Making my own ebike if....

[sc00ter]

I got my old Fairdale Taj 26" bmx bike back. I gave it to a friend and he rode the crap out of it but he locked it outside. He recently gave it back to me. As I tear into this stupid idea I have discovered the seat post is stuck in the frame and the bottom bracket (mid-drive) has a stuck arm shaft. I bought some Free All or something that's supposed to break loose rusted/stuck stuff. I know this much, the spray stinks! I'll look the name up later. I've been soaking the seat post with PB Blaster and Releasall for over a week now. I pulled the forks so I can soak the inside of the bottom bracket and the seat post thru the inner frame tubes. Eventually the spray came out of the weep holes at the end of the seat/chain stay junction. I hope this idea works as these 2 parts are super stuck and have stopped me in my tracks.

My plan is to get a lower powered front hub motor like a over-priced SWYTCH and run a coaster brake rear wheel, or get a powerful front or rear hub and have disc tabs welded to the rear frame. This frame and fork can handle any torque arm and the related parts and equally as bulletproof. If I do a rear wheel motor I'll get some nice suspension forks with disc tabs as well. I love this bicycle so much that I know it'll be a fun project. So if I get everything out I'll start my hunt for motor options.

 

[sc00ter]

The frame in question. Anodized aluminum post in 4130 steel frame and mid bottom bracket. Also, assorted weapons.

 

[6zfshdb]

Try Kroil:

https://www.amazon.com/s?k=kroil+original+penetrating+oil&hvadid=558556438984&hvdev=c&hvlocphy=9058761&hvnetw=g&hvqmt=e&hvrand=8070634709244379170&hvtargid=kwd-1457736945571&hydadcr=1008_9642245&tag=googhydr-20&ref=pd_sl_5j8mc66bc1_e

Pricey, but it's the best penetrating oil I've found.

 

[sc00ter]

I think I saw that Kroil, at NAPA I think, but passed because i never heard of it. Will give it a try! That Releasall is good stuff but im almost out. I might bring the frame to work this Friday. We have a heatwave coming our way and work has a massive vice in an air-conditioned lab!

 

[PCeBiker]

Try Kroil:
Pricey, but it's the best penetrating oil I've found.

Ouch !!!
That stuff is expensive in Canada.

 

[6zfshdb]

It's cheaper per ounce if you buy it in bulk:

Amazon.com

 

[PCeBiker]

It's cheaper per ounce if you buy it in bulk:

Amazon.com

View attachment 177720

So is that 5 grand USD or CAD?

 

[sc00ter]

Success! The vice that made it happen. That gold seat post was a bear! My co-worker helped me wrestle the seat post and the bottom bracket.

 

[PCeBiker]

Success! The vice that made it happen. That gold seat post was a bear!

When I had a rusted seatpost, I stood over the bike facing backwards and pinched the bike between my legs.
(like a vise. )

Then I pounded on the seat sideways to break it free.
Then I'd pound and pull on the seat ¼" at a time to Zig Zag it's way up and out.


I don't know what you've got going on with the vise, but I couldn't get my seatpost out of the frame.
I'd have to clamp my whole e-bike in the vise to pull on the seatpost.

Removing the seat from the seatpost is easy.
Just stand over the bike and pound on the seat.

If your seatpost is free to move in the frame, then lower it as far as it will go before you start pounding on it so you're less likely to bend the seatpost.

 

[il Munduato]

Success! The vice that made it happen. That gold seat post was a bear! My co-worker helped me wrestle the seat post and the bottom bracket.

I've had good results even with WD40 if you are patient and give it some time... then the next step is a heat gun. Expansion is your friend and it doesn't need to get hot enough to peel paint.