# Mountain Bicycle Chopper

Hey, ever wanted the power to see peoples heads turn?,

get that hot girl of your dreams (the validity of this statement is unknown :P ),

or just want to look freakin cool?

Then you should invest in building your own chopper bicycle!

Its fun, not so easy, but still fun!

lets get started.

This instructable was based off of mountain lion chopper, but i will actually specify dimensions unlike the other one.

All thanks goes to Atomic Zombie!

*UPDATE*

Now that I have rode around town on this chopper eye candy, I realized what a great decision I made! The looks people give your are PRICELESS, and a couple of times people actually got out of their cars to take a picture. Trust me, this chopper beats riding on the crap 30\$ murray mountain bike it was before!

Don't wait, you can pimp out your ride too! just follow the instructions!
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## Step 1: Get an old mountain bike

If you have a Murray mountain bike, this works best, but any old mountain bike will do.

This is exactly what the bike i used looked like.

## Step 2: Remove everything from the frame

Sounds easy enough, but you will have to take off all the equipment from the frame

TAKE PICTURES OF WHERE EVERYTHING WENT, THEY WILL SAVE YOUR LIFE LATER ON!!!

## Step 3: Make a gameplan

It is wise to make a sketch of your work, and since I did all the trigonometry for you, you can skip this step.

## Step 4: Cut your Forks

Your forks should be cut where it is flat, so cut somewhere in the middle of your forks

I chose 7.5 inches down, but the height may vary on your bike.

## Step 5: Forks cut

This is what your forks should look like cut.

RA productions13 days ago

Great project!! The bikes look great

hahaha just upgraded the forks of the mountain bike and with small wheels. :3

hahaha just upgraded the forks of the mountain bike and with small tires. :3

otherunicorn1 month ago

Or you could use inserts of a smaller diameter to join tubes of the same diameter, which is what I did on mine.

ottawafm4 months ago
You should alter the lower tube between the pedals and handle bars by putting a 20 hp motor! Then heads will turn!
athakur175 months ago
DUDE thats AWESOME!

I see your main frame looks more beefed up than mine, did you mod that?

That looks sick man.
5 months ago
yess i made from strong pipe and weld it. Can u tell me what Colour should i put on my bicycle. I am Confused about Colour. Pls
kavo3 years ago
why do you have to modify the frame?
If you dont change the angle of the goosneck, and extend the frame, you will make an akward/unstable bike which is impossible to drive.
11 months ago
That's what I did with my bike, lol! I can stablize it though
Mitchvdk2 years ago
Awesome, that looks better than mine lol!

hey I see you didn't take me advice about the front brake...wait there are no brakes!

good job bro, I like it!
2 years ago
Wow thanks man but it does have a brake lol. I shall post a new photo because it looks a lot better right now but thanks for the inspiration!
2 years ago
hell yeah white walls
IndianDrives2 years ago
I think this is the place where we will get best ideas for building own chopper bike. Cheap Cars for sale
awesomevampire3 years ago
am a pre teen and i want one of these, but what do i do
if i get ant taller i'll out grow it really quick (i'm really tall)
or should i mak it and make mods when i get taller

pretty pretty please with extra ice cream, hot fudge, and rainbow sprinkles on top !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
listen....there's no such thing as "too tall" for anything.....

If you mod a 26in bike using my methods and measurements, there is NO WAY you could out grow the bike, unless your dad happens to be big foot.

so go ahead and do whatever whenever- with your sprinkles and rainbow pony pickles.

p.s: don't hack your sister's account, unless you like a hand print across your face; take it from a guy with experience.
3 years ago
Funny thing... I'm 6'8" and basically all standard frames are far to short. I'm planning on adding a small frame section to the bottom that pushes the pedals further towards the front tire and creates more leg room.
you do that wooly mammoth. :)
LETMESEE3 years ago
A guy up the street from me did this a couple months ago ....He let me ride it but it was so hard to control!!!!!!!!!!!!!! :P
hey guys, check out my new instructable:

http://www.instructables.com/id/UnReAL-SuPeR-LED-VU-Equalizer-Jacket-With-SPEAKERS/

enjoy!
vishalapr3 years ago
This is really cool, well done , rated 5*
Andy2443 years ago
cool chopper dude, enjoy it!!
Cheap cars3 years ago
nice chopper bicycle! Thanks for sharing a lots of information.

Used cars
struckbyanarrow3 years ago
yep, i hear some creaking...... :P
mikeasaurus3 years ago
Nice rake!
I've seen signs of bike with rake's similar to this fracturing near the head due to stress of the front wheel being so far out, is there a threshold calculation based on frame thickness/rake degree or is just a prototype? Other bikes I've seen have adopted a tension cable from front hub to frame which you may consider.
Either way, the bike looks great!
You should show me this "tension thing", actually this is the first time I have ever made anything from my own, let alone complete it :)

I don't know how long the forks will hold, they are really sturdy though. My rule of thumb is "The First pothole's gunna be the Last pothole :P"
3 years ago
Here's an example of a tension string placement. From what I've seen the tension is held by steel wire with a thickness of about 10mm, from the from wheel hub to somewhere on the frame. I think this would only be necessary with bike with a wide rake, but there's probably a calculated 'sweet spot' where you can maximize the rake without a tension string.

Whatever, this is a homebrew project and there is no need to over-think it. Have fun, break your bike, rebuild it better than before. Be safe and have fun. Keep building those 'choppers!
(typical bike silhouette with tension string example in red)