TB Parts "Red Box" Improves throttle response and increases the rev limit. It's an inexpensive and simple to install performance option for the Honda 50/70 big bores or standard bore. Just simply remove your stock CDI and install our performance one and your set!

For: 88-99 Z50R, XR50, CRF50, XR70, CRF70 - 12v Horizontal Honda Engines

Also -1991-1994 Honda CT70