Am thinking off putting 1 on my B however I bought the other type from rex count 3 years ago never had any trouble with it left the bike for 6 months fired up straight way I like the Elextrex is just got the 1 coil and cdi in 1 block that bolts to the original bracket. In saying that I have heard. A few say there no good I can't comment as I've never had 1