I have used 2 sets of 4's and 3 sets of 5's on 2 of my bikes. Ive 5k km on a set of 6's and can honestly say they are wearing better than previous tyres. The wet weather grip is as good, I've never had a slide on the any Michelin tyre so I think they are grippirler than I will ever need. They do...
If it's a faired bike there is also an earth connection behind the clocks. It's a 6mm bolt with an eyelet holding the earth wire. Worth checking. The connector block on the right side is the usual culprit though.
I replaced my chain and sprockets last year. I had the same noise. Turns out I used a plain front sprocket. I changed it to a rubber sided "silent Sprocket" noise gone.
What you're experiencing is the dreaded Yamaha fuel cut. Roll off the throttle above 5k rpm and the fuel is cut to the injectors. Roll on the throttle again and there's nothing for a second then you have power. It's a horrible thing for sure and only a remap of the ECU will cure it. TPS...
I had a similar problem to yours, no fault code would ever appear when my bike had its issue. after a while a cylinder would drop out if I blipped the throttle, it was just one cylinder doing it but all of them at various times, I changed the coils, plugs, TPS, removed the throttle bodies and...