Just finished the install of my 183cc big bore kit, TB performance crank, and oil cooler! Just waiting on my ECU to come back from tuning, and for my speedoDRD, Koso mini
FINBRO Honda Grom Big bore Kit - Low Prices, big Bore Kit
2022 Honda Grom DHM 149CC Big Bore Kit Top Speed Runs! - YouTube
170cc BIG BORE WITH 4V HEAD KIT | for Honda Grom® and Monkey® - KOSO North America