Kimjon's not as cool or epic as Muncie's off-road goped Bigfoot scooter thingy

[Kimjon 752]

Here it is with the crank and piston installed.

The open style of cylinder with a removable head allows me to port time the motor. I'll stick a degree wheel on the crank, turn it over and measure the degrees at which the ports open and close. Once I have this data, I'll know where improvements can be made.

[Muncie 2,662]

I think we're going to see a goped have 3 digit top speed. Dromegedden quarterly would be great.

[Kimjon 752]

Here's a view of the piston placed exactly where it ends up at BDC. note the skirt is to long and the sides of the barrel don't match.

And here it is after matching

Now it's a matter of matching to (barrel) to the cases.

 

[Kimjon 752]

Roughing it out

Still a bit of work to do, but already a huge improvement.

When I'm happy with the "flow" it will get polished up.

The intake should be rough, the rest should be smooth

[Kimjon 752]

Cases polished

Transfer ports case matched

 

 

[Kimjon 752]

Here's a before and after photo to see the difference

And after

And hopefully that equally more flow, and will be one of many things that add up to more power.

Next up for the motor is to calculate its port areas, timing, squish band and compression...then tweak those with yet more porting.