Noob with a Manco 435B for my kiddos

[Wedmister]

I previously traded a 50cc Honda dirtbike for the above mentioned cart as my wife had her concerns with our kids riding the minibike. However I have recently started to get into this project some and I am starting to regret my trade. The po made a mess of the drive axle by grinding down the threads and welding a keyless wheel directly to it. Upon removing (after much grinding and sweating) I can't really tell exactly how this axle was originally designed to hold the wheel. It doesn't seem to have a keyway so I'm not really sure how this axle is supposed to drive the wheel. I have searched around in here a bit and found the manual and parts list and of course according to all the parts houses I looked up, the axle (manco p/n 13418) is obsolete. The axle almost looks like it was hollow as well? Does anyone have any specific experience with this axle, I was trying to put it back as close to stock as possible.

 

[OzFab]

Well, some pics of the axle may help

The OEM axle may be obsolete but, like anything, there's aftermarket parts available, all you need to know is the dimensions of the axle & you should be able to find a replacement...

Welcome to the forum

 

[Poboy kartman]

Well....originally...it was welded...(when you got it).... JK....

It. was probably keyed....

I wouldn't worry too much about original....just make it work....

Measure length and diameter....post back with that and some pics and we'll help you out.....

BTW: Welcome to the forum!

 

[itsid]

part number says it's a jackshaft, not a drive axle..
[EDIT]
(oh looking at the manual.. it's DRIVEN by a jackshaft indeed.. funny enough )

dimensions:
3/4 X 21.375 IN

can't tell how much was threaded but it had a keyway, at least a short one ..
for a 3/16 x .5" square key locking the sprocket/drum pack and another 3/16 square key (2" long) locking the wheel

Oh it had a 13.942" long spanner on the jackshaft (spacer for the bearings I believe)
Soo it's safe to assume no more than maybe 1.5 inches on each side where threaded
(likely the wheel side more than the dead nut side)

'sid

 

[KartFab]

itsud can validate this but your raw materials to make a new axle are as follows

1"X1" 11ga sq tubing (not sure the length)

Driver side bolt 5/8-11 x 6"
Passenger side bolt 5/8-11 x4"

Weld it up. Tada.

I'm on a cell phone now so I don't want to look up the manual. But I remember seeing a kart like that before from another pic. It didn't have tubing connecting the axle stubs together but was still a dead axle kart.

Click on my signature go to free go kart plans and then scroll down to axle and click on that link. It will show you how to make the axle. Also if your drive wheel is shot, you can get one from gopowersports or eBay or wherever else

4 1/2" drum, 60t sprocket w/10t clutch (or 72w12t clutch)
145/70-6 tires or 15x6-6

The drive wheel wi

 

[Wedmister]

Thanks for the insight, I would say that I will most likely go the route of getting the bearing to fit inside the existing chassis tube and set the axle through it. My main question was attaching the wheel to the axle which it seems like there should be a wheel with a keyed hub which I did not get from the po. A few more parts to buy I suppose!

 

[Wedmister]

Ok so after some further research it seems that the bearings that fit into the existing chassis should be 1 3/4" OD (which generally forces a 3/4" ID), which I can pickup almost anywhere. I intend to utilize a 3/4" diameter continuously keyed shaft which I can thread the ends to retain the wheel and sprocket. My only real dilemma I guess now is everything I look at for keyed hub wheels are for 1" shaft. Does anyone know of a source for wheels with a keyed hub for a 3/4" axle?

 

[Poboy kartman]

Ok so after some further research it seems that the bearings that fit into the existing chassis should be 1 3/4" OD (which generally forces a 3/4" ID), which I can pickup almost anywhere. I intend to utilize a 3/4" diameter continuously keyed shaft which I can thread the ends to retain the wheel and sprocket. My only real dilemma I guess now is everything I look at for keyed hub wheels are for 1" shaft. Does anyone know of a source for wheels with a keyed hub for a 3/4" axle?

Hold on a second....pretty much standard wheel bearings are 5/8"× 1 3/8"...you have a 1 3/4" OD ,which is 3/8" larger.....sooooo. ...what does 3/8"+5/8"=?

Maybe you should do a little bearing shopping first and then look for an axle and wheels in the 1" size.

Nevermind....I just did and you are correct wheels or hubs should br easy to find.