Saw builds

[jmssaws]

Something doesn't sound right there!

I thought a saw was supposed to 4 stroke when you lift?
What can I do to make them stop?

 

[Brewz]

FFS
I give up!

Bloke gives me his 064 to port but he wants to keep the OEM cylinder original...... Don't ask

We decided to keep it as an 85cc 064 so I ordered one of the Lil red barn P&C kits.
Checked timing first:

OEM: 101/122/73
LRB: 96/122/82 and only .050 to freeport

Then I found this.

OEM spark plug hole has 7 threads
LRB spark plug hole has 11 to 12 threads

OEM:





LRB:





I have requested a refund.

 

[Deets066]

FFS
I give up!

Bloke gives me his 064 to port but he wants to keep the OEM cylinder original...... Don't ask

We decided to keep it as an 85cc 064 so I ordered one of the Lil red barn P&C kits.
Checked timing first:

OEM: 101/122/73
LRB: 96/122/82 and only .050 to freeport

Then I found this.

OEM spark plug hole has 7 threads
LRB spark plug hole has 11 to 12 threads

OEM:

View attachment 64362

View attachment 64364

LRB:

View attachment 64361

View attachment 64363

I have requested a refund.

Plug sure is in there a ways

 

[jmssaws]

I ported one of these 064 cylinders for Jack that was a excellent cylinder.
He couldn't start it so I ported the am cylinder with a decomp.
150lb and ran well.
Matter of fact I tested 5 or 6 different ks and mahle 064 cylinders and the am one ran the best stock.
Shame there's no consistency.

 

[Brewz]

Hmmmmm
I wonder if the excess metal is in the chamber?
The plug sits short too.

Hmmmmmm

 

[jmssaws]

Looks like a helicoil or something like it.
I never noticed one like it.

 

[jmssaws]

Looks like a helicoil or something like it.
I never noticed one like it.

 

[Brewz]

I ported one of these 064 cylinders for Jack that was a excellent cylinder.
He couldn't start it so I ported the am cylinder with a decomp.
150lb and ran well.
Matter of fact I tested 5 or 6 different ks and mahle 064 cylinders and the am one ran the best stock.
Shame there's no consistency.

I remember the thread, and its why I got one.

I am going to talk the saw owner into porting the OEM cylinder and may have a crack at grinding this AM POS out to some speed saw numbers.

Maybe 97/117/80 with a bit of fill in the intake?

 

[Brewz]

Looks like a helicoil or something like it.
I never noticed one like it.

Its got that shinny/matte look after I screwed the spark plug in.
Its just solid metal almost twice as thick as normal

 

[jmssaws]

I remember the thread, and its why I got one.

I am going to talk the saw owner into porting the OEM cylinder and may have a crack at grinding this AM POS out to some speed saw numbers.

Maybe 97/117/80 with a bit of fill in the intake?

See what kind of compression it has stock,you may not need to lower it and 82 ain't gonna hurt it to bad.
I'd have to look but I think Jack's is 98 82+

 

[mdavlee]

I quit filling the intake for anything less than 85.

 

[jmssaws]

Seems like every saw I do lately the intake ends up at 82. Excluding a 661

 

[Brewz]

The hole has not been recessed enough from the outside

It gets better..... check the uppers.





This cylinder is not getting used on customer saw.
Open to ideas on what to do with it.
I was wrong on the freeport, its got more like .080

I am thinking 281 piston?

 

[Brewz]

See what kind of compression it has stock,you may not need to lower it and 82 ain't gonna hurt it to bad.
I'd have to look but I think Jack's is 98 82+

about 20* blowdown on that?

 

[Chainsaw Jim]

Brewz, just raise the transfers about 5 degrees and use a longer plug. You may be quite surprised how it runs.
20° BD don't sound bad at all.

 

[jmssaws]

about 20* blowdown on that?

Sounds good.

 

[Chainsaw Jim]

Don't laugh at the fuel line. Lol

 

[Brewz]

CJ, I wish you ran you saws in Aussie ironbark with a long bar and could tell me how those numbers handle it.

I guess the only way I am going to find out if to do it.

 

[Brewz]

View attachment 64372
Don't laugh at the fuel line. Lol

Laugh.... thats a great solution.
What sort of advance did you find worked on the 024.
Mine is sluggish off the mark

 

[jmssaws]

Hardwood or soft a strong saw is a strong saw none the less.
I find softer wood loads a saw better because it's actually cutting it.