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  1. Nebraska03

    Square Tubed Minibike Frame project

    It's currently sitting in my folks shed for now. Life happened and I've had to focus more on work, etc. But I would eventually like to get back to it, put a bigger gas tank on it, etc. I have a 2-quart fuel tank I had pulled off a mid-60's Briggs 5-hp in a scrap yard, but had trouble mounting...
  2. Nebraska03

    Square Tubed Minibike Frame project

    @Lizardking , thank you. That is the best representation I've seen of what my minibike should look like. Much appreciated!
  3. Nebraska03

    Square Tubed Minibike Frame project

    @Lizardking , I agree with you, but I always wondered why my bike was 'squared off', for lack of better words, instead of rounded frame corners like the Hot Dog. Suppose it could have been a prototype?
  4. Nebraska03

    Square Tubed Minibike Frame project

    @Lizardking , thank you for the info! I have no idea what engine my bike came with originally, but I am guessing it was a Tecumseh.
  5. Nebraska03

    Square Tubed Minibike Frame project

    Good Morning, I haven't posted in a long time, yet again. I still have the square tubed minibike, but haven't had the time to really do anything with it in a long while. Keeping it in the shed until I get time and space to work on it again. Just checking in. Anyone else here happen to find...
  6. Nebraska03

    Square Tubed Minibike Frame project

    05/07/2020- This evening I took the flywheel off and checked the points. They actually looked really good, but I gave them a light sanding anyway with a piece of 600 grit. Sanded the flywheel, and sanded the ends of the magneto. Put the rototiller throttle cable back on it so I could be able...
  7. Nebraska03

    Square pipe mini bike anybody ever seen one?

    I know this is an older thread, but I think I might have your minibike's "Twin." Interestingly, the previous owner of my minibike was from California, and brought it with him when he was stationed on the east coast in the military. Look up user "Nebraska03" and there's a few pics of my...
  8. Nebraska03

    Square Tubed Minibike Frame project

    Holy moly! Another one in existence? Amazing! I still have mine. Where did you find this minibike? It needs work and TLC. It ran well for a long while, but it got put out in the tractor shed when life got busy. It really needs a paint job, maybe this summer. Cleaned the carburetor...
  9. Nebraska03

    Square Tubed Minibike Frame project

    Hey, I know it's been a very long time (a couple years at least) since my last post here. I still have my square tube framed minibike, but it has unfortunately spent a good long while living in the shed, with the occasional ride around the yard to keep it running. It's been a busy/hectic past...
  10. Nebraska03

    Reposted pocketbike and lawntractor transmission ideas

    Hey, that looks cool! Neat idea! Were there any problems with the engine running/facing backwards? Which direction did the shaft have to turn to make it go forward in those 3 speeds? (I'm imagining myself assembling something and then realizing it goes forward in 1 speed, and having 3...
  11. Nebraska03

    Reposted pocketbike and lawntractor transmission ideas

    One of the main reasons I thought about using a lawn tractor transmission was that the particular one I have available has a horizontal side input shaft, instead of the regular vertical shaft on top. Here's a diagram of it here. Look for part #39, it's the horizontal input shaft. The only...
  12. Nebraska03

    Reposted pocketbike and lawntractor transmission ideas

    It probably is easier, but in some ways, that's what got me into doing this minibike project in the first place, the challenge of it all. I guess what it comes down to, I enjoy being able to tinker and and make adjustments, and see if something works or not. I think the lawn tractor...
  13. Nebraska03

    Reposted pocketbike and lawntractor transmission ideas

    Just curious if anyone has ever tried mounting a "pocket bike" transmission to an engine on a minibike to be used in place of a torque converter or jack shaft? Also, I had an idea involving a lawn tractor gearbox. (Doubt it would work, but I had to share). I have "access" (gotta go dig it up...
  14. Nebraska03

    Question about the height of a 5hp Briggs flathead.

    Yep, makes sense to me. I'll check my frame out and let you know how it looks, clearance-wise.
  15. Nebraska03

    Question about the height of a 5hp Briggs flathead.

    Yep, 12-5/8". You would have thought that there would be blueprints or drawings available online for the purpose of measuring the physical size of these engines, haha. DZLBIKE, do you know what the space from the front mounting bolt holes to the middle of the center of the sparkplug hole is...
  16. Nebraska03

    Question about the height of a 5hp Briggs flathead.

    DZLBIKE- Thanks! That does help. I guess the question now would be whether or not the spark plug lines up with that upper bar or if it's off-center from it. If it's off-centered, then it sounds like a 5hp engine would work fine for me, otherwise, the sparkplug wouldn't fit beneath the frame...
  17. Nebraska03

    Question about the height of a 5hp Briggs flathead.

    Buckeye- Thanks! I don't have a 5hp engine yet, so I don't know which air filter and carburetor it would have, but I am hoping to find something with a Pulsa-Jet carb and a fairly flat or low clearance air filter. A flo-jet would be cool because then I could make more adjustments but since...
  18. Nebraska03

    Question about the height of a 5hp Briggs flathead.

    Does anyone know offhand the general dimensions of a 5hp Briggs Flathead? (Or know a place I can find them?) The space in my frame from the plate to bolt the engine on, to the bottom of the bar that runs from the back to the front handlebar mounting tube, is 12-5/8" high. Would this...
  19. Nebraska03

    Square Tubed Minibike Frame project

    I rode the brake because it doesn't stop well unless I lean to the right a bit so I can get a little extra leverage and push the brake pedal down a bit further, otherwise there isn't enough of the scrub rubbing on the tire to get it to stop quick enough. I'm noticing the biggest difference...
  20. Nebraska03

    Square Tubed Minibike Frame project

    It runs pretty good, needs some adjustments still, and I am considering getting a rear drum brake. I let my dad take it for a spin, but he thought it rode stiff so I let a bit of air out of the back tire for him. Well, it rode smoother and helped with traction, but this definitely affected...
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