Motorized bmx

[Amwicr]

Check this out:

https://rideukbmx.com/ride-uk-features/tom-linsell-motorised-bmx.html

not mine but I'd love to try that. My friend offered me a free motorized bike thats missing some stuff, but the motor is good...

I could get a real cheap old bmx...

hmm...maybe gear it down a bunch and do wheelies, I dunno...

 

[Gordy]

The problem with bmx bikes is they are hard to shoe horn an engine into. It would be fun though

 

[Amwicr]

Yeah. I have an angle grinder and welder, so I'm unstoppable

 

[Amwicr]

Got some progress

 

[Gordy]

Got some progress

Be careful welding that galvanized pipe, they outgas alot toxic fumes

 

[Amwicr]

Be careful welding that galvanized pipe, they outgas alot toxic fumes

Yeah Imma be removing the coating first.

 

[Gordy]

Yeah Imma be removing the coating first.

Still be careful, you might not get it all

 

[Whitewill1412]

You're actually doing it. That's awesome

 

[cloakedvillain]

Older american bikes were designed to be welded. Usually had 3/16" walled tubing. The chicago schwinns were famously spot welded in a hyper efficient process. https://www.sheldonbrown.com/varsity.html

On the board track replicas builders often give the frames purely cosmetic drop loops but I've seen a couple bmx builds that have a drop loop for function rather than form.

Boxy belly:


Top loop frame:


Wishbone top tube:

Another box belly:

Camel back:

Diamond frame:

Another wish bone top tube:

Chopped and screwed: https://motorbicycling.com/threads/tuning-for-speed.67743/post-703027

 

[robe]

Nice collection of vids. Thanks