New to the Z125 world, but I have a 2017 KRT Edition Z125. Has about $3000 in retail accessories added on it, M4 Exhaust, PC5, New Rage Cycles Fender Eliminator with front and rear turn signals, driven aluminum handlebar kit, Domino grips, G2 Ergonomics quick turn throttle tube, Pathfinder led headlight, ASV levers, Driven TT rearsets, Woodcraft axle sliders, Piranha Engine sliders, and the list goes on. When I installed the Power Commander, the tech support at Dynojet said to go with the Yoshimura tune due to the fact they did not have a turn for a M4 Exhaust. I was wondering if anyone has every done an Autotune on these and if they had to put a 18mm bung on the exhaust, or if they went against what Dynojet recommends by using a 12mm to 18mm adapter. With the current tune the bike seems to lean out between 7k-10k rpms. Any input would be appreciated!