Hey folks, great you're watching again!
How do you like my excellent bargain!
a go-cart.. but..
It doesn't has cranks
that doesn't drive well
but we might have an engine which might fit
a lot of you asked me
Show us how to motorize a go-cart
This has an engine
Good! And we don't need to mow the lawn for a while
Soo.. that disassembles quick
This is an ideal engine to put on a go-cart
an advantage of this engine is that it has a horizontal crankshaft
it's like this
many lawnmower have a vertical crankshaft
it goes down, directly to the blade
those are not that suitable to build on a go-cart
you need a perpendicular transmission then
that's not good
an other advantage of this engine
it has a centrifugal clutch
that means that this part
doesn't turn when the engine idles
it starts turning when you accelerate
so we don't need to build an extra clutch
so you just push the pedal and off you go
and do you know what's the best part of this engine?
let's see where to put it
it's good like this
this is nice
it turns that way
so the rotational direction is good
it should go forward
we know where to put the engine
we can't attach that to those wheels directly
the engine doesn't have enough torque
therefore we need a transmission
let's calculate that
I will measure the wheel diameter first
let me see
here's the engine
It's a Honda GX160
let's calculate that and order some parts
Before we start calculating I search for engine specs
I have them here
It does 3600rpm
we take that for the calculation
I've finished the calculation
We want to know the rpm of the outgoing shaft
we want to go 30km/h
wheel diameter is 40cm
that's 0,4 meters
I want to know the circumference
0,4 x pi
circumference is 1,256 meters
if we want to calculate the rpm
we have 30km/h
is 0,5km per minute
is 500 meter per minute
If we divide that 500 by the 1,256 of the wheel
that wheel should do 398 turns per minute
to go 30km/h
The ingoing shaft makes 3600 rpm
we saw that in the specs
We can calculate the gear ratio now
with this formula
i = n1 / n2
n1 is rpm 1, that's the rpm of the engine
divide by 398
the gear ratio is 1 : 9,04
okay.. but then..
Overhere we have the entire happy oasis all together
here's the engine with exhaust with smoke coming out
here we have 3600 rpm
first chain transmission
and here's the wheel
and the wheel should do 398 rpm
the motor pinion was there already, it has 12 teeth
I thought to take a gear with 40 teeth
because I like that
the gear ratio overthere is
i = z1 / z2
that's the number of teeth
the amount of teeth of the big gearwheel is 40
divide by the teeth of the small gear, which is 12
we get a ratio of 1 : 3,33
Now we have to find out what this ratio should be
therefore we will divide 9,04 by 3,33
That makes 2,71
this gear ratio is 1 : 2,71
I want to use a gear with 14 teeth overthere
we have to calculate this gearwheel
formula is i = z1/z2
the ratio is 2,71
the big unknown is divided by 14 (not the otherway around)
we multiply that 2,71 by 14
we get 37,94
so we need a gearwheel with 37,94 teeth
but that doesn't excist..
so let's take 38 teeth
right.. enough talking
let's order parts, where shall I do that?
I think by INDI
Let me see! Drive technology
sheet metal gears
simplex, single chain
1/2" x 5/ 16"
look at that! 8 teeth!
we don't need that
14 teeth, that one
I've added some chains and bearing
order it and proceed building!
That's nice! Cutting oil for the saw
closing links for the chain
now that's an odd gearwheel
Oh no! This will never work anymore
Diesel is getting neurotic too!
Well.. let's build something else then
this one is broken
it's not that bad
we weld it back together, okay?
are you happy now?
Ideal, now we can slide the engine
because of those slotted holes we just made
that way we can tension the chain
That works! A sharp blade
that works better
Ow Dirk, what have you done?
the steering wheel is gone
how do we steer now?
Not, we're going straight only
Oh yeah, that's true
That's better then that flimsy plastic part what used to be there
I think that too
now you can hang on to it
We're looking at this for a moment..
it doesn't fit..
we have an issue.. take a seat
We don't have cranks, but we need to make pedals
and these pedals have to come where our steering mechanism is
see; this one
and this rod in particular
those are in the way for the pedals
that's not handy
I think we have to change that
we have a few options
we can cut the entire cart in half
the pedals could go there
but we don't like that
so we thought the next thing
we cut these
that as well
we can move the complete mechanism below the frame
and then we have enough space for the pedals
excellent I guess
I think so too
hatseflats, let's make it
it's a shame, it worked so nice
hey, it works
ideal.. and look;
room for the pedals
steering rods mounted below
Let's make a kill switch
that's for pussy's
he wants to go for a ride
I think it's a good thing you think about safety
there comes the kill switch
can't miss it
we took a small, not too obvious button..
a surface-mounted light switch
that the ignition breaker wire
if you connect it with ground it will stall the engine
we'll attach it to that switch
wire to ground
if you activate the switch, it will stall
we have a on off swich overhere as well
it's hard to reach
we wanted to have one close to the steering wheel
what a luxury
is it finished!
let's test it!
nice! I wanted to have go-cart like this when I was a kid
it's ready for testing!
Let's see how fast it goes
Not very comfortable
I can say this is a success
not very comfortable, but we didn't build it therefore
take a closer look
intermediate shaft, to the rear axle
we have a accelerator overhere
cable through a steel pipe, runs to the back
to the engine
and for braking
we've used the original brakes of the go-cart
two blocks which can be pressed agaist the tires
overhere the original handbrake
we reinstalled it
but a foot pedal is also handy
it pulls with a rod
to the lever
which is welded to the rod that rotates the blocks
very simple, but it works well
do you want to have such a go-cart?
you've seen in this video how to build it
all parts come from INDI
I would say; good luck building!
If you have an idea what I should build
so you can see how to do it
I would say; post it in the comments
and who knows; maybe next time!
Hey folks, thanks for watching!
see you next time!