Picture of Make Your Bike ROAR!
Make your bike roar like a motorcycle using just a piece of plastic!

This is an old trick my Dad taught me, though I'm sure many of you have done this before. It will make your bike make a sound like a motorcycle when you go, and the faster you go, the louder it gets!

Stuff you'll need:
A piece of plastic, like an ice cream bucket lid.
Tape, duct tape works best, remember, this is on your bike so it will be outside.
A bike, of course.

Could someone make a video with the sound of this thing? I would make one myself but I'm on dial-up so I can't upload video.

Step 1: Make the flapper

Picture of Make the flapper
For the piece of plastic, an ice cream bucket lid works great. Other reasonably stiff pieces of plastic will work too, but make sure you don't use one that's too stiff or it might damage the spokes on your bike. I couldn't find an ice cream lid when I started making this instructable, so I used two bendier sour cream lids (I later found an ice cream lid, that's what the yellow ones are from).

Get the piece of plastic, and cut out a piece about four inches long by one inch wide. You can make multiple ones too, it might make it louder (I've never used more than one at once though).
happyjo4 years ago
OOoh! I will have to try this! :D
tassie24 years ago
i saw this old idea from when i was akid
made the one in my pics out of a small chocolate tin with a removable lid. a flat piece of very tough polyethylene storage tub plastic goes thru it in a slot. Inside a bit of wood traps the flapper and it is scrwed so it won't come out. lid is screwd on also with self tapping metal screws. The box is mounted to bike back frame with a bent bit of old door hinge.
This one I made is 20 X louder than the old playing card ones we had!
My nephew rides the bike and you can hear him coming 1/2 a block away!!

PS acommercial " exhaust pipe is in toy shops with a faux plastic exhaust attached. This one blows it out the water!
Cost nil old junk value guys. Hope the vid works etc.
Tassie 2 Australia
tassie2 tassie24 years ago
the metal tin makes the noise resonate and it sort of vibrates as well.

The two holes in side are about 3/4 inch diameter punched into tin with wad punch.

The flapper is like a double finger shape where it catches the spokes. by changing the shape and hang past on spokes, and also the flapper materials you can alter the sounds. The commercial one has 3 or 4 different cards you snap into a holder for different sounds. A video on u tube shows that one. This one .. advantages,,, cheap and cheerful. made of junk. what more could a noisy young Fonzie want!

PS the bike is a really neat bmx with simulated motorbike fairings, swingarm type rear end, disc brakes, and adjustable centre rear coil strut suspension.

Cost me 30 bucks from a charity shop down under!

The great things kids these days have to play with !

tassie2 (a 50yo old fart tinkerer from aussie! )
blake775 years ago
 of course you have to use duct tape its the bomb nothing beats duct tape 
fastback5705 years ago
the Louder option: (if you don't have a 1000 wheelset) is to wedge a half crushed 1 liter soda bottle in between the seat stay and the spokes.
ScienceWiz5 years ago
This would be fun to do to my bike and take it to the Velodrome (track)
The people would freak out as I went ripping past them with this thing installed!

Great instructable
skunkbait7 years ago
Cool! Haven't seen this in 30 years. Back then we used playing cards and clothes-pins. I think I'll do this to my kids bikes.
I hate to think how many baseball cards and clothes pins I ruined as a kid doing the same thing!
I had always used a pop can. I would bend it over the back tire and the rear fork would keep it in place
I haven't done this in years. Nice job, +5/5 stars. I can't do this because me and my friends destroyed my bike. ;-)
Excellent smiley! 8-)
alternatively: chain a mountain lion to your bike. Make it run alongside you, pulling you up hills! Makes a great theft deterrent too.
lol awesome idea :)
And to think department stores make you pay for this huge yellow/purple handlebar attachment.
I used to just run over an aluminum soda can with the front wheel. It would grab onto the tyre, travel up to the back of the fork, and then make a beautiful motorbike sound as the knobbly tires passed through it. It slowed the bike down a bit. Good times, good times.
yeah that works real good if you put it on the back tire
difflock7 years ago
people actually pay for a version of this for there kids bikes (at least, they do here in the UK) Shops charge anywhere from £10 to £20 for a kits which is a flapper like this, and sometimes has a small cone that you fix next to it, to amplify the sound even more! But good instructable! its been a while since I did this to a bike!
I made a video but with a playing card and masking tape so you dont ruin your paint. just search "make your bike sound like a motorcycle " in metacafe. I made and instructable too
Pie_eata7 years ago
i used to just put like 5 zip ties per wheel made an interesting sound
Me likey 5 stars
Jake Turner7 years ago
Can I has? kthxbai.
"Every time you 'can has', God kills a lolcat."
Another thing you can do with some bikes is ride straight over an empty but not crushed aluminium soft drink can with your back wheel. It folds around and then gets pulled to the top of the frame where it gets stuck. so the can is held by the wheel moving and it rubs on the tire. It sounds pretty cool usually
Aeshir (author)  The Rocketizer7 years ago
Yeah, but I don't think rubbing stuff on your tires is good for them.
Yeah I don't reckon it would be, but usually you only do it for a short amount of time to show off, you don't leave it on your bike all the time as you may do with your way.
Aeshir (author)  The Rocketizer7 years ago
Yeah I thought so lol
Doveman7 years ago
I used to put a card on my bike... It would fall off sometimes, but man, it was cool!
mefromliny7 years ago
Excellent! I just did this really quickly and my daughter loves it! Good job. Ken
ll.137 years ago
Hehe, I prefer quietly coming upon people, and whizzing straight past them. =D