I have 2012 KTM Duke 125 at 10 000 miles (16k kilometers). I am the third owner of bike for 2 years. Whenever i twist the throttle fastly, motorcycle is chocked up. So i thought the problem could be in spark plug since i assume it has never changed.
I searched eBay and found there are 2 proper spark plugs that i can buy. One of them is copper and looks like secure option. Other one is Laser Iridium Spark Plug which looks like hi-tech.
I have also bought K&N air filter, so that mixture should have more air.
My Question is which one should i go? Please tell me which is safier or more performance?