You’re probably already aware of New Jersey-based MachineArtMoto’s ingeniously designed convertible handguards and svelte valve cover armor, but you may not know about another highly effective piece of kit they offer, the MudSling.
Similar in concept to the extensions available for front fenders to increase protection from debris thrown up by the front tire, the MudSling creates a barrier between rear suspension components and the rear tire. On BMWs equipped with ESA, this extra shroud protects not only the Paralever and shock absorber, but also the black box full of related circuitry. This decreases the likelihood of damage, along with the amount of grime a meticulous owner must clean off parts that are often awkward to access. It also reduces the spray reaching the backs of the rider’s legs. The MudSling provides additional coverage from the lower edge of the existing inner rear fender down to below the swingarm on modern R bikes – 900, 1200, 1250 and 1300cc (R 1300 GS only; a GSA version is scheduled for release in early 2026). GS/GSA owners should review information on MachineArtMoto’s website to see if the MudSling might not be compatible with their choice of tires or panniers because of narrow clearances.
Installation on a 1200/1250cc R-bike (R 1250 RS shown above) is quick and easy. It makes use of a central stud extending through the stock fender, which is rendered a female fastener with the addition of a coupling hex nut. A cap screw then passes through the MudSling and into this threaded receptacle. The outer/upper edges of the MudSling get secured to nearby subframe rails with two inconspicuous zip-ties on each side. That’s it! The process is slightly different on 900 and 1300cc machines, but equally straightforward. A savvy observer will notice the MudSling’s presence, but it calls no attention to itself and looks like the factory put it there. Actually, it seems odd the factory didn’t. Why leave a big gap for that pricey shock and spring to get chipped by stone fragments and coated with gritty gunk whenever rain or puddles are encountered?
For $103-$119 (depending on application), you can remedy the lack of OEM protection. Made of very sturdy black polypropylene with a texture that blends right in with the stock plastic, the MudSling is elegantly simple and delivers a valuable service for a modest price and just a few minutes of labor. The effort saved during cleaning alone justifies purchase, but it’s also cheap insurance against what could be much more costly damage, whether resulting from an acute impact or the accelerated wear associated with chronic exposure to moisture and fine particulate matter.
Note: In the photo, I’ve removed the muffler and right passenger footpeg hanger to more fully show the MudSling in place, but their removal isn’t part of the installation process.
Ed. Note: MAM offers bundles for most GS bikes; you can get a discount when buying the Mudsling for the rear and the Avant for the front at the same time.
