothing ever went wrong -- no flats -- so perhaps the Slime had an effective prophylactic function?
Then again maybe it was superfluous, as in all my 50-plus years riding motorcycles in N America and Africa, I never had a flat. So -- I'll never know, but the Slime didn't hurt.
Take that, umm, FWIW, and good luck!