Rookie's Foray into 2 Stroke Tuning

[Rookie]

So the Misses has a YB100, and while it can do 100 with her on it I demanded more.

 

So I decided to make a spanny for it, I found some plans for a YB100 that the specs seemed to fit the bill so for $20 of materials I thought I would give it a go.

 

Because I am such a good employee I used work's resources to make the templates

 

I then marked them all out on a bit of 1mm sheet.

 

Cut them out with the angle grinder

 

Used my mates folder

 

and my angle finder

 

To bend the cones

 

Which ended up like this

 

Which I then glued together

 

 

And then chopped up to make fit on the bike

 

Which was noisy as hell, so I made a muffler and painted it

 

It worked spectacularly well, it pick up a heap of bottom and mid range, just like it was supposed to!

I then got cocky and decided that 2 stroke tuning was easy, so I decided to machine a squish band into the head, this didn't go so well hahaha

 

I used the 4 jaw and spun it up on the lathe

 

 

This was the end product

 

Compared to stock

 

I ballsed up the calcs and got half the angle I needed, so after a quick bit of work with the die grinder I chucked it on and the bike ran! So I took it for a ride, it was det central so I quickly took it home before I melted the piston.

 

The next plan is to cc the heads, machine the correct squish band, and open the machined head up to drop the CR.

[HighLUX]

That bike looks familiar

[Rookie]

The engine in it is the one I bought off you, but the bike is another one we got from Auckland that had been crashed, I made one out of the two.

[KIRK]

good jerb. I've never seen a pipe folded like that