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Motorized Bicycle General Discussion All topics regarding bicycles with engines.

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  #11  
Old 12-25-2016, 12:45 AM
StevenMain StevenMain is offline
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Default Re: Home built full suspension custom frame pics!

A reed valve china doll. I've stuff the case, tried every porting configuration imaginable, run a YZ85 modified expansion chamber and it runs 39 mph on a 44 tooth on the flat. With a shift kit over 50 should be cake I'd imagine. How I do the shift kit is the genius part... stay tuned lol
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  #12  
Old 12-28-2016, 10:34 AM
StevenMain StevenMain is offline
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Default Re: Home built full suspension custom frame pics!



I changed the seat post angle to allow for a lower seat.

If this bike BELOW doesn't sell in a few days for $475 I will use its built engine as a donor.



I will be mounting the engine.... upside down and backward, to the frame with welded motor mounts. I will have to run the engine in reverse to power the bike but it allows me to run a shift kit without a power robbing jackshaft and 3 chain setup. if I mount the engine to welded motor plates, upside down and backward it will also serve as the frame's downtube just like on a sportbike. If it works on the prototype Im going to transfer it to this bike

which ill buy specifically for this purpose.

Last edited by StevenMain; 12-28-2016 at 10:37 AM.
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  #13  
Old 12-28-2016, 01:41 PM
KCvale KCvale is offline
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Default Re: Home built full suspension custom frame pics!

Quote:
Originally Posted by StevenMain View Post

... I will be mounting the engine.... upside down and backward, to the frame with welded motor mounts.
I will have to run the engine in reverse to power the bike but it allows me to run a shift kit without a power robbing jackshaft and 3 chain setup.
Wow, that is some plan you have there Steve...
Re-Engineer everything so you don't have to suffer the devastating loss from one extra short chain!

A bicycle has 1 chain, a direct drive kit has 2, a shifter has 3.
When you have gears losses mean nothing bud ;-}



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  #14  
Old 12-28-2016, 02:55 PM
StevenMain StevenMain is offline
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Default Re: Home built full suspension custom frame pics!

You're sort of missing the point. It's really easy to make the engine run backward... litterally one mod. I can avoid the extra chain and complication and maintenance. Also I won't need a down tube because the engine will serve as the frames downtube. I won't need an expensive shift kit either, just the freewheel and sprockets and crank arms.

Less cost, less complexity, and thinking outside the box to utilize new frame styles and such.
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  #15  
Old 01-02-2017, 01:28 AM
StevenMain StevenMain is offline
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Default Re: Home built full suspension custom frame pics!

Update, frame mocked up after sandblasting and smoothing the joints out with Epoxy for that seamless one piece frame look. Gave me an idea.. Going to paint the frame Digital Urban MultiCam

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  #16  
Old 01-02-2017, 10:07 AM
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ultralight01 ultralight01 is offline
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Default Re: Home built full suspension custom frame pics!

Sweet. It needs a better front shock in my opinion. If you lengthened the top tube things would be much easier to fit and it would ride and look better. That or a long swinngarm and a long/tall shock
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  #17  
Old 01-02-2017, 05:58 PM
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scratchbuilder scratchbuilder is offline
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Default Re: Home built full suspension custom frame pics!

My first dual suspension I had to redo also. The #2 got cut and redone also. Now I'm thinking along the lines of this type(pic) but, mine will not look as sweet as this one does.

Last edited by scratchbuilder; 01-02-2017 at 06:01 PM. Reason: add pic
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  #18  
Old 01-02-2017, 06:38 PM
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ultralight01 ultralight01 is offline
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Default Re: Home built full suspension custom frame pics!

Because it's electric... and electric is so clean and hideable.
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  #19  
Old 01-03-2017, 12:39 AM
StevenMain StevenMain is offline
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Default Re: Home built full suspension custom frame pics!



Ok, I got the motor mount plates welded on, then I cut my chamber head pipe and made it fit the new bike, added 1" to lower the power band some too since it takes a very high RPM to hit the YZ85 pipe. I have to route the exhaust after the chamber still, and make an intake that will hold the carb level to the reed block.. Then make the engine run backward and link it to the freewheel. :-)

Fuel tank isn't decided on yet it's just sitting there.
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  #20  
Old 01-03-2017, 01:36 AM
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ultralight01 ultralight01 is offline
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Default Re: Home built full suspension custom frame pics!

Disc brakes, my man
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