4 stroke
Yes it is a 2 stroke dirt bike manufactured by Kawasaki.
Both nice bikes but the kx100 without a doubt. the kx is a 2 stroke motocross bike designed for racing. A xr100r is a four stroke trail bike with much less power.
2
i say that a 4 stroke is faster than a 2 stroke
The yz would always win because its a 2 stroke race bike. Even the yz85 would beat the crf150r or the crf150f.
A YZ250 is much faster than a CRF250r. The YZ250 is a 2 stroke where as the CRF250r is a four stroke.
The 2 stroke will be faster because of differences in Waite but more polluting be it oil mixed with fuel
Oil is a lubricant. 2 stroke oil is designed to be mixed with gasoline and in that form it lubricates the engine. 4 stroke oil lubricates the engine but is not burned as 2 stroke oil is. This has nothing to do with speed. So, the answer to your question is neither is faster as they are just lubricants.
For the same engine size, it should be.
Be a druid. Swim like a seal.
it runs faster than a 4stroke but use mixed gas in the to stroke