KTM 350 XC-F (2019)

This cover is tough, fits very well and doesn't interfere with shifting in any way. However, the supplied hardware is poor, with one bolt snapping off despite using a quality 1/4" torque wrench at the factory recommended setting (10Nm). I ditched this hardware, instead installing the ignition cover with much better quality graded hardware found at my local Ace Hardware. With the frustration of having to pull the factory ignition cover off to get the snapped bolt out of the case, I'm happy with how this mod turned out.

I replaced the stock Twin Air with this ProLine Air Filter by Funnelweb. One key difference is that the Twin Air doesn't use a rubber grommet in the center of the filter and KTM air filter cages are notoriously pointy. Some have reported that the cage has worked its way through the Twin Air filter causing a hole. In contrast, the Funnelweb filter has a robust rubber grommet that completely eliminates this problem.

The curiously shaped cones on the Funnelwb filter are designed to greatly increase the surface area of the filter (as much as double) without increasing its overall size. This design allows for greater dust holding capacity while still maintaining filtering efficiency and performance.

The filter appears to be well built and it fits the stock KTM filter cage and airbox  accurately.

Bike manufacturers put a lot of R&D time into designing frames with specific levels of flex and rigidity in order to achieve a certain feel and handling. Because of this, it would stand to reason that the more rigid the skid plate material and the more rigid its mounted, the greater its impact on engineered frame flex (stiffer). Now, I don't have the knowledge & skill to prove the real world affects of aluminum vs. High Density Polyethylene (HDPE) on frame flex, but I do know that this AXP Xtreme skid plate is a fair bike less rigid than aluminum, so the end results is a frame that flexes more closely to how it was designed. 

Installation
Some assembly required (front cross-member, rear spacer & linkage guard plate) but very easy and quick. Instructions are included, but its easy to figure out by looking at the pictures and a visual overview of the parts & hardware. The plate needs to come off for oil changes, but it's just two easy to access bolts.