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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 10-03-2014, 10:02 PM
curtisfox curtisfox is offline
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Default Re: Thread for alternative engines

Onan,Kohler, and Briggs all had flat top oposed , Onan is no longer made in fact no longer make the flat top engine. Onan is really expensive to redo or even to get parts.....Curt
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  #12  
Old 10-04-2014, 01:02 AM
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Intrepid Wheelwoman Intrepid Wheelwoman is offline
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Default Re: Thread for alternative engines

I used to own an Onan flat twin which was used to drive an ex-army generator set. I had a Norman flat twin too, but when my marriage broke up my ex sent them both off to the scrapper along with a lot more of my treasures.



Sorry Ludwig I even had a handbook for the Norman, but that didn't survive my marriage either.
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  #13  
Old 10-07-2014, 10:50 AM
Citi-sporter Citi-sporter is offline
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Default Re: Thread for alternative engines

I keep thinking a Ryobi 825r 4-stroker would make a nice little bike assist engine. And I'm mean 'assist' in a generous way because these are pretty limited in their overall power levels. I'm guessing they're not much over 1 hp.



They are so prevalent at repair shops because they tend to stop running on E10 gas, it would be interesting to have the skill and machine tools to make a boxer twin 52 cc engine out of a pair of cylinders/pistons from the Ryobi
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  #14  
Old 10-07-2014, 12:32 PM
curtisfox curtisfox is offline
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Default Re: Thread for alternative engines

Quote:
Originally Posted by Citi-sporter View Post
I keep thinking a Ryobi 825r 4-stroker would make a nice little bike assist engine. And I'm mean 'assist' in a generous way because these are pretty limited in their overall power levels. I'm guessing they're not much over 1 hp.



They are so prevalent at repair shops because they tend to stop running on E10 gas, it would be interesting to have the skill and machine tools to make a boxer twin 52 cc engine out of a pair of cylinders/pistons from the Ryobi
That's a awesome idea,have to give it some thought. I have a 4stroke Troy that I use for yard work and love it so smoth and quiet.......Curt
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  #15  
Old 10-08-2014, 09:59 AM
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Lightning Boy Lightning Boy is offline
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Default Re: Thread for alternative engines

I'll be looking in on this one as well, Ludwig. Right up my alley. Best of luck!
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  #16  
Old 10-08-2014, 05:47 PM
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Ludwig II Ludwig II is offline
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Default Re: Thread for alternative engines

In a few weeks I'll be over in Norfolk to pick up an ancient bicycle, and a possible engine for it or another bike, but we won't know what it is until the accumulated layers of tools and bits are dug through to reach it.
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  #17  
Old 10-08-2014, 05:51 PM
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Intrepid Wheelwoman Intrepid Wheelwoman is offline
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Default Re: Thread for alternative engines

Oooooo the joy.... the anticipation....
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  #18  
Old 10-08-2014, 05:53 PM
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Ludwig II Ludwig II is offline
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Default Re: Thread for alternative engines

I just thought of something. Those little 2 stroke "throwaway" generators that give 650w or thereabouts, they have a 63cc reed valve engine in them, optimised for torque. If somebody's burnt out the lecktrickery side by asking too much of it, that's a nice little unit in there.

From the 650 Sumo manual:
780w 2 STROKE GENERATOR SML34GEN

TECHNICAL DATA

AC output 230Vac ~ 50Hz
Rated power 0.65kVA
Peak power 0.78KvA
Phase Single
Power factor cosų=1
Displacement 63cc
DC output 12V, 8.3A
Motor 1.8HP, 2 stroke
Fuel tank capacity 4.2L
Fuel type 50:1 or 40:1 of unleaded petrol and two stroke oil
Spark plug type F5TC

Last edited by Ludwig II; 10-08-2014 at 06:12 PM.
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  #19  
Old 10-11-2014, 08:13 PM
mat_man mat_man is offline
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Default Re: Thread for alternative engines

The most common version in the USA is the Harbor Freight 63CC 2 stroke generator.

Unfortunately the generator housing is cast as part of the engine crankcase. (see pics)
The shaft out of the engine is taper fit to the generator section.

Harbor Freight 63CC generator manual
http://manuals.harborfreight.com/man...6999/66619.pdf
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  #20  
Old 10-11-2014, 10:45 PM
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Intrepid Wheelwoman Intrepid Wheelwoman is offline
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Default Re: Thread for alternative engines

That's a pity, - nice ball bearing race on the mains though.
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