For handling and suspension, we'll talk about the bikes as a whole just because they share so many characteristics with a few exceptions. First of all, not only is the 450 harder to handling in super techy stuff because of the power, but the frame is longer by a few millimeters than all the other bikes. We asked Sherco about this and they said that a typical 450 customer would most likely be riding in more open, fast terrain and would benefit from more stability (just as a side note, if you haven't read it, the 125 SE-R two-stroke has a shorter frame for the opposite reason). Even so, all the Sherco SER-F bikes have a very slim, nimble feel. It is clear that Sherco puts a premium on agility above all other handling characteristics. At the seat and between the pegs, the bikes feel very thin and easy to flick around. They don't feel long and even though we didn't have time to set the sag for each bike (more than a dozen different editors), our 215-pound tester didn't feel too chopper-ed out or even unbalanced, really. The SEF-Rs are quick turning and respond to minimal rider input, though the two-strokes feel even more so. This is a great characteristic for slicing through tree trunks and twisty grass tracks, but we are dying to get the bikes to the US for faster paced riding. Quick-turning might just turn to twitchy and unstable.