Here's some things that have been going on in the workshop the last couple of weeks/months.
I've done a bit of cleaning in the workshop.
I had these parts ordered and already at home, and I was curious if there would be any interest in them over here in Netherlands. So I put them for sale at a large Dutch website where people can trade stuff.
It is sold with profit and I already ordered new rods and this time I ordered 2 aluminium GXV 160 flywheels (double the fun for the price of 1 billet flywheel). When they have arrived I will see if I can make an adjustable steel hub in them with the use of the stock recoil starter. That would make it easier to adjust the ignition timing.
This is 1 of the first 3 GX160 engines I bought.
From the other side. Ready for disassembly.
Stripping down the engine. It's engine code is QMD6, meaning it has lighting coils and an oil alert. Both will be removed.
When I took the cylinderhead off, I noticed it's chamber looked different as to the other engine I first disassembled. Also the piston is different; it is dished, while the other was flat. The first engine I disassembled had an 18CC cylinderhead, so would this be a 14CC cylinderhead?...
...Yes. 14 grams of water filled the chamber.
Not sure what to do with this head, yet. I don't like the narrow space between the opened valve and the cylinderhead sides. There's almost no room for proper flow. I think there's room for improvement, but first I will see how it performs stock.
I ran into a great deal some time ago. Someone had an used GX160 engine for sale and mentioned he had more of them, so I offered him money for all 3 engines. They've been used in go karts and 2 of them had the clutches still on. It were 20T #219 chain clutches, so I couldn't use them and by now the clutches have been sold, which leaves just the engines. I have 7 GX160 engines by now.
Before I sold them I tried the clutches on the General Lee minibike. 20T front sprocket, 85T rear sprocket; 1:4,25 ratio. Once the clutch engaged it was fun and scary at WOT. It was fast and I had to hold on tide to the handlebars, because it felt like it wanted to wobble.
I'm not sure about the speed (no tacho- and speedometer) but with this ratio 5000 rpm's already means 50mph.
I noticed the oil fillercap leaked a bit of oil. With a torque converter installed the diameter of this oil filler cap is to big, so I used the lathe to make it smaller. This oil filler cap is ordinary M20x2,5 thread, so if I would take a stainless M20 bolt and do some modifications to it, it will fit and be a lot beefier as this plastic one.
Engine taken apart.