[JerryHawk250]

Originally Posted by metricmotoguy

So I got definitive answer on the OEM spark plug. It is a Torch D8TC, or D8RTC for the resistor option. The NGK direct equivalent is D8EA (#2120), or DR8EA (#7162) for a resistor plug. The gap should be 0.6mm-0.7mm.

NGK DPR8EA-9 (#4929), or the iridium version of that plug DPR8EIX-9 (#2202), is an incorrect application. The longer reach and wider gap are outside of spec.

Best advice is to use the recommended plug or its direct equivalent and change it every year. Many people are misled by iridium and the benefits of a premium plug. There is no real performance gain with a premium plug in such a low-tech, low-performing vehicle. Any time you change your spark plug the ride will feel better. Upgrading from Torch to NGK is enough to make a difference. In the long run your bike will be better off. A single DR8EA is less than $4.

I hope this helps someone else.

Well don't tell any of my bikes, I've been running that plug on my Hawk since 2016. Still the same plug with not a single issue. It burns nice and clean. I've ran the same plug on all my other China bikes and so have many others.