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Awesome thank you! Can't wait to see the difference

Hi there DRF255 just wondering did you ever do this timing advance? And was it worth it I have one ready to do depending on what you say.. ;)

I have a friend that owns a tree company in my town and they have 5x 550s and they happen to be there most used saws, I service all there saws for them and they really have been faultless little saws we have found the two 261s that they had were also good but they had weak clutch bearings in...

http://www.arboristsite.com/community/threads/dads-nice-365-special.302912/ I just did up my dads 365 special Muffler mod base gasket delete and it increased power by about 10 15% is my guess So yes I would say it's worth it

Just got this 395xp for cheap It's done some work ! But I'm gonna give it some love, can anyone tell me if this is an OEM cylinder just by looking at it? There is no Mahle stamped on it that I can see so....

That little saw should serve you well with a bit of TLC

looks fine to me. I would also clean out around the bottom end area it looks to have quite a bit of debris in around that area

Where did you find these images ?

I totally agree with you Something totally does not add up

So you can potentially do this to any saw brad? Ms460??

So I emailed STIHL Australia about the release date of the 462 and I got this (A little longer than I would of hoped)

Yeah I remember reading somewhere that closed port was generally a better design In stock form I felt this saw was a bit underpowered. But there nice to use that's for sure

Interesting that the cylinders could have a different transfer design in the same year... would the be any difference in the way that open ports run to the closed ?

Dads birthday is just around the corner and I thought I would give his favourite saw a freshen up its a real nice 2000 model 365 special I gave it a new OEM ring, new decomp valve, decaroned the cylinder, cleaned up and deburred the ports, deleted base gasket, muffler modded and tried my own...

371 is possibly the nicest looking saw out there I think Awesome work brad you never dissapoint on your builds

Be also very careful not to loose the little orings that go in between the plastic air filter mount and the carb They can drop out or be easily blown out with compressed air if not carefull

Especially if your already pulling the cylinder Yes sorry i see your point, the carb is actually quite easy to remove mostly but I once tried to remove the intake on one without removing the cylinder and they are extremely difficult

No you don't but it makes it easier, especially if your already pulling the cylinder

One of the biggest performance upgrades to do on your little 550 is a simple muffler mod, look up a good thread on this site and follow that, It's good for at least 10-15% power increase and better throttle response

Then on reinstalation it's the same deal Fit the intake and carb to the jug and reinstall, there is also a lot less chance of folding over the rubber intake boot and creating a air leak