Modding The MS261

[Mastermind]

I just wondered what you guys think about this concept?

I've got a brand spanking new one on my bench and I've studied this saw extensively over the last few days. It has some serious restrictions IMHO......some things about it's design that make serious woods port gains hard to achieve.

I just would like to get some input from my peers........

 

[TK]

I just wondered what you guys think about this concept?

I've got a brand spanking new one on my bench and I've studied this saw extensively over the last few days. It has some serious restrictions IMHO......some things about it's design that make serious woods port gains hard to achieve.

I just would like to get some input from my peers........

I think you should make a cutaway model of it and show us what you mean.

 

[Mastermind]

I think you should make a cutaway model of it and show us what you mean.

If I could get some funding from the viewers I'd be all over that.

 

[deye223]

I think you should make a cutaway model of it and show us what you mean.

hahaha yep you funny:haha:

don't forget the red yellow and blue paint for relevant cuts

 

[TK]

If I could get some funding from the viewers I'd be all over that.

Don't be shy now, we know you can do it. 261's are a dime a dozen anyway

 

[deye223]

I just would like to get some input from my peers........

well ya got some input but peers !!!!!!!!!!

 

[Stumpys Customs]

Are they the same port design as the 362??

 

[blsnelling]

Did you see the thread where I modded mine? That 261 can be made to run like a 70cc saw. It does require more work than any other saw I port. I did mine progressively, so you can see what it really took to get the most out of it. Everyone that ran it was amazed that a saw that small could make that kind of power.

[video=youtube_share;HxMPgN_2Mvs]http://youtu.be/HxMPgN_2Mvs[/video]

 

[Bowtie]

I just wondered what you guys think about this concept?

I've got a brand spanking new one on my bench and I've studied this saw extensively over the last few days. It has some serious restrictions IMHO......some things about it's design that make serious woods port gains hard to achieve.

I just would like to get some input from my peers........

i dont have any input, but I have a 261 almost new I can send you when my MS460 is done!

 

[blsnelling]

Here's the thread, LINK. Basically, it requires gutting all the dividers in the intake tract that make it a strato. Anything less will not get you the most gains. It was still 100% a work saw after these mods, and is still running great today. Timing advance is a critical piece as well.

 

[chopperfreak2k1]

i have been waitin on this for a month! turn on some ac/dc and do what you do brother!

 

[Jwalker1911]

those mods would work nicely on my 026

 

[sgrizz]

I just got one last week and used a half a tank of gas so far . I am excited that you are thinking of maybe putting one under the knife . When brad did his i was saying to myself what do i need my ms362 for? So i say go for it mastermind.

 

[komatsuvarna]

Did you see the thread where I modded mine? That 261 can be made to run like a 70cc saw. It does require more work than any other saw I port. I did mine progressively, so you can see what it really took to get the most out of it. Everyone that ran it was amazed that a saw that small could make that kind of power.

Thats pretty impressive for a 50cc saw......:msp_thumbsup:

 

[Jwalker1911]

Did you see the thread where I modded mine? That 261 can be made to run like a 70cc saw. It does require more work than any other saw I port. I did mine progressively, so you can see what it really took to get the most out of it. Everyone that ran it was amazed that a saw that small could make that kind of power.

[video=youtube_share;HxMPgN_2Mvs]http://youtu.be/HxMPgN_2Mvs[/video]

that is pretty impressive

 

[sunfish]

Thats pretty impressive for a 50cc saw......:msp_thumbsup:

When ya fill the strato system with fuel mix, it's a game changer.

 

[blsnelling]

I tried to avoid gutting the strato dividers, but I just couldn't get the gains I wanted. It definately made it come alive.

The divider has to come out of the carb, which requires partial disassembly of the carb. There's also one inside the carb, between the butterflies that has to come out.

The divider has to be cut and ground out of the rubber intake.

Then, a LOT of material has to come out of the intake on the cylinder.
It starts like this.

And ends up like this.

There's plenty of room to widen the intake. Just watch the one ring end.

Plenty of room to widen the exhaust.

 

[blsnelling]

I widen both the transfers and the strato intake duct.

There's no need for a popup.

I also take some of the dividers out of the filter adapter, but have no pictures of that.

 

[Mastermind]

I hate to cut up a saw that badly Brad.


I tried to read your thread on that saw but it is so filled with bull#### that I gave up.


So......no way could you make it really run without killing the strato function?

 

[blsnelling]

I hate to cut up a saw that badly Brad.


I tried to read your thread on that saw but it is so filled with bull#### that I gave up.


So......no way could you make it really run without killing the strato function?

That's why I summed it up here for you. Sure, it'll make gains with the strato left intact, but not like it can have. I started out with it left intact and wasn't happy with it. You can certainly give it a try, and can always go back in for more. That's what I did.