Mini Bike

[miner49r]

Holy Crap Steve. Even the Jockeys I know are too large to ride that.
Have you hired your race team yet? :big:

 

[stevehuckss396]

Holy Crap Steve. Even the Jockeys I know are too large to ride that.
Have you hired your race team yet? :big:

Yeah, It's pretty small. One third scale exactly. From the bottom to top of the frame is only 5 inches. I even measured the radius of the bends and made my bending shoes 1/3rd radius.

About the only thing i have to cheat on is the rims. The original rim is 5 inch. I am going to use a 1.9 RC tire so my rim will scale to 5.7 inch. The tire I found wont have the correct tread but is almost exactly the right size. I did find chain that is almost exact but it will be plastic. Can't find metal chain with a .125 pitch. The plastic is .1225 pitch, close enough.

 

[Ogaryd]

Hi Steve, I'm really enjoying your build. This brings back memories of my Fox minibike with a Westbend 2 stroke. It was fast & fun. My father rode it and told me to get rid of that damn thing. I suppose it was a "little" unsafe. Gary

 

[stevehuckss396]

I suppose it was a "little" unsafe. Gary

That's what made it so fun. I can't remember anybody getting hurt other than basic scrapes and bumps.

 

[stevehuckss396]

Made the die to crimp the forks down by the axle. Works well and is almost exact to the real fork. I tested it on a scrap piece of tube and it looks good. The crimp is not exactly centered because I was too lazy to drill the tube to pin the die before testing.

 

[steamer]

Oh yea that looks very familiar!
These bikes sound really cool by the way with studded snow blower tires on them....... :big:

Dave

 

[gbritnell]

Looking great Steve but come on now, make up a program to pop out a ton of side plates, or maybe 2 tons :big: and make your own chain. As an aside I have seen model motorcycle guys make photo etch side plates and build their own chains. I don't know that I would have that much ambition but I guess that's what separates Lou Chenot from me.
George

 

[b.lindsey]

Steve, McMaster does carry miniature chain and they have a version in S.S. but the pitch is .148"...probably too far out of spec for you. They are quite proud of it though ar $41 a foot. I had found it while researching a new project for myself. They carry some miniature sprockets too but similarly pricey!!

Bill

 

[HS93]

this is metric but may not be of any use but a lot cheaper they do have other chain

http://www.technobotsonline.com/steel-roller-chain-04b-6mm-m.html

Peter

 

[stevehuckss396]

this is metric but may not be of any use but a lot cheaper they do have other chain

http://www.technobotsonline.com/steel-roller-chain-04b-6mm-m.html

Peter

That chain is 6mm. It is almost twice as large as what I need. The .148 may look way too big also. I know the plastic chain is a bit of a cop out but it is only .0025 from scale. It won't do any work except freewheel the rear tire unless I can find someone too actually ride it.

 

[stevehuckss396]

The die worked perfectly. The frame is done! Now I can move on to something else but I am not sure which way to go.

 

[steamer]

Oh thats a tough one.....lets see....what could you do .......wow
let me think ummmmmmmmm
Dave

 

[Mosey]

Mold some miniature handgrips!!

 

[kustomkb]

Great idea for a project Steve. The classic minibike is, well, a classic.

Nice to see all of the frame parts fixtured up.

Have you designed the engine already?

 

[RManley]

Handgrips would be great ;D

But only because its something I need to do at some point in the not so very distant future.

As you have the chassis done, why not support it on some wheels...

Rob.

 

[Blogwitch]

Steve,

It seems that gnomes are taking over the world

http://modelengineeringwebsite.com/SE_Racing_bike.html

Great topic BTW, it is keeping me well entertained and enthralled.


John

 

[stevehuckss396]

Have you designed the engine already?

Nope! I actually took the head off the doner motor and drew it up yesterday. I am just beginning that journey. Long way to go.

 

[stevehuckss396]

Handgrips would be great ;D

Hand grips would be great if I had a clue as to how it is done!!


Thanks Bogs! That bike is awesome.

 

[Blue_Rock]

It won't do any work except freewheel the rear tire unless I can find someone too actually ride it.

Looks like we have a volunteer

 

[Speedy]

I have jiddery eyes today so I am only looking at the work in the pictures.

maybe you posted how,
this is the kind of model making I hope to start soon, have an engine I would like to put in a midget car.
how did you go about scaling your frame down to size?

amazing work!