Fabricating sturdy fender mounts can be a bit of the hassle for the professional motorcycle builder and home-builder alike. Here at Lowbrow we decided to create a few options to help make mounting your rear fender an easier task. In this article we will show you how Andy at Pangea Speed used our upper fender mount tab to mount his ribbed rear fender with ease. In addition to Lowbrow Customs Stingray and Manta Ray fenders, this bracket is also a perfect fit for the Gasbox fender. We also make an upper fender mount for flat and trailer fenders as well.
When preparing to mount your fender, be sure that your wheel is moved forward in the axle adjuster slots as far as it goes! This will ensure your tire can never hit your fender, regardless of how you adjust the chain tension.
To ensure you keep proper and even spacing when mounting your fender, it is useful to tape some cardboard to your tire. Other methods include using a piece of old hose for this same method. You can really use anything so long as it is the proper thickness to give you the offset you would like the fender to have from the tire.
With the fender in place, ensure it is sitting fully against the spacers you put on your tire. Keeping this snug will keep the fender positioned properly so it radiuses your tire properly.
The fender mounting bracket can be welded underneath your seat cross-tube, on top of it, or butt right up against it, however works best for your particular frame, wheel size and fender combination. In this photo, Andy has clamped the bracket in place, with the bungs firmly against the fender. He is making a cut line with a marker so he knows where to cut the fender bracket using his grinder cut off wheel.
The mounting bracket marked and ready to cut.
Having cut the bracket and deburred the edges, it is ready to weld the fender mounting bracket to the motorcycle frame, and tack the threaded bungs to the fender.
Here you can see that the fender mounting bracket and the threaded bungs are tacked in place. Be sure to make multiple, strong tack welds to hold everything securely. You can then unbolt the bolts from the mounting bracket and finish weld the bungs to your fender, and finish weld the mounting tab to your frame. That is one more task done, and one step closer to being on the road! To support the bottom of the fender you could use a Lowbrow weld-on lower fender mounting tab, and for the rear of the fender you could consider a DIY Fender Strut Kit, or one of the various DIY Sissy Bar Kits available from The Gasbox and The Haifley Bros.