And now for something completely different!!

[Street Ryderz]

I've wanted to do a build with a pocketbike engine for a while now. I don't know if the big bore is actually a big bore I still think they're 44mm just with a 2 piece jug. Bore is 44mm and stroke is 32mm. You'd have to put it on a rear rack or weld a flat plate on the frame to mount it. Pipe is not included either so you would have to buy it separate as cloaked said you can get different gearboxes for them. You need a 415 sprocket because cags come with like a 25h sprocket.

hey there the cag engine is 44mm bore stock with 39-40mm(not very consistent) stroke which gives it it's 49cc displacement, the big bore that is, because their were many built as 43cc with the 40 mm bore 32mm stroke as mentioned, then there are the aftermarket kits witch are geared towards the big bore true 49cc versions.
Hope that helps some. imo they dont have the torque needed to turn big wheels very well and the clutch systems become a very weak point!

 

[Pezz]

Thanks all,

I will reach out to the vendor and ask for the specs.

I am aware of the clutch issues and will look at ways of minimising that potential problem.

Looking at the Chainsaw pic above mabye adapting a chainsaw clutch might be an option . . . .?

 

[cloakedvillain]

Pocket bikes are typically single speed and geared very high. 1.5-2hp geared low enough will wheelie.

 

[Pezz]

This was a fascinating watch and could work well on a shifter bike.


View: https://www.youtube.com/watch?v=HSPbr8_Mt-A

 

[Wrench]

interesting that a real deal clutch

A far as speed goes it all depends on the engine hp

 

[Pezz]

interesting that a real deal clutch

A far as speed goes it all depends on the engine hp

Agreed,

With these little motors it's all about parasitic power loss and Air resistance.

This whole engine thing is a massive rabbit hole, but finding more information is good for all of us

 

[Street Ryderz]

Pocket bikes are typically single speed and geared very high. 1.5-2hp geared low enough will wheelie.

yes and with the small wheel they are able to unload much quicker!
i have some video on the site doing just that lol, (wheelies)

 

[Street Ryderz]

https://video-yyz1-1.xx.fbcdn.net/o1/v/t2/f2/m69/AQNx0dsZbKufbW6gek3qbftkjmOzi8jUMj3vXLa2vK4VYk9kcNRMAVwI6RR7z49yKIXHHpwEomlDDWhKEQSTmEBj.mp4?strext=1&_nc_cat=105&_nc_sid=8bf8fe&_nc_ht=video-yyz1-1.xx.fbcdn.net&_nc_ohc=zZfvtTszjzsQ7kNvgHcIVyk&efg=eyJ2ZW5jb2RlX3RhZyI6Inhwdl9wcm9ncmVzc2l2ZS5GQUNFQk9PSy4uQzMuNjQwLnN2ZV9zZCIsInhwdl9hc3NldF9pZCI6NDM0MDk4MDAyOTAxMTk2LCJhc3NldF9hZ2VfZGF5cyI6Mjg3MywidXJsZ2VuX3NvdXJjZSI6Ind3dyJ9&ccb=17-1&_nc_zt=28&oh=00_AYBbPpXcxFBUDuWNWhg0evd0ay9i76LXVFwZ-1YSw1ld-A&oe=67CE8969