The stock Mikuni on my 2022 SSR125TR came with a 95 main jet and 1.5 pilot. After 15 hours on the meter and 3 months of sitting the bike was bogging and losing power at the top of the RPM range. No amount of adjusting fuel and idle screw fixed it. Even taking the carb apart and cleaning every piece of it didn't help. Bought this kit and swapped in a 100 main jet and 1.75 pilot and immediately had a brand new bike. I've never spent so little time on a job and had such a huge impact on performance. The SSR125TR is supposed to come stock with 8.5 hp and I would bet that it has 10 or more with the new jets. If you have a VM22 carb on any small engine get this kit and go up from the stock jets. You will not be disappointed.