Here I hope to change a 15/17 head to a 16/19 it was not planned like this. But when discovering a broken glider I had no choice.
I have to renew the gliders and then I will use the 4,5mm valves because I have more options in those.
Lets see how far I come.
Broken valve glider.
Sadly it broke.
You can see it was longer like that.
Have to renew the gliders, now i will use the 4,5mm valves as they are easier to get hold off.
I have a new 16/19 set so will be using this.
First i need to make a Tool to enlarge the ports.
Start machining a disk with an M12 bold in it.
Weld the bold say it stays put.
Machined it flat.
Slowly start machining it to a 4,5mm
Used a center to keep it straight.
There she is 4,5mm
Red paint dot on M6 holder
Now where to drill.
Holder placed in head.
Tighten the bold.
Mounted the head.
It looks like it's perfectly centered.
You see it spinning.
Enlarge the ports.
Some more space for the 19mm valve.
Machined it with a grinder to smooth thinks out.
There she is a 16/19 setup.
The next challenge is to machine new glides
Start off making the valve guide.
Making the outside 9mm.
A nice 4,5mm hole
Made two, 0,05mm larger
Tool for hamering them in
Final 4,5mm hand reamer.
Nice and tight.
Measuring the cut out for the inlet valve
Cut it out off the cilinder
Flatten the cilinder.
Ready for mounting.
Changed the gasget to.
Looking good, just above the top piston ring