07-11-18, 07:16 PM
There's a very cheap one. It looks the same to me but you could ask the seller before you buy it
https://www.ebay.co.uk/itm/Yamaha-SR-125...rk:16:pf:0
Are you 100% sure the coil is the problem? What tests did you do and what results did you get? Did you confirm there's power and ground going to the primary side of the coil? I'm not sure how the SR125 system works I don't have the wiring diagram but on the bikes I've seen that have two wires going to the primary side of the coil, one of the wires is constant 12V and the other is a switched ground that's switched on and off by the computer. You can check if the computer is providing a switched ground by connecting a Led test light from battery positive to the switched ground wire. If all is good the Led should flicker on and off as you crank the engine. Next test for constant 12V on the other wire by connecting the test light between battery ground and the constant 12V wire. The test light should stay on. If you've got constant 12V and switched ground and still no spark the problem is the coil, ht lead or spark plug. As I said though I'm not 100% sure that's how the SR125 works since I don't have the specific wiring diagram.
https://www.ebay.co.uk/itm/Yamaha-SR-125...rk:16:pf:0
Are you 100% sure the coil is the problem? What tests did you do and what results did you get? Did you confirm there's power and ground going to the primary side of the coil? I'm not sure how the SR125 system works I don't have the wiring diagram but on the bikes I've seen that have two wires going to the primary side of the coil, one of the wires is constant 12V and the other is a switched ground that's switched on and off by the computer. You can check if the computer is providing a switched ground by connecting a Led test light from battery positive to the switched ground wire. If all is good the Led should flicker on and off as you crank the engine. Next test for constant 12V on the other wire by connecting the test light between battery ground and the constant 12V wire. The test light should stay on. If you've got constant 12V and switched ground and still no spark the problem is the coil, ht lead or spark plug. As I said though I'm not 100% sure that's how the SR125 works since I don't have the specific wiring diagram.