Author Topic: Motorized Bicycle  (Read 1945 times)

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Offline 85RZwade

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Re: Motorized Bicycle
« Reply #15 on: March 22, 2021, 08:57:54 AM »
Excellent use of the water bottle mounts!
Rubber side down!

Online m in sc

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Re: Motorized Bicycle
« Reply #16 on: March 22, 2021, 03:42:50 PM »
that thing is a riot. Id venture to say the rear sprocket may not hold up but its def interesting.

Offline 85RZwade

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Re: Motorized Bicycle
« Reply #17 on: March 23, 2021, 12:45:13 AM »
I have too many projects as it is...but I also have some extra chain saws and bicycles  :dapper:
Rubber side down!

Offline JB Weld

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Re: Motorized Bicycle
« Reply #18 on: March 24, 2021, 11:32:34 PM »
Thanks for the comments! Already experiencing so me issues. Doesn't want to start now. I think it lost spark. And the mounts are a bit flimsy, so I'll have to beef them up a bit.

Updates will be slow as I have other projects that are more important....to my wife  :haw:

Offline smokah

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Re: Motorized Bicycle
« Reply #19 on: July 14, 2021, 11:57:42 AM »
My mad scientist friend is going a bit further with his version of this. 125cc pit bike engine mounted to a stretched bmx bike frame.

Offline smokah

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Re: Motorized Bicycle
« Reply #20 on: July 14, 2021, 11:59:23 AM »
He's still boxing the rear. Custom sprocket will be welded to the rear rim.

Offline 85RZwade

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Re: Motorized Bicycle
« Reply #21 on: July 15, 2021, 09:05:11 AM »
That's a clever wheel alignment jig he's fashioned
Rubber side down!

Offline Clem710

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Re: Motorized Bicycle
« Reply #22 on: July 16, 2021, 02:08:58 AM »
Redid one of these that was built from a kit a few years back.  Things that I remember were important were chain alignment and tension, the kits come with a fixed tensioner and since the gearing is clamped/sandwiched to the left side spokes, its tricky to get it to run true and circular.  In the kit I ran lots of oil and tuned accordingly 20:1 iirc.

Brakes are important, its not much more weight or speed but it is more of both, make sure theyre working good just incase that kill switch doesnt work.  The kits have a hand clutch thats used for starting, has a latch to hold in as well in case you are just pedalling.

I got mine going about 35 by the time I was done, no big mods just getting everything as good as it could be.  Rubber mounted engine was smooth to about 20, terrible after that but plenty of go.  Big ass beach cruiser, truckin along:)

I found it fun but it was a heavy ass bicycle and not a very good scooter and I didnt need it at all so it went to someone more transportationally challenged.  Yours should be fun as well and maybe alot better if it runs smooth at the top end, Id guess that the motor is a good bit lighter so it might be more bicycle like.  20 without pedalling and that sweet sound is pretty good, especially if you have favorable laws.

Offline JB Weld

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Re: Motorized Bicycle
« Reply #23 on: July 28, 2021, 09:59:27 PM »
The laws here allow motorized bicycles, although they have to have pedals and lights that operate off of the engine's charging system. No way I'll try to run lights off of this and don't think the police will be worried about how they are powered.

This thing is shelved until winter. Remodeling is constant and now that my wife's father is in a nursing home most of our time is dedicated to caring for his home and acreage.

Offline smokah

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Re: Motorized Bicycle
« Reply #24 on: August 31, 2021, 02:57:49 PM »
Not to hijack... but it's done, and still rim brakes.

Offline quocle603

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Re: Motorized Bicycle
« Reply #25 on: September 01, 2021, 06:05:01 PM »
check out 2 stroke stuffing on youtube. he went crazy on his motorized bike build. he's currently onto bigger and better things now.
Do not underestimate the power of a two-stroke.

1975 Yamaha RD350 (modified), 1973 Yamaha RD350 (stock), 1971 Suzuki T500, 1981 Yamaha XS650 HS2, 1982 Honda MB5, 1980 Puch Maxi, 1979 Puch Magnum, 1993 Tomos Bullet, 2003 Malaguti Firefox F15 LC