They don't even have 2021 MT09 listed as a motorcycle in their database, so you are either making up things or your information about timings are totally off mateHi my 2021 sp is about to go to Lextek in Exeter in England as a development bike on Monday 2nd of August, they will have it 5 days at which point there will be an exhaust available for the new mt from them, Woolwich racing are currently cracking the ECU, I will ask Lextek to put the standard exhaust back on my bike until the ECU is cracked as I don't want a poor running bike, at the moment it's great and if you cruise on it it's excellent on fuel 57 miles per UK gallon or 46.5 per us gallon, if I cane it I still get 45, that's really giving it stick. I have 3100 miles on it bought it 1st of may, absolutely love it fantastic bike, I live in Dorset southern England which is all country twisty roads, it's perfect, I find the handling is superb, my brother has the standard bike in tech black and quite frankly that handles really well as well and for the money is a bargain. I considered KTM but I wanted Yamaha reliability and that beautiful cross plane crank triple, it's just got torque everywhere. I have a Ducati multistrada as well which I just don't ride anymore as it's horrible to ride in comparison to the mt09, it's a joy to hoon down country roads on and flick through the corners or just cruise and short shift in to top. So Lextek will have an exhaust available very soon probably exiting underneath the right peg.