660 non sense.

[Stump Shot]

I usually take .060 out of the squish on a 660. But unless the intake is over 85, it won't hurt anything. I used epoxy in one to try 80.....and it was slower.

They can get fuelly with a tad much intake.
No doubt everyone's "number" will different slightly from each perceive.

 

[Stump Shot]

That is a whole lot more saw!

 

[Stump Shot]

I'd rather use an axe.

At least you will still have a working axe at the end of the day.
Operator on the other hand might be in need of a part or two. Lol

 

[00wyk]

That is a whole lot more saw!

It's all perspective, really. To me, it seems like a bit more saw than a 660.

I won't be using it for falling except very rarely, and it will usually be tractored to where it's needed. So the weight and size are no matter.
I just ported a 394xp for a customer, and thought it would suit our needs well.
We have a few large oaks down on the property similar to the image below, and the more power the better.

I was looking at 390's, but having used one extensively in Oregon and Washington, I don't think it would be up to the tasks, especially for long cuts in oak.

 

[Jason628]

Cross cylinder is on.

 

[srcarr52]

So we need a big saw to send into the grinder here on the estate. Should I bother with the 98cc Neotec 660 clone? Or would it be better to go standard 92cc Neotec and port it and swap out the rings?

To answer you original question, I've found the regular bore clone cylinders coming on the clone saws to be better timed than the BB versions I've seen in the past. Most had problems with free porting and long intake duration.

 

[Maintenance Chief]

Do your research , if you think that the clone saws are on par with oem you'll be disappointed.
Can you get them to cut firewood reliably ?, I have and I don't have much trouble with the ones I've got. That being said I like my old saws for most fire wood duty. I think the prebuilt saws are put together with better parts .

 

[00wyk]

Odd... I thought I was doing research...

 

[Maintenance Chief]

Odd... I thought I was doing research...

I suppose your right!
A friend of mine has the blue 660 to mill with,I went through it when he got it.
I put an oem decomp in it and the coil went bad after 2 years. Other than those 2 things he's had no trouble with it.

 

[Jason628]

I suppose your right!
A friend of mine has the blue 660 to mill with,I went through it when he got it.
I put an oem decomp in it and the coil went bad after 2 years. Other than those 2 things he's had no trouble with it.

A few random problems with the clones I can deal with. I haven't had any catastrophic failures as of yet. The new neotec saw seems to be of better quality than the kit saws. Looking through the spark plug hole and the exhaust, the ports look more symmetrical and edges are beveled nicely on the ports I can see without pulling the cylinder. Have yet to check timing or squish on the kit saw with the cross jug and my new neotec clone. Been busy with other projects.... Trying to scab together a Meyer E47 pump/lift cylinder that the base is cracked on and get it working without leaking all over the place until I can get parts to fix it correctly. Currently in another winter weather advisory for more snow.

 

[Paul Fithian]

96 121 82 were the numbers I recorded

I measured 95/117/82 on a stock assembled G660 built 11/2022.

Installing Cross cylinder in a few days, see https://opeforum.com/threads/holzfforma-g660-cross-cylinder-upgrade.28246/

 

[Funky sawman]

The cross cylinder I put on my new old stock oem 660 is phenomenal. All I did was chamfer the ports a little and square up the squish band by hand with a 53.80mm wooden dowel with sandpaper glued on the end of it. Well over a hundred gallons through that saw in a year now, still runs like new and the plating is still perfecto

 

[Moparmyway]

The clone saws that I’ve seen be reliable have OEM:
Cylinder
Chain adjuster
Intake boot
Fuel & impulse hoses
Oiler & gear with the arm
Seals
Carb
Coil

Now it’s decently reliable, so why bother with it at all when you can get a good used 066/660 for less $$ ???

 

[Maintenance Chief]

The clone saws that I’ve seen be reliable have OEM:
Cylinder
Chain adjuster
Intake boot
Fuel & impulse hoses
Oiler & gear with the arm
Seals
Carb
Coil

Now it’s decently reliable, so why bother with it at all when you can get a good used 066/660 for less $$ ???

I might have agreed with you on most of that list except for the new 592s and 585s coming from the factory with a kinked fuel line. That really blew my mind!

 

[Moparmyway]

I might have agreed with you on most of that list except for the new 592s and 585s coming from the factory with a kinked fuel line. That really blew my mind!

Except QC across all platforms is sagging.

Truthfully, kinked fuel lines has nothing to do with having a reliable clone, however it does leave a significant and lasting impression.

I just ported a NIB 500i that had not been fueled which had a few score lines in the plating. One of them on the intake side, below the intake port was deep enough that it looked like it was an actual crack. No score lines on the piston or rings, just the brand new cylinder. I’ve also found metal shavings in the crankcases of 462’s, 3120’s, 661’s …… all NIB, never fueled saws.