My Trike build

[Cotmullion]

Me and a mate started on a little trike build today. Got a Suffolk Punch (British cylinder mower engine) engine, a 52 tooth axle and a pair of 16x6.5" rears. Got a nice set of 20 inch chrome ape hangers in the workshop which would look awesome on it too. Live rear axle should be wild too

 

[dave1701]

Cool

 

[tykenfitz]

Can you put some pics/info on that motor?

Also, how did you connect that front bike fork just weld the existing tube to the frame?

Thanks!

 

[bighead]

You may want to move your frame up on the front fork tube. Then add a very large gusset from the fork tube to the frame.

You need some kind of gussets in there. You knew this right?

Great job looks like it will work.

Ps you should find one of the old shwing bike springer forks. Along with the ape hangers it would look kewl.

 

[KieranM]

we have a suffolk punch motor, they were put on cylinder mowers from 1950 on and have a deadly clutch. They went quite for quite a while. All there mowers were called after horses, colt/punch. Qualcast took over them and now there with bosh, and they are remaking these mowers in electrical form and i have seen a few hondas put on. they have a very interesting drive setup.

http://s742.photobucket.com/albums/xx61/kieranm09/?action=view&current=PICT0160.jpg&newest=1

 

[DestructionDan]

I would change that front end for a mountain bike with some kind of shocks.
Local trash dumps scrap yards and road side trash are good places.
looks good.

 

[tykenfitz]

wow, that drive systems looks straight out of a sci-fi lol

 

[sideways]

A friend of mine said he had kart with one of those engines, he said it was the slowest thing in the world, their about 75cc aren't they? Another friend of mine has one as a mower, it goes great, never boggs out or anything . My local school has a few of them sitting around too. It should go well on a trike.

Thanks

Hayden

 

[Carlman]

Good luck with tamac steering but other than that, looks fun!

 

[Cotmullion]

Added some gussets/triangulations to the back today and mounted the engine.

 

[KieranM]

, their about 75cc aren't they?
Hayden

Yea they are in the 75cc range, there small but very heavy.

 

[Cotmullion]

Footpegs added:

 

[solomon]

the PTO on that motor is very stubby, i don't think it will work with a clutch

 

[sideways]

the PTO on that motor is very stubby, i don't think it will work with a clutch

Those engines had their own clutch, don't know how it would go pulling a kart though, they were quite small. Should be okay I think.

Hayden

 

[solomon]

You always want the pto to be 2.5" long r more, than looks like maybe 1.75" at most

 

[Cotmullion]

Same length shaft on my minibike and that works fine with a clutch. More pictures:

 

[otaybay]

nice job.

 

[Blazkowiez]

You always want the pto to be 2.5" long r more, than looks like maybe 1.75" at most

I guess i'm going to live with you calling it a PTO shaft but unless he plans to mount a clutch this will not be a problem, if he plans to treat the internal clutch as a gear reduction and simply add a sprocket them he will be fine.

Cotm- That shaft does not work just fine with a clutch. Understand that standard centrifugal clutches are pressed together, when you put force on the outer half of the clutch it will snap the clutch in half and send pieces flying. It will not last very long at all if you mean to place a standard clutch on there. Alternatively I need to point out that in order for a standard centrifugal clutch to engage typically you need to reach an excess of 2200 rpm, if you have a clutch in the engine or a gear reduction then this may not even be possible.

 

[Cotmullion]

I guess i'm going to live with you calling it a PTO shaft but unless he plans to mount a clutch this will not be a problem, if he plans to treat the internal clutch as a gear reduction and simply add a sprocket them he will be fine.

Cotm- That shaft does not work just fine with a clutch. Understand that standard centrifugal clutches are pressed together, when you put force on the outer half of the clutch it will snap the clutch in half and send pieces flying. It will not last very long at all if you mean to place a standard clutch on there. Alternatively I need to point out that in order for a standard centrifugal clutch to engage typically you need to reach an excess of 2200 rpm, if you have a clutch in the engine or a gear reduction then this may not even be possible.

As I say, for my minibike build I used a clutch on the same length engine shaft, but I drilled and tapped a hole on the end for a bolt to hold the clutch on, otherwise it would break up as you say. I initially didn't have a bolt, and simply relied on the grub screws to hold it on, but this is not a good idea, as the clutch broke to peices when on WOT. Not fun at all! As far as clutch engagement goes, these engines are perfectly capable of reaching the engagement RPM.

 

[solomon]

It would be much smarter to run a sprocket to a jack shaft with the clutch on the jack shaft