Hi all, As posted before, I am looking for a bike to learn the ropes of off-road riding. I do not want to open a debate on the topic, but although I would really like a two-stroke, a four-stroke would be more practical for me, for several reasons. I know that ''traditionally'', four-strokes engines were very reliable, low-maintenance and low-cost to own/operate (ie: XR's, etc.). Despite the different opinions on the topic, it seems that this has somewhat disappeared with the arrival of the ultra-high performance 4-stroke thumpers (ie: CFR450 and the likes). When I say ''it has disappeared'', it refers to the low maintenance and cost of ownership. From what I hear/read, it is really costly to rebuild a 4-stroke engine, compared to a 2-stroke, and the requirement to do so may happen quite frequently (Most used HP 4 stroke ads indicate that the engine has been rebuilt, which is scary to me given the cost to do so). Anyway, long story short, I could used your input and direction towards models that are not dinosaurs but rather modern, and that would be really fun to ride without the worry that a costly re-built is to come. As an example, I guess the YZ450F would be considered one of the ultra-high performance (and potentially maintenance/cost intensive) models. Does the same apply to the WR450F? Same with Honda. CRF250 = HP 4-stroke, does the same apply to the CRF250L? Thanking you in advance.