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Smith Motor Wheel... help please!


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  #1  
Old 03-16-2014, 02:29:53 PM
jopeter jopeter is offline
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Default Smith Motor Wheel... help please!

Can anyone please help....I am trying to figure out the method of attaching the SMW to the bike frame . Is it possible that some one could send an image or photo of the method . The part that I can not understand is how the SMW wheel can tilt as the bike leans either side . Thanks .
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Old 03-16-2014, 07:16:45 PM
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Default Re: Smith Motor Wheel.......help please!

On the ones I have seen The wheel and the engine are one unit. This unit replaces the rear wheel. So any time you lean the bike into a turn the whole bike leans including the smith motor wheel on the back. Bill K

I have seen some pictures on this site. If you do a search you should be able to find them.
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Old 03-16-2014, 07:28:12 PM
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Default Re: Smith Motor Wheel.......help please!

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Originally Posted by oldproff View Post
On the ones I have seen The wheel and the engine are one unit. This unit replaces the rear wheel.
The Smith Motor Wheel does not replace the rear wheel of the bike. It is added on to one side at the rear.

It simply has a hinge point at the front of the mount. As the bike leans one way or the other, the motor wheel just pivots up or down at the hinge point and leans with the bike.


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Old 03-16-2014, 07:48:38 PM
jopeter jopeter is offline
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Default Re: Smith Motor Wheel.......help please!

Thanks Oldproff ,your right ,my problem is the attachment that allows the wheel to lean with the bike . I have this alloy casting ,the pattern was made from an original SMW part. The picture shows this part but it is not clear [to me ] how it all works ..........thanks for your help ,anything greatly appreciated.
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Old 03-16-2014, 08:03:27 PM
jopeter jopeter is offline
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Default Re: Smith Motor Wheel.......help please!

Thanks Junkoligist.....that pretty well explains it . At first ,looking at your photo I could not see how the wheel leaned but I now see a pivot point underneath . I assume the stay coming down from the upper part of the bike frame is a slidng fit . My casting needs modification . Unfortunately my horns were also cast and require some machining . I notice on the rear horn there is what I assume is an oil filler plug.
Thanks for your help.
I have just got my Berling magneto back after a coil rewind .I had the cylinder rebored and have made a new piston and rings ..........so hopefully it will be a goer soon.
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Old 03-16-2014, 08:24:36 PM
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Default Re: Smith Motor Wheel.......help please!

The stay is not a sliding fit. It is rigid. The motor wheel cannot and doesn't need to lean independently of the bike. The mount is rigid to the bike and there is only one pivot point at the front of the horn, which is parallel to the road surface when the bike and the motor wheel are standing straight up. This pivot point not only allows the motor wheel to follow the road surface independently of the bike, but also allows the bike to lean. When the bike leans, say to the left, the pivot point is no longer parallel to the road surface and when the bike leans, the motor wheel goes with it and leans the same way. The pivot point allows this by letting the motor wheel hinge upward as the pivot point gets closer to the road as the bike leans. This is hard to explain in words, but once you see it with your eyes, you won't believe how simple it is.
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Old 03-16-2014, 10:25:09 PM
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Default Re: Smith Motor Wheel.......help please!

Thanks when my answer is not correct I always learn something new. Bill K
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Old 03-16-2014, 11:03:52 PM
Fifty7ChevyNut Fifty7ChevyNut is offline
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Default Re: Smith Motor Wheel.......help please!

they also made a scooter using the motor wheel as well as the buckboard car.
the wheel actually runs off the cam, and there is no clutch option. you kill the engine when you want to stop, and restart on the bike and scooter, the buckboard has a lift mechanism.
i recently got some schoolin from a fellow in va, he has a complete scooter, two buckboards, and 5 or 6 engines. there are actually 4 or 5 engine configurations, and parts are not always interchangeable.
don
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Old 03-17-2014, 08:24:47 PM
jopeter jopeter is offline
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Default Re: Smith Motor Wheel.......help please!

Thanks everyone for your responses . Junkologist ,I think I have the idea now ,as you said ,simple! Can you explain the item I have arrowed on the image ,what is it's purpose .......thanks again everyone.
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Old 03-17-2014, 08:48:43 PM
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Default Re: Smith Motor Wheel.......help please!

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Originally Posted by jopeter View Post
Thanks everyone for your responses . Junkologist ,I think I have the idea now ,as you said ,simple! Can you explain the item I have arrowed on the image ,what is it's purpose .......thanks again everyone.
There is also a vertical pivot point that allows the motorwheel to caster right or left as the bike goes around curves. I didn't mention it before since it has little to do with the leaning of the bike. If it could not caster, when the bike would go around a curve, the motorwheel would want to skid sideways across the road surface. The spring you see is a centering and stabilizing device for the caster function. Ever see a wobbly caster wheel on a shopping cart? That spring prevents that from happening.
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Old 03-18-2014, 06:41:22 AM
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Default Re: Smith Motor Wheel... help please!

Thanks Mike ......I think I understand ,once I start to build and assemble I am sure it will become obvious . I will be away fromthe project for a few days ,going to a show . Looking forward to getting back to it . Hope you dont mind if I contact you if I have problems .
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Old 03-18-2014, 07:07:20 AM
ronald shane newport ronald shane newport is offline
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Default Re: Smith Motor Wheel... help please!

yes peter while you are in brookton john and Lesley smith will
be there john has one in usable condition he had it at the fairbridge
rally.
good luck shane.
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Old 03-18-2014, 02:40:54 PM
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Default Re: Smith Motor Wheel... help please!

Shane I was hoping that would be the case ..........they must have bought it from Malcolm Henning ,he restored it originaly . Good chance to get some close photos of the details I want .Junkologist has been very helpful .
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Old 03-18-2014, 11:36:36 PM
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Default Re: Smith Motor Wheel... help please!

Glad to help.
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