Plug n’ Ride SKULL 

Harley-Davidson Riding Mode system. Breakthrough technology for performance upgrade. A skull-shaped dial, conveniently mounted next to the throttle, allows the rider to easily select 5 ride modes Rain, City, Road (factory or your actual bike default),
Sport, and Anarchy (racing). This simple plug-and-play solution utilizing Ride-by-Wire (RBW) technology is a serious performance upgrade providing the rider options for safety, comfort, and fun. RBW-SKULL works on all Harley models
from 2008 to 2023 with an electronic throttle. Compatible with all varieties of stock motorcycles, and all kinds of Harley performance engines. Stage II, Stage III, Stage IV, Engine kit 122, 131, 135. Compatible with all kinds of electronic tuning devices on the worldwide market. This is a Plug-and-Play system no programming or setup is necessary Five modes are pre-setThe five are fully customisable by you in 15 seconds with 20 different real maps