562 base gasket delete, squish?

[Ronie]

My wife got me a 562 for my up coming birthday, ordered yesterday, and I've been looking around for info on doing a base gasket delete. I've seen all kinds of squish numbers posted after they did the delete, from 0-.019, is there that much variance in the top ends from different years? I had one this past summer and wasn't to happy with the lack of torque and I'm thinking that I'll do something with this one.

 

[huskihl]

My wife got me a 562 for my up coming birthday, ordered yesterday, and I've been looking around for info on doing a base gasket delete. I've seen all kinds of squish numbers posted after they did the delete, from 0-.019, is there that much variance in the top ends from different years? I had one this past summer and wasn't to happy with the lack of torque and I'm thinking that I'll do something with this one.

Most of the errant squish readings are probably from the cylinder not sitting down tight on some. There are about 5 spots that need clearanced after the cylinder is lowered from machine work

 

[Ronie]

Most of the errant squish readings are probably from the cylinder not sitting down tight on some. There are about 5 spots that need clearanced after the cylinder is lowered from machine work

Thanks for clearing that up, I'll make sure mine sets flat on the case.

 

[huskihl]

Thanks for clearing that up, I'll make sure mine sets flat on the case.

The left front of the case needs some and possibly the right front. But most of it is where is the divider sets down between the carb and engine

 

[Ronie]

The left front of the case needs some and possibly the right front. But most of it is where is the divider sets down between the carb and engine

Thanks, I'll pay close attention to those areas when I drop the cylinder.

 

[Ronie]

I just pulled the cylinder and thought I'd post my squish numbers in case anyone else is wondering, without the base gasket I got .010 and the base gasket is .029.

 

[drf256]

My understanding is that the squish is tightest near the chamber and looser by the cylinder edge on the 562.

You can add a step flashing .010 gasket and be done. You can’t sand the squish cause it’s plated.

PITA of a saw. They do run well (when they actually do) though.

 

[Ronie]

My understanding is that the squish is tightest near the chamber and looser by the cylinder edge on the 562.

You can add a step flashing .010 gasket and be done. You can’t sand the squish cause it’s plated.

PITA of a saw. They do run well (when they actually do) though.

I didn't realize the band was plated, glad I didn't attempt to cut it.

 

[smokey7]

I sure do love the info that comes from this place. Even when not looking for it I find it and apply it later on. Thank you guys

 

[Ronie]

My understanding is that the squish is tightest near the chamber and looser by the cylinder edge on the 562.

You can add a step flashing .010 gasket and be done. You can’t sand the squish cause it’s plated.

PITA of a saw. They do run well (when they actually do) though.

On this cylinder, the squish is tighter on the edge and increases as it gets closer to the chamber, others may be different.

 

[Ronie]

The left front of the case needs some and possibly the right front. But most of it is where is the divider sets down between the carb and engine

I think I see where you was talking about, the flywheel side screw is just touching and on the clutch side, it looks close, I'll take some off anyway, but not touching, this is with .028 off the base. I'll also take some off between the carb an cylinder. Thanks for the info.

Just want to add that I took .080 off the cylinder flange.

 

[Ronie]

Pics of where I had to take some off so the cylinder would set flat. I also had to elongate the muffler support holes.