Aluminum vs steel subframe YZ250

Subframe would save you a couple pounds I’d imagine. No reason not to as it’s lighter and doesn’t need to be as strong as steel.

My 98 yz steel subframe would bend if you just looked at it wrong. Everytime I had a tip over instead of the handlebars I would be kicking the subframe to straighten it out. Aluminum subframes are much stronger with the added bonus of the weight savings.

There is always the Ti option as well.

not all aluminum is the same . two of the "strongest" ones are 7075 t6 and 7068 t6 . both of these are "stronger" in most aspects than 6060 t6, however, all aluminum bends/flexes in shear about the same irregardless of what grade it is, and about 66% easier than steel does. i am using 7068 aluminum for my rear axle and axle spacers and swingarm bolt on my 1980 yz250.