Motorized Bicycle FRAMES and GAS TANKS [Harken VS Mad Moto Inc]

Where do you source parts for your Motorized Bicycle Board Track Racing Tribute build? Today, I review two popular options from Harken Cycles and Mad Moto Inc. I share the welds, dimensions, and details comparing the two frames and gas tanks. Although these aren't restoration projects, you can source new parts at a fraction of the price of originals.
***UPDATE: Madmoto is out of business and his website is down. Harken can be reached on ebay but has recently received some negative reviews and i believe he's using another ebay name (axiongreen). Try reaching out to him directly. If you're looking for a frame/ tank, shoot me an email at [e-mail] to see what I recommend.
Harken Cycles eBay-www.ebay.com/usr/harken-cycles/
amzn.to/3yZAnXS Upgraded motor mount I mentioned in the Harken part of the video.
MadMotoInc.com to order from Mad Moto Inc.
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Join our growing community on seymourcycleworks

[@unlv9795]

Great Video. These 2 companies have awesome bikes but I'm amazed that they are still in business. They have the most convoluted ordering process, terrible customer service, horrible email responses and awful/no web sites

[@diggingthewest7981]

Been waiting like 5 years for harken to email back😅, screw em

[@travisvogtman3180]

Both are out of business. Any other frame designers that don't break the bank?? Any info would be appreciated. Thanks in advance

[@sonikboom007]

The harken is nice but he should definatly bolt a block of wood in the rear drop outs for shipping to avoid that bent drop out in the future. Ill be ordering a harken soon!

[@juanbarturen2726]

This bri gs back memories. Back when I was in my teens. People threw bikes away. I found a heavy frame and I installed a Brigs and Straton lawn mower engineer uncle was nice enough to weld plates and stuff for me. But I usedv20 in wheels... that's when kids . At least the ones I knew. Built their own stuff. I much does one of these kits cost? Thank you for sharing

[@Boneze46]

Nice work 😮

[@MadMotoInc]

Great video! 🤘🏽😎

[@motorizedbicyclenation53cu90]

Build your own with high tensile steel

[@ericbarbosa5582]

When shipping a frame should always put a block in between rear dropouts and forks so they dont get bent Looked bent to me id raise a stink

[@ronc7743]

Good eye!

[@yusufmaulana3223]

I like engine

[@jameskogler1504]

If the tank is bolted are you keep it from leaking?

[@catsbyondrepair]

You could stuff a predator 670 in there and have a beast

[@beacondog2440]

I was thinking about that but I would be afraid of it destroying itself

[@KB_Joys]

Yeah like where can i get the best deal on a drop loop frame?

[@DylanJones-tf9jy]

Do you think I could fit the predator 301cc on that harken frame?

[@leonardarola]

Fastest in the state. Harken is the way to go. Seen my engines?

[@lingconninomagadan9808]

Can you give me the link regarding the Harley Davidson frame

[@BuildBreakFix]

The first frame known to be a death trap and the tanks leak like hell from vibration shortly after. Tubing so thin walled they crack around crank tube constantly. Dead give away the welds you see are 90% fitishiou is look in the crank tube itself! no heat marks even from the welding process 90% time means nothing penatrated the parts well. Same cheap frame you find resold 100's times by other dealers. Just saying welded 3 of those frames now for people in last 3 years always same spots. Second frame no ideas about and is the one I got sent here to see since your only one uploaded a video on it. any updates how it's holding up?

[@heavystarch100]

As a common practice, you should always use tank sealer to avoid vibration leaks or questionable welds.

[@bluesman3794]

Wheelbase? When you get it. Also are the historically correct in scale, WB from HD & other bikes of that time period?

[@alejandroseri]

No. All these guys need to start building frames for 29" wheels to make them to scale. If you are 6 feet tall, you dwarf all these 26" bikes

[@josesepulveda6796]

ME PARECEN MARAVILLOSA LAS BICICLETAS CON MOTOR DE 2 TIEMPOS CON UN ACABADO ANTIGUO, INDIAN O HARLEY DAVIDSON, PERO CUANTO SE ESTARIA INVIRTIENDO EN $$$ PARA TENER UNA BELLEZA COMO ESAS.

[@cbrock420]

Been wanting to build a board track style bike. Ive also been trying to find a good frame and tank as a starting point. I cant seem to find a supplier for a good frame and tank combo because almost every good website, you either cant buy directly from, or like with these two frames, they came up with expired websites. That or you cant just get a frame because they want to sell you a whole bike. Ive yet to build a motorized bike. Ive been doing my homework and im ready to pull the trigger, but all ive been able to figure out is that they sure dont make building a bike easy.

[@Adventure_Man]

I'm in your same position right now, but I've been looking at Sportsman Flyer's stuff. Haven't ordered anything yet so I cant speak to quality of parts or experience but it seems like the only option at the moment.

[@SeymourCycleWorks]

Sportsman Flyer is the only drop loop frame producer easy to order. You can check eBay regularly. Also, head over to here to grab my parts sourcing list where I suggest several options for parts:shorturl.at/lzR18

[@cbrock420]

@@SeymourCycleWorks thank you for your reply. I appreciate it. Ill check them out.

[@N.S.F.C]

Where do I go to get just the mad moto inc frame? Is it a one peice crank? Have you ever seen a workman hub laced in the rear wheel?

[@SeymourCycleWorks]

Unfortunately, he’s out of business. I have a couple frames from him I’ll let go. Shoot me an email at [e-mail] if you’re interested in snagging one.

[@SeymourCycleWorks]

Yes, Worksman wheels are good and their hubs are super heavy duty.

[@N.S.F.C]

What frame are you using? I like both of these. Just cant figure out how to get one.@@SeymourCycleWorks

[@nathanielhart5267]

I’ve been trying to buy frames from Harken for Months. How did you accomplish that?

[@SeymourCycleWorks]

He’s been selling them on eBay.

[@markblanchard88]

@@SeymourCycleWorks He seems to be selling only finished bikes at the moment. Too bad as I've been trying to buy a frame and tank for a while now.

[@SeymourCycleWorks]

@@markblanchard88 did you message him? He may not have just frames listed right now but he usually sells them if you reach out

[@markblanchard88]

@@SeymourCycleWorks I did. Left a message via his website twice. Got no response. I'll try emailing him directly. Thank you.

[@patricktackett9860]

How much was the mad moto kit you purchased? His site is still down and I'm looking into to building one of these beauties but can't seem to find a unfinished roller kit. Any help is greatly appreciated and thank you for the vids, awesome build!

[@SeymourCycleWorks]

I believe the roller from him is under $1k but he charges a bit more for mounts depending on which engine you’re going with. He should have the site back up soon. Was just talking with him last week about it.

[@haulngrassracing]

@@SeymourCycleWorksThe website is still down and everything on Facebook is a year or more old. Is he still in business?

[@SeymourCycleWorks]

@@haulngrassracing I don’t believe he’s selling kits to the public anymore u fortunately

[@haulngrassracing]

@@SeymourCycleWorks ahhh ok that’s a bummer. Thank you

[@SeymourCycleWorks]

@@haulngrassracing send me an email at [e-mail] I have a limited supply of frames I may be selling in the near future.

[@1945willysjeep]

Neither of these companies seem to have this stuff for sale anymore. Did they both go out of business or something?

[@SeymourCycleWorks]

I just checked with Mark with MadMotoInc.com and he said the site is down but should be back up soon. Harken has stuff on his eBay store- www.ebay.com/itm/144725464139?mkcid=16&mkevt=1&mkrid=711-127632-2357-0&ssspo=arejcw5YTjK&sssrc=2349624&ssuid=&var=&widget_ver=artemis&media=COPY also check out Sportsman Flyer

[@fistofthenorthstar9010]

the second frame has cold welds,lots of stop starts,inconsistent. they wire and spater. the tank mount welds look nonexistent.

[@michealfigueroa6325]

Not a FAIR Comparison and many of the views express real buyer concerns that give me cocerns about this site

[@SeymourCycleWorks]

MadMotoInc has taken down his site and Harken seems to be using a different eBay name. Sportsman Flyer is still up though

[@MrOlddude1957]

Just build your own frame.

[@Richard-oi5qz]

Very sad welds dood

[@KeithSage]

Sloppy welds. The second bike is a whole lot better.

[@rangerjones5531]

Fast forward to about 1:40 , you're welcome

[@jasonadams539]

I have a question, think maybe you could stop saying Um, so much.

[@SeymourCycleWorks]

Thanks for the feedback. Always trying to improve my camera presence and quality of the videos.

[@jasonadams539]

Um. Um. Na just kidding bro, for real though over doing the ums man. Bikes beautiful but the ums are off the hook.