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Another thought In the case of weather to enlarge intake ports or by how much if inceased hinges on several factors . One I will address is that a wide or perhaps higher port will evacuate the exhaust gasses faster .This in turn should cause a greater pressure differential accross the exhaust...

I did widden the intake on the 038 Mag a tad bit ,not much .The Av was just buffed a bit ,most likely only enlarged less than 5 thou . I only took the exhaust on the AV out about 20 thou on each side,the Mag was about 40 each . I kind of guessed at what size extra hole to drill in the Av cover...

I have a thread together about the tools used for this stuff . I laid the saw to the oak,not too shabby,needs the carb opened up a tad but I can't find my skinny minnie screw driver.:what: It's a runner but it will never be a super star like the 038 Mag I did.This thing is 10 cc's less,stock...

Yea buddy.Took about ten pulls from a dry tank,ran good but not touched the wood yet,too dark at 8 pm .No great visions of grandure here like some at other places . I tweeked a 72 cc that will keep up with or snuff a stock 80 cc .If I can get this 61 cc to hang with a 70 I'll be tickled pink ...

The muffler Last but by no means least.You can gain more power by a little muffler work than just about any thing else . A pressure can muffler is nothing more than a pressure regulating device.They add the baffles to make it less noisey .Removing same does make it louder but not like a...

The intake The intake timing was not changed in any way but the whole thing was polished using a Cratex tool . The second picture shows slidding the cylinder back in place. Some people are under the impression you need a ring compresser for this .Not so,the cylinder has a champher and slides...

the ports Changing the actual port timing in a two cycle is about the same as using a special grind camshaft in a 4 cycle. You can for example us bigger valves in a 4 cycle to get more power without doing a thing to the camshaft .This is basically what this simple port job is . The exhaust was...

The 038 Mag I did was rather radical.To duplicate it a person would have to have access to a machine shop. This one is so simple a person with average mechanical abilitys could do it with a couple of files and a piece of sand paper . The patient is a good running 038 Stihl that needed a new...