Kimjon

On to the exhaust expansion chamber (yes that rather rusty one in the above photos).

There's an entire science dedicated to these...and I've used none of it "designing" mine.

What I have is a reasonable past history with 2-strokes, so I'm simply going by what feels right. At the end of this project I'll soon know if I did the right thing or not?

Playing around with the proportions. I want to pay homage to the original, by keeping the look it had. 

I've seen some homemade variants of these using gravity fed fuel tanks stuck on top in the past that just kinda miss the mark style wise. It's a fine line getting something proportionately correct...fingers crossed it will look the part when finished?

Welded up the engine mount:

Then fitted this to the frame

And finally popped the motor on for and overall first impression.

So far, so good. 

So onto the build:

Engine will be a pocket bike 49cc motor. I have a few of these now, parts are cheap and easy to get and they're pretty good motors for the money.

I started by cutting up the pivot mount, just visible behind the wheel.

Then I cut the engine mount out of the donor pocket bike also purchased from trademe for $30. I brought the pocket bike for the motor, but the extra bits like this also come in handy and can save a lot of work.

Anyone with a keen eye will notice a few parts are missing, but for $23.50 what do you expect? However I see this as an opportunity to improve a few things that the original design didn't quite get right.

1) The original was only 22.5cc, it still did 20mph...but there's room for improvement.

2) The original had a tension cable that moved the motor directly onto the rear wheel, where a knurled friction drive would make contact with the rear tyre to drive it. This system wears out tyres, and slips in the wet. I'm going to look at a chain drive alternative.

Those are the main improvements I'll be looking to address, other stuff is just for fun.

Fast forward about 40 years and unfortunately I still can't justify/afford to rock up to a shop and buy a brand new one, however this fabulous opportunity presented itself on trademe.

Now I know what you're thinking, but sadly I had to pay extra for the coffee cup...it wasn't included in the $23.50 I paid for it.

Hard act to follow @Muncie with a fucking V-twin on a goped!!!, but if imitation is the sincerest form of flattery...then this is my lame arse  attempt.

So, ever since I was a kid I've wanted one of these

It was called the "Bigfoot" and to a little boy growing up on a bush block with no concrete within about 5km, it appealed to me as something I could rip around the gravel driveway on.

However the excessive price tag ment it stayed a dream, as I never got one (rightfully so, these things were something like $1500 to buy in NZ during the 1980's).

^^^^That's badass!!!^^^^

Then I made the furniture for inside the office.

Filing cabinets, used to make a storage unit/seat:

Got to get some foam and material to do the upholstery for the seat.

Another random project, an office for my wife.

1 hour ago, Muncie said:

The feeble brakes and plastic front wheel aren't staying I'm just so eager to ride it and hadn't sourced something else yet. Thanks @Kimjon

Cool, its yours. Pm me for details

I put this side, but never found a use for it... if it's of use to you, you're welcome to have it?

13 minutes ago, Muncie said:

Video or it didn't happen?

https://youtu.be/EWctgcM9FbU

Goes good eh! Gotta be happy with that result.

Badass!!!

Stands for a grinder and a linisher:

Welded up out of left over bits...

And painted

Better than paying about $150 each.

Then tidy it up and paint:

And finally learn to ride it, which was way easier than expected...

Now off to save the world!!! 

The two bikes although the same brand were different sizes, so I had to remove about 15mm from the frame on all three sides:

Then tack it together to check alignment:

Yep, rough enough!

After finishing the drift trike, I needed a quick and achievable project to take on for an easy win.

Talking to an avid cyclist friend of mine, he casually asked if I'd heard of "tall bikes save the world"? "WTF are you on about", was my reply! But when home I googled it and then couldn't stop thinking about it...so:

Carburetor turned up...it's huge! Going to have to rethink this, probably have to make up a long runner/manifold to reposition it, as there's no room where the current one is.

18 hours ago, 64vauxhall said:

il start a give a little page. hows that sound? 

everyone chip in a dollar and il get one

 

Sounds like better use of donated money than buying a stupid beach near Nelson...it's not like nz doesn't have enough public access to beaches, however sachs rotary mini kombi vans - now there's a worthy cause!

Hurry up and finish it...I'm keen for a race

Okay, you've probably seen this link...but just in case:

It sat in the corner (to borrow my best friends quote) next to the electronic keyboard and the karate suit for a while. Then one morning I woke up and thought fuck it - and rode it down the road about 3km and back. Man it was fun, such a unique ride, so much fun with smiles from ear to ear and average speed of 75kph.

Since then I've ordered a much bigger Miukni carburetor off eBay, waiting on delivery, should be an improvement

Kj

Got the paint done in Henry Ford style: