My bike has evolved over the year I’ve owned it. Fenders are no exception to my constant search for just the ‘right one’ for me. So here’s how it’s gone and I believe that I’m now satisfied with the fenders from a protection and aesthetics standpoint…..we’ll see! LOL

I had never been a fan of the “fenderett” of a rear fender on the Sur Ron. Not only did it not provide much splash protection, but in terms of aesthetics, it just appears truncated on the bike. So through some research I found that a Honda CRF70 body kit off of eBay would provide me with a rear fender and inner fender more suited to my bike and my taste. And for 21.00 it’s a bargain at that! So with a little measuring and my handy Dremel tool I adapted the rear fender to the Sur Ron and modified the Honda front MX fender to use as a rear sub fender. The one I had fabricated before was too narrow for the new Shinko tire.

All of the body panels for the CRF70 came in the kit. I only used the front and rear fenders.
As you can see the rear sub fender is made from the Honda’s front fender. I simply cut it to size and fabricated braces to hold it onto the swingarm.
I cut the CRF70’s front fender to make the inner fender for the Sur Ron

A visitor asked me how I mounted the rear sub fender. This is how I did it. I simply made two brackets and attached them to the swing arm bosses.

The new rear fender is much wider and offers real protection from water and mud. Plus I like the aesthetics of the look much more than the silly stock ‘fenderett.’ LOL

I have always wanted my bike to appear as non motorcycle as possible. And I try my best to not ride in heavy mud. As such my preference for a front fender is one much like those who ride in trials use, close fitting to the tire. I have switched to inverted forks so I looked to my old road racing bike to see how to mount my fender. Mounting my MudHugger to the stanchion fork guards was the way to go. And having the fender close to the tire really works well to prevent rocks and water from coming up toward my face.

Mounting the fender to the fork stanchion protection guards works well.

As of July 2019 this is my ‘current‘ fender configuration. The front is a MudHugger and the rear and rear sub fenders are from my modified Honda CRF70s. Keep in mind I now avoid riding in heavy mud or on trails where there are tons of sticks. The front fender could not handle those types of terrain.

Prior Fender

Prior to my fender mod above I was using a Topeak DeFender FX Bicycle Fender. Although designed for use on the front of a MTB, it can be modified to use as an inner fender to keep muck off of the rear shock linkage and shock. I decided to purchase the unit to improve the look of my beloved Sur Ron. And while doing so I made some modifications of my own….

For 14 bucks I converted the Toppeak front fender into a rear fender and inner fender.
As you can see the “front” of the Toppeak is about four inches longer than the stock Sur Ron rear “fender.” It should be enough to keep more mud and water off of my backside…. I used the stock fender as a template to cut the corresponding slots to fit the new fender to the seat. In addition I created two bolt holes to use with the seat studs in order to make the installation more secure than the stock unit. There is flex to the fender, just like the stock unit. It’s meant to protect my backside from muck and water, not to mount items.
My former inner fender which is a Honda MX mud flap. Worked really well, just prefer the lines of the new configuration.
The rear part of the Toppeak is what I used for the inner fender. It nicely follows the line of the tire and just if not more importantly offers better coverage for the rear linkage.
A from behind view of the fender hack.
I opted to modify the Toppeak’s bracket so that if I decide I want to go sans inner fender I can! And if for some reason the inner fender breaks I can just buy another Toppeak and replace my ‘inner fender’ with no effort at all.

Just pressing a button on the clip removes or installs the rear inner fender. Easy. And yes all you have to do is make a small aluminum bracket to hold the clip. It doesn’t rotate because the fender is butted up against the bracket.


  1. I really like what you’ve done with the CRF 70 body kit for fenders. Coming from a motorcycle background myself I can appreciate the good looking aesthetics. But could you maybe give me some better photos of the brackets you fabricated both top and bottom I’d like to reproduce a similar look for my bike. Thanks for your time.

    Patrick Cox

    • Patrick when I have time I will photograph my bracket. For the rear I simply bolted the CRF70 fender to the OEM fender. I have yet to find an adhesive effective enough to use on the OEM plastic.

  2. Hello Mark
    Sense owning a Sur-Ron two to three months ago It was your mods and opinions that sold me on this bike !
    Thanks for such a great informative website on this bike I refer to it all the time
    “Mounting my MudHugger to the stanchion fork guards was the way to go” –
    When you did this mod for the Mud Hugger Finder , did you have to make some pretty one of a kind brackets
    to mount to the stanchion fork guards ?
    I have an original equipment DNM fork for now that has those Stanchion guards .
    Am I going to have to make my own plastic connection for the MudHugger ? Your opinion Mark ?
    Thanks , Scott Beery Tehachapi Ca.

    • Hi Scott thanks for telling me the site has helped you. I hope you enjoy yours as much as I do mine. I’m not familiar with the DNM forks, but if they have lower stanchion guards then all you have to do is attach the fender to the guards. I had to use a heat gun to gently form the fender attachment points to the stanchion guards. Not too tough though. Just be patient and go slow.

  3. I was reading you surron review and the website for the past hour and I couldn’t help but notice how easy everything was to read, and how informative all this is. I love what you did with your rear fender front the Honda CRF70 body kit, because I personally dislike how the tiny stock fender makes the back wheel stick out. Thank again.

  4. Hello if you are still here. I’ve a DNM USD 8 and is in desperate need of a front fender.

    Regarding your front fender mount position , when the fork compresses , won’t it just go into the fender?

    • I have explained how I mounted my front fender in the Fender section. It’s just below the stanchion tubes connected to the fender photo. Because the stanchion guards MOVE WITH THE STANCHIONS the fender DOES NOT foul on the tire. If you examine road racing motorcycles you will see that the front fenders are mounted the same way on inverted forks.

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