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It would depend on the saw .For instance a stock 038 mag has about 100-102 degree opening stock on the exhaust .It also has around 46 thou free space above the piston of which is easy enough to cut a lot off it ,still run a gasket (20 thou ) and still raise up the ex to say 96 .Gain some R's...

That piston work it seems there are two trains of thought on that which nobody can agree on .I've seen them done both with modified pistons and basically stock and they both do good . Funny though on another site I'm no longer welcome on some of the gurus will expound on not to dome the pistons...

I think what gets confusing is those RPM's are given with what Stihl had determined a safe speed with stock porting would be safe to run without leaning out the saw .Once the porting scheme has been altered they really don't apply .Fact I have several that will "4 stroke" at several thousand...

Guys like me will not even be subjected to those things until they are considered old. Early last spring Tom thought he blew a piston on one of his 441's so he bought a new one and dropped me off the old one .All it was was it blew the sparkplug out for some reason . So there went my chances to...

As far as old I might be of some help but this newer stuff quite honestly I'm out of the loop .

The two that Tom has he likes and prefers them to the 044 and 440 they replaced .Of his saws I prefer the 460 obviously but I don't use the things to make a living with .I've found for what ever reason the damned 441's can get to be a pain in the buttocks to get started or I don't know the...

I don't really know if they have been totally successfull in enhancing the 441 and 201 the way a normal saw would respond .As I understand it the 461 uses a slightly different method of design than the previously mentioned models so maybe therein lies the difference . Now Bradley David S has a...

Oh yeah the pepped up 461 has got some soup now .:thumbup: Now I'm not certain but the last I heard the 440's were only being sold on the left coast .