I've just checked my TPS sensor and it is indeed one of the faulty ones (starts with 31 on the serial number). How would I go about checking for "smooth tracking and the correct resistance, setting and voltage"?

And do you think it's still possible to get it replaced under the recall from Yamaha?

And thanks for taking the time to answer these questions, it's really appreciated!

Edit: Oh and BTW I don't have a plug wrench, but I will acquire one so I can have a look on my sparkplugs.

Edit2: And yeah the fuel is fresh and from a big gas station chain.