The HPI cdi for the Yamaha YZ125 is a 2 curve unit which you can change between the curves while riding via a handle bar switch,the unit come pre programmed with power improving igntion timing,you can purchase the programming equipment if you wish to re work the curves to suit your engine tuning,this is not normally required
High quality carbon cover to replace standard plastic ignition cover. Quick replacement Inlay GYTR logo for ever lasting looks Weight saving and stronger compared to original part 36 gram weight reduction Factory Racing
Heavy flywheel for better performance of the YZ125, part of the GYTR� YZ125 High Performance Kit
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