Installing handguards is one of the easiest mods you can do to your bike and the protection they offer should make their installation a priority. If you can tackle the most basic maintenance on your bike, like changing oil, brake pads, etc., you’ll have no problems with this. In this case I installed Acerbis Rally Pro hanguards with universal mounting kit on a 2008 Yamaha WR450F. The mounting kit includes support arms, inserts, liners of various thicknesses, spacers, rubber tubes and all the necessary bolts. The Pro Taper handlebar on my bike was a perfect diameter that didn’t require me to use any of the liners, spacers or rubber tubes. Here’s a photo of the parts left over after the job was completed along with some tools I used in the process. Start by holding up the handguards to your bike, on both sides, envisioning how they will sit once mounted. Once it looks like it can actually work and you’ve worked up enough courage, start by opening up a hole in one of your grips. Here I started with the throttle side, but it shouldn’t matter what side you start with. I used a utility and an Exacto knives to cut out the hole. If the opening in the plastic throttle tube is not big enough for the insert to pass through, use a large drill bit or a round hand file to open it up. Test fit the insert often until it goes in somewhat easily. I found that on my inserts the expansion segments were butting up against the conical expansion nut and so I prepped the insert with a few turns of the screw until I could see expansion segments go over the expansion nut. Attach the insert to the handguard and push the insert into the handlebar as far as it will go while still allowing the throttle the freedom of movement to close under the power of the return spring. Test the throttle to make sure it closes by itself with the handguard up against it. For finishing touches here I added a little of lithium grease, just to eliminate all rubbing. With the handguard in place test fit a support arm. The support arm can be mounted in either high or low position. I mounted mine in the low position to pass under the wires and cables. Just try different combinations until you find the comfortable position. As I already mentioned, the thickness of my Pro Taper bar allowed me to mount the support arms without using any of the liners that come with the kit, but if your bar is thinner, you may need to use liners if they come in your mounting kit. Put all the bolts in and snug them all an equal amount. Play with the positioning of the handguards until you find the perfect position. Tighten all the bolts a little at a time each and keep going from bolt to bolt until all are tight. This will result in equal force and tension among all the bolts. Tip, I recommend a drop of blue Loctite on all bolts just to be safe . The left side at first glance appeared like it would butt up against the brake line guide, but it didn’t. It fits just fine. All done.