Honestly, unless you are very short and rail thin, the stock mirrors are best used as trading fodder. Long stem mirrors are not that expensive, especially if you can tolerate "craptastic", meaning Emgo. Black stem, black round heads. You need the 10mm version, non-Yamaha (because Yamaha was smart and has one mirror reverse threaded so wind pressure doesn't move it, unlike the other metric Big 3).
Something like these on my Vulcan 800A work great, and the set should run about $20. Look like something the cat yakked up, but...
Still miss that bike. Handled like the Savage, launched like a 41 Willys gasser...