The spark plug is a crucial component of the AJS TN12 125's ignition system. It ignites the fuel-air mixture in the engine, enabling smooth starting and running. Regular maintenance ensures optimal performance and fuel efficiency for your TN12 125 If your bike is running rough or losing power, it's essential to inspect and replace the spark plugs.
After a bit of research and contacting NGKs tech help department, I thought I'd fit an Iridium plug to my bike and squeeze out a little bit more power from my 400cc single (as I had done with my previous 500 twin). Straight away the tick over has gone up slightly showing better combustion and the rides slightly smoother too!