Plug for practice of NSRmini and NS50R
I use it for practice on my MINI 2-stroke Racer.
It is useful because it is less than half the price of B10EGV.
The difference of FeeRing from B10EGV is almost impossible to feel.
When it falls over and the carburetor froths and is quenched by Gasoline, it's all over. It will not come back to life after cleaning, the EGV will.

