Ms660 popup

[species8472]

https://www.facebook.com/video.php?v=158096194960962

Any info on these?

 

[Wonkydonkey]

Is this the BB piston, my std hyway BB HAD .96 stamped on it.

 

[species8472]

Just said it was released on Dec 16 2017

Is this the BB piston, my std hyway BB HAD .96 stamped on it.

 

[Moparmyway]

Is this the BB piston, my std hyway BB HAD .96 stamped on it.

Pictures ?

 

[mdavlee]

Pictures ?

.

 

[cobey]

Did they just cut a regular piston
Or what? a normal pop up
Lowers the compression unless you cut the base or delete the gasket , what happens when hillbilly Fred
Puts it together with a gasket?

 

[Dub11]

http://opeforum.com/threads/i-seens-this-today.9892/

 

[Wonkydonkey]

Umm I just read bru's reply that they only doin the 54mm atm,
So what's the .96 mean on the top

 

[cobey]

View attachment 102494 View attachment 102496 View attachment 102497 Umm I just read bru's reply that they only doin the 54mm atm,
So what's the .96 mean on the top

Hight of the dome??

 

[Chainsaw Jim]

Hight of the dome??

You can see in the pop up pic that the top ring land is equal to the lower one, so it doesn't appear that it was machined from the existing crown.

 

[Cut4fun]

saved stuff here https://chainsawrepair.createaforum.com/stihl/hyway-660-066-pop-up-piston-domed/

The hyway guys are talking to us in the cr group but think they have some of their info etc messed up. https://www.facebook.com/groups/415662708518445/

They offered to send me one for testing and comparing.

 

[Gunn]

They’re trying to give them away through Facebook. They DM’d me after I suggested they’re putting the cart before the horse asking for me to test them out.

 

[blsnelling]

It wouldn't make any sense for them to market a popup piston if only modifying a stock one. That would require the end user to have their cylinder machined.

 

[Cut4fun]

In hand. Looks nice. Now to see if it is a drop in made right. Time will tell.

 

[TreeLife]

Interested in the results

 

[Lightning Performance]

Did Bruce get them yet?

 

[czar800]

 

[jacob j.]

Umm I just read bru's reply that they only doin the 54mm atm,
So what's the .96 mean on the top

That's how much brake horsepower it adds *but only if you're running E-85...

 

[Gentleman]

Did Bruce get them yet?

We should have some within 2 weeks.

 

[Gentleman]

View attachment 102494 View attachment 102496 View attachment 102497 Umm I just read bru's reply that they only doin the 54mm atm,
So what's the .96 mean on the top

The .96 is the skirt width 53.96