Sweet Homemade Mini-CHopper

This is my homemade Mini Chopper. I recently got rid of the motor in the video and replaced it with a new 3 hp Honda clone from Harbor Freight. Top sleep in the video was about 39 down the hill. I have hit 52.4 with the new motor on an extremely steep hill.

Category:

Autos & Vehicles

Tags:

• sweet
• homemade
• mini
• chopper
• briggs
• and
• stratton
• custom
• fast
• good
• gas
• milage
• MPG
• alternative
• transportation
• moped
• americal
• made
• green
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• bike
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• parts
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• helmet
• pot
• hole

[Tmatuszak]

Haha no way.....I've never heard of anyone welding material onto a camshaft! How much more lift and duration on the exhaust did you say?

[delmole85]

@Tmatuszak I should have went into a little more detail, but i don't really want people try this because it is soo easy to screw up. i put a piece of sheet metal up against the exhaust lobe and scratched the outline onto the sheet metal. I then cut out that profile using a dremel and stationary belt sander. I traced that piece of metal on a piece of paper, scanned it and put it on the computer. then using Microsoft Paint I created a profile that was 0.5mm taller and the arc of the lobe was wider

[delmole85]

@Tmatuszak There was a slightly more gradual lift. This increased the duration a little bit. To be simple you could simply stretch the lobe on Paint to make it taller, I wanted the extra duration though. Print out that picture and cut out the shape. Weld a bunch of material on the lobe. Then sand off the excess using a stationary belt sander and match it to the profile you created and printed out. I got my sander at harbor freight for $30. its a 1x30 inch belt.

[delmole85]

@Tmatuszak I'm now realize that these messages aren't going in the right order but i'm sure you can figure out what i'm saying. When sanding the cam material off keep using finer and finer belts until you are pretty much just polishing it with a worn out paper belt. In short, You shouldn't try this unless you are ok with wrecking a motor. I there is also a hotter spark plug and i ground the bottom of the valves off a little to make them seat better. Compression raised from 65 to 145.

[jsbowman86]

Put the 410 cc engine they have up there on it lol

[delmole85]

@jsbowman86 I think the 6.5 would be plenty. Its sort of annoying how slow it takes off, but its all in the name of good gas mileage.

[ciclotronforever]

Nice!