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Discussion Starter · #1 · (Edited)
I had mentioned awhile back in some long lost thread that I was looking into solutions for preventing the fenders from flapping around at high speeds. It's embarrassing to say the least, so I ordered a bunch of magnets and began taking high speed runs with them (on closed roads of course).

I've settled on a relatively cheap magnet fix, and I'd like to share the prototype setup I have going. I've hesitated to do a permanent glue fix, since my Slingshot is wrecked and I will be getting new body panels this winter, but this should give you an idea.

I settled on these magnets (2" x 1" x 3/8" Epoxy Coated, 59lb pull) here ($6.50/piece). They are really cost effective and have a ridiculously strong pull for the size.

I also have a set of these (4" x 1" x 1/4" 75lb pull) but have not tried them yet, as the set above seems to be working well, and spacing wise they fit better.

*** CAUTION ***
I'll say it again, these magnets are ridiculously strong. Even when wrapped with an inch of cardboard and bubble wrap they were picking up items off my desk. You want to keep these away from EVERYTHING metal, don't unwrap until you are free and clear of electronics, sharp objects, etc. I set them down on my work bench and my cordless drill, screwdriver, and various other metal objects went shooting across to them. I pinched my fingers no less than 20 times and they are hard to get apart from themselves, let alone the flat metal plate I'm using. Too many slips, letting them slam into themselves and other items, and these magnets can fracture and shard (ask me how I know... this wasn't my first set). Please be careful, the seller has all of these warnings, and I was thinking "I know how magnets work... you don't need to tell me..." boy was I unprepared. Though I was giggling at the strength between finger injuries.

I bought a $5 set of brackets at home depot. Here is the size of the two pieces. This magnet is actually sticking to the steel belting inside of the tire. They are kind of ridiculous, maybe overkill, but lesser magnets I got from my local hardware store wouldn't get the job done. Don't judge my taping, it was only for rapid prototyping and changing position, I will probably pretty it up here for the remainder of the riding season.
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I taped the magnet to the headlight with Gorilla Tape (glue eventually when I decide it's permanent):
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And the metal plate to the edge of the hood lined up with magnet (again glued when I'm satisfied it will be permanent):
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This works really well, I've tested it up to 110 mph and they have all but eliminated the shake. I think another set mounted at the rear fender mount would likely make them immovable, but would probably make it really hard to open the hood, whereas this mounting point still allows a fairly easy pull to open the hood.

Let me know if you have any other ideas, or results for those that try it. Pretty cheap $20 investment (plus glue and tape if you don't have it) to fix a problem that bugged the hell out of me.

Cheers!
 

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Discussion Starter · #4 ·
Pretty damn ingenious Jook!! I did not even know they made magnets that size that strong. Great tip!!!
Me neither until I started searching. Certainly didn't think they had any this strong for this cheap. I would also caution people who take the next step to gluing, that you should consider a piece of sticky foam or layer of duct tape on the surfaces to lessen the blow. These magnets put quite a bit of stress on themselves when they smack together, even with other metal, so a nice cushion to soften the blow should help them last longer. In the absence of long term testing, I cannot say how many hood openings they can take before having structural problems. The pair that broke the easiest had countersunk holes, in case I wanted to screw them to plastic for the glue mounting points, but they were structurally compromised and only lasted about 30 minutes. Never made it onto the road with them.
 

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i so need to do this. my hood flaps like bird's wings at high speeds.

question though, do it make it more difficult to raise the hood with these magnets?
 

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i so need to do this. my hood flaps like bird's wings at high speeds.

question though, do it make it more difficult to raise the hood with these magnets?
It doesn't make it difficult.

What worked perfect for me, instead of worrying about gluing or taping these very strong magnets, which wasn't going to hold long-term... at the hump where the rubber stoppers hit, I zip-tied the magnet to that hollow hump, then screwed the bumpers all the way down and with some stretchy electrical tape, secured the metal brackets on top of the rubber bumpers. The thickness of both the tape and zip-ties keeps the magnet from smacking the bracket too hard. Holds perfect at any speed. You feel the resistance when opening the hood, but it doesn't stop it from coming up.
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It doesn't make it difficult.

What worked perfect for me, instead of worrying about gluing or taping these very strong magnets, which wasn't going to hold long-term... at the hump where the rubber stoppers hit, I zip-tied the magnet to that hollow hump, then screwed the bumpers all the way down and with some stretchy electrical tape, secured the metal brackets on top of the rubber bumpers. The thickness of both the tape and zip-ties keeps the magnet from smacking the bracket too hard. Holds perfect at any speed. You feel the resistance when opening the hood, but it doesn't stop it from coming up.
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thanks for replying.. ill be ordering these magnets today.
 

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magnets ordered..just need to find the brackets at my local home depot.
These magnets are so strong, almost any piece of metal will do. It almost held with no bracket all all, with just the force attracting the bolt inside the rubber stopper, but it fluttered about 90mph, so I added the bracket.
 

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If those magnets are that strong, it's going to put undue pressure on the opening latch. jmho

Just too much pull on the plastic. This is how I solved the problem.
 

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