4/8/12/16PCS Spark Advancer Springs ATC 200E 200ES 200M 200X 200S 185S For Honda ATC110 ATC 110/125185/200 series 3 1979 - 1985 New / NOS - Pulse Generator Spark Advancer Springs This is for OEM FOR Honda parts for your 110/125185/200 series 3 Wheeler or 4 Wheeler. Item is sold in pairs of two. Fitment: Nearly every Honda machine with a Pulse Generator Assembly that physically advances the spark timing. I have added several to the compatible list above, but I'm sure there are some I'm missing. Spring is 13/16 inches (20.5mm) long at rest (not stretched) measured end to end. Compatible list I believe is accurate, please check the length of your springs before ordering. Note: I'm aware of one model that these do not work on (1972 CB200). This engine uses points ignition instead of a pulse generator. If your machine has points instead of CDI, there is a good chance these springs will not work.