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DIY Home Built Motorized Bicycle (non kit) Post all about your home built rides here. Weedwacker motors, lawn mower engines ect. This area is for non kit builds

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  #11  
Old 04-29-2017, 07:09 PM
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xXNightRiderXx xXNightRiderXx is offline
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Default Re: Twin Pocket Bike Engines Build

Well, this is interesting. Admittedly more interesting than Night Prowler. I was thinking, if you offset the top engine so its a bit more forward, you can still run a single chain. Just run it from the top engine, to the bottom engine, around the BB, and back up to the top engine. If you've already tried this, please disregard this suggestion.
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  #12  
Old 04-29-2017, 08:35 PM
5-7HEAVEN 5-7HEAVEN is offline
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Default Re: Twin Pocket Bike Engines Build

Quote:
Originally Posted by xXNightRiderXx View Post
Well, this is interesting. Admittedly more interesting than Night Prowler. I was thinking, if you offset the top engine so its a bit more forward, you can still run a single chain. Just run it from the top engine, to the bottom engine, around the BB, and back up to the top engine. If you've already tried this, please disregard this suggestion.
Each chain would have to wrap around the engine sprockets a goodly amount, much like the Chevy V8s' alternator belt wraps around the water pump, crank and alternator pulleys. I don't believe there's enough room in the midframe to position the engines in that layout you suggested.
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  #13  
Old 04-30-2017, 09:01 AM
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Ludwig II Ludwig II is offline
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Default Re: Twin Pocket Bike Engines Build

Tensioning such a length would be a hobby in itself.
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  #14  
Old 04-30-2017, 02:38 PM
5-7HEAVEN 5-7HEAVEN is offline
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Default Re: Twin Pocket Bike Engines Build

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Originally Posted by Ludwig II View Post
Tensioning such a length would be a hobby in itself.
I was thinking that.

I entertained the idea of running a v-belt(Plan B) or a more effective serpentine pulley system(Plan C). However, since I already have everything to install a T8F pocket bike chain drive (Plan A), it makes sense for me to run the chain.
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  #15  
Old 05-07-2017, 01:41 PM
5-7HEAVEN 5-7HEAVEN is offline
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Default Re: Twin Pocket Bike Engines Build

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Originally Posted by 5-7HEAVEN View Post
As a chain guard for the PB sprockets and chains, I'm thinking a timing cover from a 1970s big-block Chevrolet(BBC) engine MIGHT fit!
I'll look for a used one to trial-fit it.

Updated on 5-6-17:
I bought a new BBC timing cover for $15.00.
IT FITS LIKE A GLOVE!
The cover's upper hole lines up with the top engine's transmission's upper bolt. It completely covers both chains and chain ring sprockets.
I might drill lightening holes, or not.
I'm in sunny California for a month-long vacation. I'll see if my son can post a picture of the BBC cover mounted on my bike.
It looks BOSS!
Now I'm wondering if I should buy a chrome timing cover.
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  #16  
Old 05-07-2017, 04:16 PM
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Ludwig II Ludwig II is offline
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Default Re: Twin Pocket Bike Engines Build

If the cover''s plastic there are companies who will do vacuum plating of it.
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  #17  
Old 05-07-2017, 04:43 PM
5-7HEAVEN 5-7HEAVEN is offline
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Default Re: Twin Pocket Bike Engines Build

Chrome parts for Chevy engines are cheap.
I can buy a BBC chrome timing cover for $20. I wasn't sure it would fit, so I bought the plain one, which I might drill lightening holes.
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Last edited by 5-7HEAVEN; 05-07-2017 at 04:53 PM.
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  #18  
Old 05-08-2017, 06:36 PM
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Default Re: Twin Pocket Bike Engines Build

I'm 72, one of my builds weighs 85 lbs. Pulled my back flipping it over. Good part is my back reco
vered after a week! Keep rolling !

Quote:
Originally Posted by 5-7HEAVEN View Post
I've been working on my new project motorized bicycle for the past couple of months. The bike I build must be light enough for me to carry upstairs. My current ride, Snow Tiger, weighs 70lbs; it's no problem getting it into the loft.

I'm 70 years old, so my bikes have to be light enough for me to lift and carry a distance.

My current ride Snow Tiger(ST) weighs 70lbs.
My new project The Blue Twins weighs 61lbs. so far.
It'll end up a few pounds heavier than ST.


I'll post pics and share more.

I was installing a Tanaka 47R, ala mid-frame and shift kit.

Yesterday morning, the Tanaka was removed, making room for TWO pocket bike engines!!

Mid-frame twins with shift kit!
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  #19  
Old 05-08-2017, 07:19 PM
5-7HEAVEN 5-7HEAVEN is offline
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Default Re: Twin Pocket Bike Engines Build

Thanks for the encouragement. My current ride Snow Tiger weighs 70lbs. I can easily push it up flights of stairs.....for now.
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