Porting The MS201T

[Mastermind]

This ain't the first one of these I've done......but the first one was just last week. After doing a couple, I figured I'd share some of what I've figured out about em.

First thing I found was this strangeness.



From another angle...



And the case.....





OK, so you can see that the transfer inlet sticks down into the case......that would make it tough to cut the base on this jug. The case could be milled.......but I'm not gonna try that.

I did something else instead.

 

[Mastermind]

The base gasket is .018" thick, but when removed, we only end up with .010 squish clearance.

 

[Mastermind]

So......I setup the jug in the lathe and cut .006" from the squish band, and made the clearance .016" without a base gasket. That will bump the compression about 25psi.

 

[Mastermind]

Then it got some port work......of course.

 

[Mastermind]

And a muffler mod....

 

[Mastermind]

The ignition timing got a bump too.

That is all there is too it.

Bye.

 

[pro94lt]

Nice

 

[aarolar]

I bet that tiny little cylinder is fun to work in...

 

[Bieber]

That saw ain't made for easy reassembly

 

[Mastermind]

It ain't too bad.......with the right tools. I cut the burs off I use in the RT angle....

 

[CR888]

opcorn:opcorn: Randy has a cool job making saws go fast. Do you think Still has fixed this model now with new ignition blah blah ect? Or do they suffer from the same floors? I have a rear handle 201 & was using it yesterday with some of that itsy bitsy narrow kerf oregon chain and sheez that skinny chain can run! lts just not to good when you try cutting nails with it.

 

[Duane(Pa)]

It ain't too bad.......with the right tools. I cut the burs off I use in the RT angle....

Vids or it didn't happen....

 

[Duane(Pa)]

Jest bustin' ya Randy. I know you have been playing catch up

 

[CR888]

When deleting the base gasket, do you use some sort of sealent like yamabond ect or metal on metal?

 

[Mastermind]

I use Loctite 518.

 

[AKDoug]

Was this one of the first gen 201T's or the newer one with the improvements?

 

[Mastermind]

Brandy new Doug.

 

[bryanr2]

ive been itching to see one of these actually "ported" and not just modded.

 

[AKDoug]

So, how much timing advance? The new ones were supposed to be advanced already?

 

[Mastermind]

I can't tell that the new ones are much better than the old ones Doug.

I think they may be tuned a little better from the factory now though. Proper tune makes a huge difference in this unit.