I did a few upgrades to my grom...exhaust, 186 BB kit, intake..& my grom was running like 💩! I contacted DHMotoring, they recommended a better cam, pcx150 injector, and a custom ecu tune from them. Mailed them my ecu & 4 days later everything came in the mail...I got everything installed and now my grom is a growling fire spitting beast! Thank you so much DHMotoring!!! Yall are awesome!