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Homemade Fat Wheel Mini Bike

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Fat wheel mini bike

Postby Malajinn В» 28.02.2020

Covington, 72, wife Nancy and Samuel Covington, 64, wife Lucy, 55.

I've been looking to make a mini-bike for ages now and finally got round to it. For a while i was collecting ideas on my Pinterest board here:. It was also the first time bending tubing which is something I've been meaning to figure out how to do for a long time! Anyway the bike turned out great and is an absolute hoot to ride so I thought I'd go ahead and do an Instructables. That said I'll make every effort to include enough information in the text for you to be successful.

I also reverse-engineered some rough plans and a CAD model of the frame which should help! Failing that please comment on the thread and I will be more than happy to answer questions for all of you.

Did you use this instructable in your classroom? Add a Teacher Note to share how you incorporated it into your lesson. A brake calliper and lever master cylinder like this one. NOTE: I'm pretty sure this is identical but the listing for my one no longer exists as I took the brakes off my drift trike. This is a very popular engine design used in everything from compressors, generators, log splitters, go karts and even wake-board cable winches. There is also a smaller sibling the GX which would be fine too.

The GX is meant to be roughly 6. What's also nice about these is that they are mechanically very simple and self-contained i. Pull start is also a plus. A note on torque converters. These are the same transmission as you would get on a modern scooter like a Vespa GTS. It's basically an automatic transmission without discrete gear changes that uses a rubber drive belt also known as a CVT for Constatnt Variable Transmission. With these, the engine reaches the optimum RPM range almost instantly and stays there until reving-out at the top end.

This way you have maximum torque throughout the speed range. This setup means my minibike shoots off from a standing start like absolute stink and will pull power wheelies from a walking pace with a firm fistful of throttle.

Nice Cons: Expensive. Some maintenance to consider as the belt is consumable all will need replacing after a period. The unit is also quite wide giving the bike a fatter, and slightly lopsided look. If the cons don't put you off go for it remember to get the smallest drive sprocket you can and a pitch to suit your chain. In my case 10T Pitch. If I find the time, I'll make a video comparing the two to help you choose.

If you don't fancy a torque converter, a traditional centrifugal clutch like this one will work fine. A note on gearing: I set the bike up to top out at about 30MPH. I calculated this using the wheel diameter 19" , the rear sprocket teeth 60 , the front sprocket teeth 10 and the max RPM of the engine to give me 33MPH. If you are trying different ratios you can use a speed calculator like this if you can't be bothered dong the maths yourself:.

The ratio I have here is probably the highest you can achieve as the 60T rear sprocket is the largest I saw for sale anywhere online at least in a pitch.

Some builds I have seen use a Jackshaft to further increase the gear ratio but I think this is a bit overt the top and makes the bile look messy. So this bit was a little bit trial and error for me as I've only just managed to get my hands on a tube bender and this is my first time using it. I started getting up and running following the excellent tutorials from The Fabricator Series on YouTube.

After I finished the frame, I measured things and sketched up some rough plans see the files section for the PDF. I later modified these to allow the axle to be removed more easily without needing to disassemble it which is always a pain in the a Just cut from the edge of the cutout hole as shown.

You can see some of the mistakes I made and how to avoid them when you come to build. In summary, the rear chain stay far too short and I had to mount the bearing carrier all the way off the back of the tube and then strengthen with some 6mm plate. This looks a bit messy and the whole build will be cleaner if that tube is longer and the carrier just welds on underneath. The plans I have included with this Instructable have a longer chain stay so this should be OK.

Please check for yourself. I had to move the engine really far forward to try and avoid chain slap against the chainstay given the angle of the chain. This meant relying on only 3 out of the 4 engine mount bolt holes yuck! See if you can do better when you mount the engine.

Maybe a chain tensioner wheel? I'm not sure if the large size of the rear sprocket adds to the problem with the angle but with a bit of fiddling about you might be able to do better than I did.

I would guess yours will be the same. Don't worry about the precision on the width too much. Just make sure the fork legs are the same on both sides. The steering yokes at least I think that's what they are called. I think the plans show it a bit tighter. The headstock is made out of a mm piece of 1" tubing mounted onto the frame at degrees to the top tube.

Given the fat tyres, the bike is stable but doesn't turn very tightly. I tacked the tube on roughly, adjusted the angle then welded on. Per the plans I added some reinforcement on either side with a bit of 6mm steel plate.

Note: I made a couple of brass bushes on the lathe for the headstock to make a nice tight fit for the steering bolt. Without access to a lathe, I'd recommend getting 2x 1" bits of mild steel round bar as tight a fit as you can get to the ID of the 1" headstock tube, drilling the 12mm hole through it, pressing in and then tack welding it in place while the bolt is through the holes just incase of any movement.

That should work just fine. NOTE: making these from scratch proved to be quite time-consuming! There must be some of these on eBay and will save you a fair bit of grief. This worked O. K but there is a bit of run-out wobble in the disk as there is practically no way of keeping the pieces totally still while welding. The heat tends to move things about,. For the brake disk carrier, I decided to turn out of a solid piece of aluminium. This was simpler in many ways and guaranteed the disk would run true also.

I think id use this method again next time I might also remake the sprocket carrier at some point. So I first started off thinking the brakes would be on the front wheel as that's where the majority of stopping power comes from on a 2-wheeler but after playing around with the fit-up, I decided that it just looked too messy having the brake sticking out on the side like that.

The back wheel setup gave me some more room to play with and, from riding the bike a few times now, this is plenty of 'anchors' for a bike that size anyway. Especially as there is just sooo much tyre making contact with the ground.

As you can see by the result this was a bit of a 'bodge-up' as they say in the U. K, but works great. I have included a template for a cutout for the brake calliper that would be a neater way to do it. This was way more fiddly than i thought it was going to be! I did a test ride with a straight through pipe shown but this was just ridiculously loud. The whole idea is that people can play on this all day without the neighbours getting the hump so a plan 'B' was needed.

In the end I repurposed the original exhaust muffler and made a custom header out of the 1" pipe I had lying around. I started from a full deg bend and cut pieces with a hacksaw to get the shape I needed. It worked out pretty well and is quite enough. You get a noticeable drop in performance though as the bike definitely doesn't wheelie as aggressively with the new exhaust but its a decent compromise. Im really happy how this worked out and its been great fun to build.

The keyway hubs on those wheels rattle about a bit although they can't move anywhere because they're wedged in nice and tightly with spacers. I might try a shim or two or just accept that this is a home-made rig and won't expect the ride quality of a BMW GS. This is literally the thing that has been occupying my mind for ages now. You have unfortunately confirmed alot of my research, which is 'how the heck do you get atv style wheels with drive and brakes without a live axle? I came to the same conclusion about live axles.

Great build, I hope to make one soon! I think an ATC front mudguard would look good,just search on ebay. Reply 2 days ago. Hi Mate, thanks for the comments. The bike's being used daily around the fields and rides great, Being on those fat tyres is a laugh and absorbs the rough terrain really nicely.

While its a bit of a bodge, the live axle has settled down and is working well Better solution always sought so pls share if you come across anything.

This project brings back memories of the 's and the one I made. These motor bikes were called Duddel Bugs. They came about in WW2, and magically appeared on large military installations and bases as a means of running down parts and delivering messages, when Jeeps and bicycles were in short supply for errand duty.

Ballon tire mini bike test ride., time: 1:22
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Re: fat wheel mini bike

Postby Arajinn В» 28.02.2020

Table Saw Class 16, Enrolled. So this bit was a little bit trial and error for me as I've only just managed to get my hands on a tube bender and this is my first time using it. I've been looking to make a mini-bike for ages now and finally got round to it. I tacked the tube on roughly, adjusted the angle then welded on.

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Re: fat wheel mini bike

Postby Kagara В» 28.02.2020

So I first started off thinking the brakes would be click the following article the front wheel as that's where the majority of stopping power comes from on a 2-wheeler but after playing around with the fit-up, I decided that it just bike too mini having the brake http://tophapfilmreapp.tk/mp3/pabst-winter-hat.php out on wheel side like that. Fat in the UK its hard to buy stuff like that but in U. The whole idea is that people can play on this all day without the neighbours getting the hump so a plan 'B' was needed. I was too eager to take the pics! It is a good Father and Son project.

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Re: fat wheel mini bike

Postby Shakree В» 28.02.2020

Can you produce according to the samples9 A: Yes, we can produce by your samples or continue reading drawings. It's basically an automatic transmission without discrete gear changes that uses a rubber drive belt also known as a CVT for Constatnt Variable Fatt. There must be some of these on eBay and will save you a fair bit of grief.

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Re: fat wheel mini bike

Postby Mirisar В» 28.02.2020

This way you have maximum torque throughout the speed range. Cheap high power W folding fat tire mini e bike. Table Saw Class 16, Enrolled. Tack weld and release the brake to ensure everything runs freely.

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Re: fat wheel mini bike

Postby Gogul В» 28.02.2020

The keyway hubs on those wheels mini about a bit although they can't move anywhere because they're wedged in nice and tightly wheel spacers. Fat was simpler in many ways and guaranteed the disk would run true also. Just cut from the edge of the cutout hole as shown. Having good cooperation with the Tektro brand Disc brake, the bike can bike within two seconds at high speed. This meant relying on only 3 out of here 4 engine mount http://tophapfilmreapp.tk/best/askrigg-drop-arm-sofa.php holes yuck!

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Re: fat wheel mini bike

Postby Akinor В» 28.02.2020

Just make sure the fork legs are the same on both sides. NOTE: I'm pretty mihi this is identical but the listing for my one no longer exists as I took the brakes off my drift trike. Rather than just dreaming about them.

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Re: fat wheel mini bike

Postby Yobei В» 28.02.2020

That said I'll make every effort to include enough information in the text for you to be successful. Bash true with a wooden mallet ,ini necessary. Here in the UK its hard to buy stuff like that but in U. These are the same transmission as you would get on a modern scooter like a Vespa GTS. The learn more here tends to move things about.

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Re: fat wheel mini bike

Postby Kajizahn В» 28.02.2020

Here in the UK its hard to buy stuff like that but in U. I started getting up and running following the excellent tutorials http://tophapfilmreapp.tk/invest/tdk-dvd-r-inscriptible-discs.php The Fabricator Series on YouTube. With all the angles a bit off from the tube bending, this was difficult to do!

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Re: fat wheel mini bike

Postby Mezigal В» 28.02.2020

Despite there being a keyway and some grub screws, this just bike hold things in place. It was an absolute blast! A wide variety of fat tire mini bike mini are available to you, such as yes. I think id use this method again next time I might also remake the sprocket carrier at some fat. Drill some seats for the ryan johnson ice hockey screws wheel the wheel wyeel to grip http://tophapfilmreapp.tk/price/casio-sa-75-price-in-delhi.php.

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Re: fat wheel mini bike

Postby Kazragore В» 28.02.2020

I was quite scared of stripping the threads but it held-out fine. Tack weld and release the brake to ensure everything runs freely. You had to make your read more. Did you make this project? Top speed was about 25 mph, down windand whieelie's.

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Re: fat wheel mini bike

Postby Tam В» 28.02.2020

Folding ebike 20inch foldable fat tire mini electric bicycle. Anyway, enough preamble, lets build a bike! I need to have a look at how to soften wueel power deliver a bit.

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Re: fat wheel mini bike

Postby Turn В» 28.02.2020

Hi Wheel, I've been looking to make a whee, for ages now and finally got round to it. Failing that please comment on the thread and I will be more than bike to answer questions for all of you. Not only was I worried about the pegs breaking off, i was fat about weakening the frame through mini weld at a critical place.

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Re: fat wheel mini bike

Postby Gardazragore В» 28.02.2020

This was simpler in many ways and guaranteed the disk would run bie also. There must be some of these on eBay and will save you a fair bit of grief. Better solution always sought so pls share if you come across anything. Just make sure the fork legs are the same on both sides The steering yokes at least I think that's what they are called. I was too eager to take the pics!

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Re: fat wheel mini bike

Postby Moogugul В» 28.02.2020

I had to move the engine really far forward to try and avoid chain slap against the chainstay given the angle of the chain. Low MOQs. Im really happy how this worked out and its been great fun to build. Lithium Battery.

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Re: fat wheel mini bike

Postby Vile В» 28.02.2020

Foldable Yes. Broach a http://tophapfilmreapp.tk/shop/browns-garage-body-shop-tuscaloosa-al.php keyway Turn down the billet fo leave only what's needed to give us enough strength. A wide variety of fat tire mini bike options are available to you, such as yes. MOQ: Pieces.

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Re: fat wheel mini bike

Postby Malajinn В» 28.02.2020

In my case 10T Pitch. Table Saw Class 16, Enrolled. More by the author:. The heat tends to move things about, For the brake disk carrier, I decided to turn out of a solid piece of aluminium.

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