For some, the carburetor on the 450 will come as a surprise. As every other 450 MX bike is now fuel injected, it seems out of place that KTM sticks to jets. According to KTM, there were a few main reasons to stick with the carb. One big one was cost. The addition of EFI on this bike will bump up the price. Another is weight. KTM hates adding weight to bikes unless it's worth it in improved performance. Lastly is performance. Apparently, every tester in KTM's camp preferred the power delivery of the carbureted bike. Guess what that means: the 450 SX-F has a carburetor for 2011 but there is at least one in the testing fleet that has EFI so the transition can't be too far off. We'd guess the 450 will get a major motor update soon with EFI included.The linkage shock system on the 450 seems to only help the calmness of the ride and should make track-to-track changes less drastic. KTM's have always been highly sensitive to ride-height, fork height, etc. The linkage may give them more middle ground for a range of settings to work across different tracks.