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Motorized Bicycle General Discussion All topics regarding bicycles with engines.

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  #881  
Old 03-11-2014, 10:10 PM
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Wickedest1 Wickedest1 is offline
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Default Re: Motorized Bicycle Take a Tip...Leave a Tip

story to tip:

I have a small shaft on my fd bike, and needed a larger surface area to push against, so with the shaft being so small, I took the shaft collar I needed, found its o.d. and bought another collar with the i.d. equivalent to the o.d. of the needed one, but take it to your grinder opposite the set screw and make a small flat surface for the outer collar to lock onto

tip:

stacking shaft collars to equate a larger surface area, by grinding a flat on the smaller to lock the larger in place.

oh and p.s. when you need something that screws together to stay together, there is no such thing as too much Loctite.
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  #882  
Old 03-14-2014, 02:02 PM
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Default Re: Motorized Bicycle Take a Tip...Leave a Tip

need a pillow block bearing with a small size id bearing but cant find them?

yea me too...

so im sitting here and it hits me,

skateboard wheel sandwiched between a conduit clamp and a piece of flat stock steel, shave a flat onto the skateboard wheel, drill a hole in top of conduit clamp, flat part of wheel down on stock, clamp over top, screw through top of clamp into skate wheel...

bing, done

thanks for looking
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Last edited by Wickedest1; 03-14-2014 at 08:29 PM.
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  #883  
Old 03-15-2014, 02:35 AM
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Default Re: Motorized Bicycle Take a Tip...Leave a Tip

Now that right there is an awesome idea!
One can get bearings for those that can spin crazy fast and support very impressive loads, considering their size. The wheel will also absorb vibrations too. Alot of them are made of polyurethane.
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  #884  
Old 03-16-2014, 12:43 AM
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Default Re: Motorized Bicycle Take a Tip...Leave a Tip

Here's a tip for the welders out there.


Be sure where your ground cable is when welding on your bikes. This rear brake cable was melted in about five seconds when I struck an arc on the frame with the ground clamp on the swingarm, The current took the cable as the ground path and instantly roasted it!
Always ground close to your weld!
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Last edited by maniac57; 03-16-2014 at 12:45 AM.
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  #885  
Old 03-16-2014, 03:21 AM
MEASURE TWICE MEASURE TWICE is offline
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Default Re: Motorized Bicycle Take a Tip...Leave a Tip

Path of least resistance or something? Looks like black liquorish.

Mostly I thought of was removal all together of fuel tank.

I have left the engine on the frame and it has oil in it and did welding a few times when it was about 2 feet from engine.

I have always put the ground clamp just inches from the weld area. Then I also take a large piece of steel sheet and put it as a barrier to stop sparks from getting on engine.

MT
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  #886  
Old 03-24-2014, 08:47 AM
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Default Tube bending

I've seen where others have had trouble kinking or crushing the tubing when making a sharp bend, even when filling the tube with sand. My solution was to shove a tight fitting hardwood dowel into the tube at the site of the bend. Worked like a charm.

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  #887  
Old 03-24-2014, 08:43 PM
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Default Re: Tube bending

Quote:
Originally Posted by wret View Post
I've seen where others have had trouble kinking or crushing the tubing when making a sharp bend, even when filling the tube with sand. My solution was to shove a tight fitting hardwood dowel into the tube at the site of the bend. Worked like a charm.

Another good way is to cap the ends, fill it with water, and freeze it.
Once it's frozen, it will bend without kinking much better.
The problem with sand is you have to keep it sealed to work. Once water freezes, capping is no longer needed as the ice holds itself in, unlike sand which will move under pressure.
Even better, fill it with sand, then wet and freeze it.
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  #888  
Old 04-11-2014, 08:33 PM
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Default Re: Motorized Bicycle Take a Tip...Leave a Tip

Here's a tip for anyone needing a shoulder bolt to properly mount a skateboard wheel as a chain idler or guide.
The allen head button capscrews used for holding V-brakes arms and also for bolting the shock in to cheap full suspension bikes.
The shock bolt and capscrew is exactly the right length to fit a skateboard wheel to a flat surface perfectly with two washers. This prevents the bearings from crushing into the soft wheel when tightened and is mandatory for this style idler to work.
Plus they are everywhere in junkyards and partsbins.
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  #889  
Old 04-12-2014, 06:32 AM
MEASURE TWICE MEASURE TWICE is offline
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Default Re: Motorized Bicycle Take a Tip...Leave a Tip

I found this ehow on how to use my rear wheel from a coaster brake type kids bike wheel.

I was needing two 10 inch diameter inflatable tires to use as big training wheels on the motor bike meant for trail riding, to temporarily convert for parade use as a California Sheepshead Fish.

I will have to go under 5mph and still keep balance. With a metal sketon frame and a fabric cover, it may get damage or myself hurt if it were to fall over, so training wheels as it putts along is my answer.

I have to see what washers are necessary to fill some gap left when removing some parts like the shoes to do the conversion so I have the equivalent of two front free wheels.

Attached picture has engine and gas tank removed as required when I recently welded parts on frame. Extra handle bars are temporarily in place. Trail riding it is best to not use ape hangers.

http://www.ehow.com/how_8756581_conv...freewheel.html

MT

http://motorbicycling.com/showthread...=29678&page=17

The build continuing

http://motorbicycling.com/showthread.php?t=53832

Trail riding and out on USDA Forest Service Roads where Lic. OHV OK'ed
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File Type: jpg IMG_5656.JPG (769.8 KB, 38 views)

Last edited by MEASURE TWICE; 04-12-2014 at 06:50 AM.
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  #890  
Old 04-30-2014, 07:20 AM
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Default Re: Motorized Bicycle Take a Tip...Leave a Tip

I have a tip for a quiet exhaust. I just drilled a bunch of holes to perforate the long pipe inside the muffler, then wrapped it loosely with some left over FMF 2 stroke packing, then stuck it back in. HUGE reduction in noise. The bag I had did a few motorcycles, and still has enough for 5 bicycles. Its smiles instead of dirty looks now.
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