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I really don't think there will be much of a difference in power between filling that little lip and grinding it off. I've hogged out the lowers on a few cylinders and I've come to the conclusion that taking out as little as possible to smooth them out seems to work best for me. When I do the...

I decided to take the lip off the lowers and smooth them out.

Squish is without a base gasket. I'm not sure yet what I'm going to do with the lowers, I might take some JB Weld and fill in the lip to smooth the flow or drop them down a little and smooth it out.

I cut a little more out of the squish band and finished the ports up, as soon as my seals come in I'll get it together and see how it runs.

I got the piston cut flat today, just picking away at it when I've got time. I ended up using a Meteor piston instead of the one that came with the cylinder because I felt that it was to thin on top to cut.

Looks good, this one will be getting a .325 16" bar.

Been busy this week but I did manage to cut .055 from the band of the AM cylinder tonight.

The $21 AM cylinder showed up today, the casting and ports look good, upper transfers are angled toward the intake like they should. I'll try the numbers above out on this one first.

I figured I'd start with just removing the little squish band, that should put it around 96 and see how it does.

Not sure on the timing numbers yet but probably something like EX 96 , TR 24-26 opening the EX side first and IN 78. Filter looks great, I might go with a velocity stack but if I use the mesh one I'll open it up and see what I can do about the divider.

As it stand now, I've taken it a part and cleaned everything up and vacuum tested it, bad seal killed it. I removed the scored cylinder and cleaned it up, it had a lot of transfer in it but cleaned up well enough to use. It came with a 44mm Mahle cylinder and I also have a nice 44mm Stihl...

A week or so ago I did a muffler mod for it because I was board and didn't feel like cleaning the saw up, the part I hate most. I posted this in the muffler mod thread but I'll put it here also to keep everything together.

This is my first real Stihl build, I've done a couple of Stihl clones and I thought it was time to try a real one out. I got this off ebay and I'm sure I paid to much, like is often the case when you buy your saws there. This is what I'm starting with, pics from ebay.

I ended up tuning the high just a little bit richer.

I accidently posted this in the Dyno thread so I moved it over here. 361 kit saw I've been messing with. I ported an OEM cylinder and put an OEM 390 carb on it, 14,950 WOT in the video but I still need to work on the tune.

I meant to post that in the ported saw section.

Moved to the Ported thread.

An older 550 I did in July, It's not the fastest 50cc I've got but it's my favorite. Base cut and a pop up made, exhaust widened, timing advanced, lowers smoothed out and a muffler mod.

026 muffler I just finished doing.

Nice looking saw.