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4 Stroke Bicycle Engines & Kits 4 stroke engine kits are great if you want reliability or do not want to mix your oil and gas. Learn from each other how to get the most out of your 4 stroke bicycle engine

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  #11  
Old 01-10-2017, 04:49 PM
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ultralight01 ultralight01 is offline
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Default Re: Finally, I'm settled on what I'm building.

Update. Governor removed, everything else removed.... now I have to figure out an exhaust. I have an intake but no filter to fit around it. Then I'll figure out the throttle. Now I have the rest of the parts for the bike... jackshaft, wheels, handlebars and fork, paint the frame I have, and more
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  #12  
Old 01-20-2017, 06:09 PM
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ultralight01 ultralight01 is offline
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Default Re: Finally, I'm settled on what I'm building.

I'm thinking of mounting the engine with angle iron. Two lengths of angled iron, both sandwiched with bolts onto the frame. Then I could use the protruding edges to mount the engine with two bolt holes on each side.

Might it work?

Last edited by ultralight01; 01-20-2017 at 07:59 PM.
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  #13  
Old 01-20-2017, 06:31 PM
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cannonball2 cannonball2 is offline
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Default Re: Finally, I'm settled on what I'm building.

Will work fine. Done it many times.
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  #14  
Old 01-21-2017, 12:24 AM
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ultralight01 ultralight01 is offline
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Default Re: Finally, I'm settled on what I'm building.

Very good.
EDIT:
I'm currently looking for.
Disc hub wheels (26"),
Disc brakes, rotors and brakes.
Quality Sprocket adapters and sprockets.
Mini hubs (2)
Suspension fork (1") and handlebars
The rest, including the jackshaft for gear reduction, the mounting of the engine, and lights I'll be adding or making myself.

Last edited by ultralight01; 01-21-2017 at 11:12 AM.
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  #15  
Old 01-23-2017, 07:48 PM
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ultralight01 ultralight01 is offline
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Default Re: Finally, I'm settled on what I'm building.

Ok, I'm going to try and pick up this bike: http://portland.craigslist.org/mlt/bik/5970642328.html
However I have to wait on my parents for transport. It's 40 miles away.
It's a good deal even with the aluminum frame according to research. I'll have to mount the engine softly...
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  #16  
Old 01-23-2017, 08:02 PM
TheNecromancer13 TheNecromancer13 is offline
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Default Re: Finally, I'm settled on what I'm building.

Quote:
Originally Posted by ultralight01 View Post
Ok, I'm going to try and pick up this bike: http://portland.craigslist.org/mlt/bik/5970642328.html
However I have to wait on my parents for transport. It's 40 miles away.
It's a good deal even with the aluminum frame according to research. I'll have to mount the engine softly...
I don't think that frame will fit a predator engine.
__________________
125cc lifan build 79cc predator series
There's no replacement for displacement. Bigger is better, and too much is never enough.
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  #17  
Old 01-23-2017, 09:19 PM
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ultralight01 ultralight01 is offline
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Default Re: Finally, I'm settled on what I'm building.

Point. These frames go from 14"-22". I'm emailing to ask what size it is.
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  #18  
Old 01-26-2017, 03:12 PM
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ultralight01 ultralight01 is offline
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Default Re: Finally, I'm settled on what I'm building.

Continuing with my steel Schwinn frame.
Got my battery today
IMG_4118.JPG
It's 4.5Ah and 12 volts. I'll be using two step down converters to power a (purchased) turn signal kit that runs on 3v, El Stip for light effects, and two 12v 27 watt fog lights. I'm also adding an alternator. Alternators are an interesting thing to me, no one seems to like adding them to their bikes because of cost and expense. I've found a way to add one for about $40 that will be plenty sufficient to recharge the battery.

I feel like this thread should be renamed "My 79cc MTB build," if anyone wants to do that for me.

The battery weights over 7 pounds! It's like a brick of lead. I'm not used to these things.
I'm working on mounting the engine today.

I've ordered a tank, fuel hoses, a valve cover breather, and a 203mm rotor and hydraulic brake.

Last edited by ultralight01; 01-26-2017 at 03:15 PM.
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  #19  
Old 01-26-2017, 04:25 PM
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ultralight01 ultralight01 is offline
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Default Re: Finally, I'm settled on what I'm building.

IMG_4121.JPG

Here's the Avid Hydraulic brake. It's brand new of course. $24 shipped on eBay. Hydraulic disc brakes are not an expensive prospect if you have wheels with bolt holes!
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  #20  
Old 01-26-2017, 08:08 PM
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ultralight01 ultralight01 is offline
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Default Re: Finally, I'm settled on what I'm building.

Today I made the Mounting plate out of steel, decided on engine placement and decided on the paint job. I'll post pictures on the mounting plate tomorrow. I need to weld a couple of bends to reinforce it.
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