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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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  #1  
Old 06-23-2016, 06:52 PM
Tom from Rubicon Tom from Rubicon is offline
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Join Date: Apr 2016
Location: Rubicon, Wisconsin
Posts: 55
Default 79cc Sportsman Flyer build

The list as I up date it.
Sportsman Flyer Drop Loop frame (Black).
Sportsman Flyer Engine Mount System received from Pat Dolan. Seek no more.
It is the bomb! A better system for mounting a Pred. engine cannot be devised.
Sportsman Flyer fuel tank with tank graphics and toolbox arrived 10/14/16. You pay the price but you get quality that exceeds my expectations. Well done Pat. The clamp straps have over the top added detail. (These are not conduit clamps.)
79cc predator engine. Governor removed. Oriented vertical with Pat's system had to drill and tap 1/2 NPT on other side of the engine side case
PZ19 Mikuni clone + air filter and fuel filter
On Pat Dolan's recommendation Sunlite springer is the setup to use with a Flyer. Done.
26" front wheel with Sturmey Archer drum brake.
26 rear free wheel, Sturmey Archer single gear cassette.
Continental 26x2 Cream Retro Ride tires.
Q- matic transmission for 79cc Predator. (Disassembled 6/25/16 to have mounting plate remade of 1/4" 6061 T6 alum. to make it easier for a vertical engine orientation)

56 tooth rear sprocket and #41 chain for drive
3 piece sealed bearing crankset, Italian moped cranks, and 25 tooth chain sprocket.
Wald steel fenders.
Wald 867 handle bars
To do the build I have built a bike stand that mounts to the chain stays @ 36" high. just like the one I worked with at a Schwinn Shop in the late 60's and early 70's
Things may get deleted to make a more cohesive thread.
Any and all responses, or links to resources that carry this project forward in a spirit that advances our hobby/passion are welcome.
Tom from Rubicon,WI

Last edited by Tom from Rubicon; 10-15-2016 at 06:00 PM. Reason: continued updates to the day I ride it.
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Old 06-23-2016, 06:56 PM
Tom from Rubicon Tom from Rubicon is offline
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Default Re: 79cc Sportsman Flyer build

My first post is to create interest. If anyone can direct me to a maker of a rear facing intake manifold please do.
Regards,
Tom from Rubicon,WI
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  #3  
Old 06-23-2016, 07:58 PM
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MotoMagz MotoMagz is offline
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Location: Michigan
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Default Re: 79cc Sportsman Flyer build

Quote:
Originally Posted by Tom from Rubicon View Post
My first post is to create interest. If anyone can direct me to a maker of a rear facing intake manifold please do.
Regards,
Tom from Rubicon,WI
Go to swap shop and contact FfV8 for manifolds.
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Old 06-26-2016, 09:11 AM
Tom from Rubicon Tom from Rubicon is offline
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Default Re: 79cc Sportsman Flyer build

FfV8 ? I am not understanding.
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Old 06-26-2016, 09:21 AM
Tom from Rubicon Tom from Rubicon is offline
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Default Re: 79cc Sportsman Flyer build

FfV8 ? I am not understanding.
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Old 06-26-2016, 11:47 AM
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MotoMagz MotoMagz is offline
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Default Re: 79cc Sportsman Flyer build

That is his forum name. So he started the thread in the swap shop.
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Old 06-26-2016, 05:53 PM
Tom from Rubicon Tom from Rubicon is offline
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Location: Rubicon, Wisconsin
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Default Re: 79cc Sportsman Flyer build

Thanks for the reply MotoMagz,
I copy and pasted his forum name in search @ the swap shop forum. Bingo! Posted a massage to him and hoping for a positive response to my inquiry.
Time will tell.
Thanks for the help.
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Old 06-26-2016, 06:36 PM
Tom from Rubicon Tom from Rubicon is offline
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Join Date: Apr 2016
Location: Rubicon, Wisconsin
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Default Re: 79cc Sportsman Flyer build

Sorry I haven't any photos here yet, but then again I am dealing with another learning curve. My only other build is a HuaSheng 49cc powered Huffy-Davidson from a Bikeberry kit.
This last weekend by fits and starts I disassembled an EZ-matic transmission.

1/4" 6061 T6 plate had been purchased, so I layed out a pattern of the stock mounting plate and the power in put and power out put positions.
Band sawed the outline, centered and drilled a 5/8" power in put hole.
Made 4, 5/16-24 transfer screws to transfer the engines hole pattern with the engine vertical and the transmission 90 degrees horizontal. With transfer screws in the block
Slid the mounting plate onto the transfer screws, and verified 90 degrees. Striking the plate to transfer the hole positions.
Back out to the shop re-struck the prick marks to help a drill follow center.
The rest was Duck Soup. Drilled and counter sink’d for flat head screws.
Back in the house, dropped the plate on over the crankshaft. Screws all fell right in.
Next is belt sanding to true the saw cuts and transferring the drivetrain components to be mounted up for final assy.
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Old 07-08-2016, 10:17 AM
Tom from Rubicon Tom from Rubicon is offline
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Default Re: 79cc Sportsman Flyer build

I did a few PM's with FFV8,
Resulting in the purchase intake manifold and a flanged exhaust stub that will go on my 79cc Predator.
Next will be acquiring a 19mm Mikuni carb.
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Old 07-10-2016, 10:12 AM
Tom from Rubicon Tom from Rubicon is offline
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Location: Rubicon, Wisconsin
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Default Re: 79cc Sportsman Flyer build

A package from FFV8 arrived Saturday, that was fast! Any one have a recommendation of which Mikuni carb would work best with a 79cc Predator? Or should I keep the stock carb?
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