Let's build me a red head 670!

[Johnmn]

So the 625/630/670 has got to be my favorite series of saws. They are simple, rugged and really keep up pretty damn good with the new stuff!
The 625 is an open port 60cc saw.
The 630 is a closed port 60cc saw that had ks and mahle cylinders. I have timed both and both have been very close.
The 670 is the big daddy closed port 67cc both of mine are mahle but I believe Gilardoni made them as well.

I currently have the saw tore down soaking in parts cleaner. This will also be real time and I'm gonna need to order some parts so it will be slow!
Here is the cylinder I'm working with

 

[Johnmn]

Still cleaning.....

 

[smokey7]

My favorite saw to build too. I have a few from 625 to 670 and blends of huskys too. If you need some stuff i may be able to share/spare s couple things. Ive gotten things payed forward to me from here and should probably do the same.

 

[Johnmn]

My favorite saw to build too. I have a few from 625 to 670 and blends of huskys too. If you need some stuff i may be able to share/spare s couple things. Ive gotten things payed forward to me from here and should probably do the same.

Thanks! I think I'm going to build this extra spicy for maybe a just for fun/GTG saw. But for now, bearings,seals, o rings, gaskets, impulse, fuel line and filter, intake boot, carb kit, meteor piston ect.
I'm also thinking about a 266 p&c in my 630 just because it's a direct swap

 

[smokey7]

I have one with a 266 topend and i cant tell the difference with it and a 670 topend. I too feel like the 266 268cp 630 and 670 all run better then the 272. Or atleast sportier and more free.

 

[Johnmn]

Got more parts cleaned up last night! Hopefully more cleaned up tonight as well!

 

[Johnmn]

I have one with a 266 topend and i cant tell the difference with it and a 670 topend. I too feel like the 266 268cp 630 and 670 all run better then the 272. Or atleast sportier and more free.

If I could post videos I'd post one on how well they run! I'm shooting to disappoint a 372 or 2! I know it can be done!

 

[Johnmn]

I have zero clue how to copy a past a video but there's one in this thread. Not mine but an example.
http://opeforum.com/threads/jonsered-670-champ.7519/

 

[5000+]

I have one with a 266 topend and i cant tell the difference with it and a 670 topend. I too feel like the 266 268cp 630 and 670 all run better then the 272. Or atleast sportier and more free.

Loaded with a 24" or longerbar burried the 272 will pull ahead.

 

[Johnmn]

Parts are in route!

 

[old guy]

If I could post videos I'd post one on how well they run! I'm shooting to disappoint a 372 or 2! I know it can be done!

Hey John, I can hear one of my 372s smirking out in the shop, I guess it's on.

 

[Johnmn]

New bearings showed up today!

I enjoy using @Mattyo tool for this!

Quick and easy

Heat up the case halfs in the toaster oven

 

[Dub11]

View attachment 147120
New bearings showed up today!
View attachment 147121
I enjoy using @Mattyo tool for this!
View attachment 147122
Quick and easy
View attachment 147123
Heat up the case halfs in the toaster oven

Do you have to space those bears or just slide them on till they stop?

 

[Johnmn]

Crank slides right into hot case

A little 518 and the gasket

Boom! Complete! I heat my cases to 325 for 10 minutes and every goes together slick as snot.

 

[Johnmn]

Do you have to space those bears or just slide them on till they stop?

On the older ones I slide them on the crank first and then they sit flush on the inside of the case. On the newer ones I install the bearing on the case first because they have a stop.

 

[Johnmn]

New o-ring on the seal retainer.

I like to put some oil on the bearings

Install seal in bearing retainer

Then install retainer

 

[Johnmn]

New bellows,kill switch and some heat tape oh and tank installed.

 

[Johnmn]

Thanks @Definitive Dave

 

[Johnmn]

This is where I need a little help timed the ports without base gasket.
Ex. 107
Trans. 123.5
Intake 71.5

Now I am thinking about leaving the transfers and taking the exhaust up to 103 and maybe intake to 78? Any thoughts appreciated!

 

[srcarr52]

This is where I need a little help timed the ports without base gasket.
Ex. 107
Trans. 123.5
Intake 71.5

Now I am thinking about leaving the transfers and taking the exhaust up to 103 and maybe intake to 78? Any thoughts appreciated!

No need to go larger duration on the intake than on the exhaust. It's only going to reduce your crankcase compression.