MMWS MS660

[mdavlee]

I think the most I took from one was .080" it's at 103 with around .020" left of skirt.

 

[GoBigBlue1984]

Send me a message.......I gotta get some info from you.



I wish.........but this jug would not quite get there. 98 122 83

I stalked your old arborist site post on the 660 build Randy and used those numbers. Widened, raised transfers and it is spot on. By far my favorite saw to run. I hope to bring it with me in December. I ended up at 98/122/82

 

[GoBigBlue1984]

Most likely ran out of piston skirt, this jug probly started with an exhaust of 95 or 96

Most all of mine have been 95/96 stock

 

[CR500]

What happened to the cylinders you helped design for the 660 Randy?

Would be nice to try one out with a good meteor piston.

Sent from my non internal combustion device.

 

[jmssaws]

I have a 066 cylinder that's 93 and one that's 99.5,both stock and both have a 020 squish.
If I've seen 2 alike I don't remember it.

 

[huskihl]

What happened to the cylinders you helped design for the 660 Randy?

Would be nice to try one out with a good meteor piston.

Sent from my non internal combustion device.

There were some slight miscommunications as to whether this jug was going to be set up for an 064 with smaller 5mm bolts and a narrower bolt pattern, or on an 066 with larger bolts and bolt pattern. It's my understanding that the problem is being worked out and they'll be available soon.

The kits come with a nice looking Cross Performance piston (although I haven't weighed it or compared visually to an oem version) and Caber rings

 

[smokey7]

Holy chit 93* ex. Still the same duration?/timearea? That saw had to run funny..... or maybe they did something to to some other chit to make it run.....? Hell i am so lost.

 

[Deets066]

That's good to know Deets. How much did you take from the squish?

Squish was cut three different times, I don't recall the amount. I'm pretty sure the base had .072 taken off though.

Probly around 60 out of squish, the new piston also had a short crown height

 

[Stihl working Hard]

the local ones have the new coils in them to have them running fatter.

That's correct Vince after updating my coil to the new one I was wondering what coil Stihl had put on them after they stopped selling them for a few weeks so I went down to my Stihl dealer and asked them to pull the pull start off surprisingly they did it's the same one I have put on mine and yes it's a little fat but it's safe.It runs better than it did before I just wish the Mtronic reacted a little quicker

 

[Stihl working Hard]

Me either! Not the smoothest or fastest saw but dead nuts reliable & tough. After M/M ported mine & made the oiler somthing the EPA would cringe at, its place is safe in my stable. Much better than stock. I have resisted buying a 661 until a few factory upgrades have flushed away most of its bugs. They are close, but not quite there yet.

Couldn't agree more I haven't had an issue with my 660 it's only stock bar the factory MM .In saying that the 661 is an awesome saw yes it has issues with the Mtronic hopefully they can get it right bar that I have no dramas with the saw .

 

[Moparmyway]

M-tronic 661 ??
Not me

 

[Stihl working Hard]

M-tronic 661 ??
Not meView attachment 31826

How is the saw running Mike please elaborate

 

[CR888]

There's no doubt the 661 has many good things going for it. Its no turd but just needs a lil refining.

 

[Mastermind]

What happened to the cylinders you helped design for the 660 Randy?

Would be nice to try one out with a good meteor piston.

Sent from my non internal combustion device.

They are supposed to be for sale at HL Supply in October. They will be available in both 064 base pattern, and 066.

The piston that comes with them is a very good looking piece. I think the exhaust ended up a little too square, but the two samples I saw had a very nice bevel, so that shouldn't be a problem. We left the exhaust port about stock width too, so ring wear should not be a issue.

 

[Moparmyway]

How is the saw running

@Hedgerow ran the mule last, probably best to ask him !!

 

[Mastermind]

@Hedgerow ran the mule last, probably best to ask him !!

I heard it was bad ass......just sayin.

 

[Stihl working Hard]

@Hedgerow ran the mule last, probably best to ask him !!

Apart from the carb and wiring loom are there any other mods made .Does the flywheel need replacing

 

[Hedgerow]

I heard it was bad ass......just sayin.

It runs Really nice, and has very good manners. If I was in the market for a saw that size I would have to take a hard look at that model.
Kevin did a good job on it.

 

[jmssaws]

Holy chit 93* ex. Still the same duration?/timearea? That saw had to run funny..... or maybe they did something to to some other chit to make it run.....? Hell i am so lost.

It's a ks red light cylinder, 93 117 83
I have another red light cylinder that's
98 119 77
Crazy how much they vary

 

[GoBigBlue1984]

It's a ks red light cylinder, 93 117 83
I have another red light cylinder that's
98 119 77
Crazy how much they vary

How well does the KS jug with high exhaust run?