Polini Hi-Speed Variator Kit for 50cc 2-Stroke Vertical Air-Cooled Honda, Kymco Scooters SPECIFICATIONS: Variator Ramp Plate Slides Variator Boss 16×13 Roller Weights in 5.6g and 6.9g 25 Degree Ramp Plate COMPATIBILITY: Honda – Dio ZX 50 2T Daelim – Cordi 50 2T A/C, Message 50 2T A/C, Tapo 50 2T Kymco – Curio 50 2T, DJ 50 2T, Fever 50 2T, KB 50 2T, Mxu 50, Mxer 50 2T, Maxxer 50 2T SYM – DD 50 2T, Fiddle 50 2T, Flash/Free 50 2T, Jet 50 2T, Mask 50 2T, Red Devil 50 2T Other Similar Models that use the VERTICAL engine The Polini Hi-Speed provides a link between noticeably better traction in the lower speed range and a higher top speed. This proven Variator is meticulously crafted and comes with 2 sets Vario mati (5.6 g and 6.9 g), 3 slides for Vario mati and open Vario mati. Please Note: These ship with a longer than stock drive face spacer. You may need to use electric start only or switch to a flat QMB139 style front drive face. **