Had a YSS on an old bike and it was sound. No experience of the others I'm afraid

You can also get studs in 2 sizes. I.e M10 at one end and m8 at the other. Might be worth having a look at those

https://rover.ebay.com/rover/0/0/0?mpre=https%3A%2F%2Fwww.ebay.co.uk%2Fulk%2Fitm%2F283442339692

@NINJA I think my trailtech kit cost me around 130, how much is a replacement from Yamaha?

I'd go aftermarket - I can recommend the trailtech vapor

+1 on the vacuum kits.

I've only just got one and now I'm wondering how I got on for so long without one lol