Ring gap

[heyhi]

Would you take a pic of the bottom of your motomatic cylinder kit. I want to see how far the cylinder sticks down on the bottom of it. I'm wondering if he didnt bore case deep enough, & the cylinder lip is bottoming out on that step in your case on each side of the crankshaft.

 

[heyhi]

Is a 3 mm solder good to get the squish when I was turning the shaft It got pretty tight

 

[DieselTech]

Is a 3 mm solder good to get the squish when I was turning the shaft It got pretty tight

1mm solder would be better, anyhow that's what I use. Compressing 3mm of solder is going to be hard. When I set my squish gap at .75mm & using 1mm solder it takes quite a bit a force to overcome the solder & crush.

 

[heyhi]

Yeah it does take some force. I took a measurement with only the very bottom gasket between the spacer and the case. And no gasket between the spacer and the cylinder.
Took another measurement with no gasket at all

 

[heyhi]

These readings don't add up I think I'm going to use the 1 mm if I can find some

 

[DieselTech]

These readings don't add up I think I'm going to use the 1 mm if I can find some

Did you get .94mm with no gaskets, if so your best bet would be to mill down your base plate adapter I think. Like @ StreetRyderz said you got more options to tune the cylinder that way if you mill the base plate adapter.

 

[heyhi]

0.94 was no gaskets but it doesn't make sense. With one gasket was 1.13. 1/32 of a gasket =.794. I'm doing something wrong1.13- 0.794=0.336
1.78 -0.794=0.986. My original reading was 1.78 with both gaskets.so if I took off one gasket should have been in spec. At 0.986

 

[DieselTech]

0.94 was no gaskets but it doesn't make sense. With one gasket was 1.13. 1/32 of a gasket =.794. I'm doing something wrong1.13- 0.794=0.336
1.78 -0.794=0.986. My original reading was 1.78 with both gaskets.so if I took off one gasket should have been in spec. At 0.986

That's why I myself was curious if the cylinder bore lip on your cylinder kit was hitting down inside the case, not letting the cylinder seat all the way down.

 

[heyhi]

I should have bought everything here to work. I'll take some measurements and get back to you on that and take pictures.

 

[DieselTech]

I should have bought everything here to work. I'll take some measurements and get back to you on that and take pictures.

Yeah I'm trying to help out, I've followed a couple guys on moped army about this particular kit that you got. I thought it was supposed to be a straight forward install, but apparently not.