McCulloch Super Pro 125c build thread

[Al Smith]

There is something therapeutic regarding a high displacement saw in a big log just about like a roundy round on a Harley at about 4500 rpm's just a gettin it .I've got 5 saws over 100 cc ,three at 99 cc's and heaven only knows how many at 80 and 70 ish .More than I can keep exercised .Because of the timber size in these parts it's hard to justify breaking out a big gun just to make a few cuts .Odds are if and when I do more than likely I'll have to rebuild the carbs first .

 

[jacob j.]

This is interesting:

https://www.ebay.com/itm/MCCULLOCH-...2-276-57-82MM-NEW-SHIPS-FROM-USA/383893225511

Note: This piston is not made in Taiwan or China.

I wonder where they're getting this one from?

 

[Czed]

This is interesting:

https://www.ebay.com/itm/MCCULLOCH-...2-276-57-82MM-NEW-SHIPS-FROM-USA/383893225511

Note: This piston is not made in Taiwan or China.

I wonder where they're getting this one from?

I asked

 

[Steve]

This is interesting:

https://www.ebay.com/itm/MCCULLOCH-...2-276-57-82MM-NEW-SHIPS-FROM-USA/383893225511

Note: This piston is not made in Taiwan or China.

I wonder where they're getting this one from?

I bought a piston from them. It is most likely made in north korea...

 

[Stump Shot]

This is interesting:

https://www.ebay.com/itm/MCCULLOCH-...2-276-57-82MM-NEW-SHIPS-FROM-USA/383893225511

Note: This piston is not made in Taiwan or China.

I wonder where they're getting this one from?

If like the rest, India.

 

[Bigmac]

This is interesting:

https://www.ebay.com/itm/MCCULLOCH-...2-276-57-82MM-NEW-SHIPS-FROM-USA/383893225511

Note: This piston is not made in Taiwan or China.

I wonder where they're getting this one from?

Ya and it won’t run! Lol the transfer flow will go out the exhaust port! Lol the oem piston has that blocked off!

 

[Al Smith]

I don't know about all that ,it's a semi slider similar to the original .

 

[Bigmac]

I don't know about all that ,it's a semi slider similar to the original .

Al it won’t run well, it may run, but it will be a dog!!

 

[Stump Shot]

Well, all I can say is if any of y'all decide to try one, regardless of performance, check the wrist pin carefully before using it. They are notorious for being undersized.

 

[p61 western]

This thing still on?

 

[Bigmac]

I have delt with this in more modern 2t’s, and the side cut out’s short circuit out the exhaust on the sub exhaust, or triple ports. They run but are way down on power.

 

[Bigmac]

This thing still on?

Well until you call Terry...

I have 4 cylinders down there and I have called either

 

[jacob j.]

View attachment 281685
Al it won’t run well, it may run, but it will be a dog!!

I agree - the shape of the LRB piston is almost identical to the first run of 101A pistons, which were used in some industrial applications.

How they ended up with that cut-out on the exhaust side is beyond me. I doubt it would help scavenging. Of course you can't install it the
other way because there'll be a huge free-porting issue.

 

[Bigmac]

If they just didn’t drill it all the way through it would be ok. Or if they cast in the boss in like the oem sp125 piston. And it look like it’s for a press pin, kart style, so it won’t work with the sp rod! Or else the pin would not be retained, no keepers, so it could slid out.

 

[p61 western]

Well until you call Terry...

I have 4 cylinders down there and I have called either

Lol I need to, I just got so much other stuff on the go right now. It's crazy times having two teenage boys lol.

 

[jacob j.]

Lol I need to, I just got so much other stuff on the go right now. It's crazy times having two teenage boys lol.

If you'd quit buying trucks, yannow...

 

[p61 western]

If you'd quit buying trucks, yannow...

Lol I still only have one, but the kids yes that's another story.

 

[Bigmac]

Lol I need to, I just got so much other stuff on the go right now. It's crazy times having two teenage boys lol.

Just have to fling! Lol I see what you have been doing! And totally respect what your doing!

I need to call Terry, it’s been a while! Been busy with bike stuff

 

[Czed]

I asked
View attachment 281682

 

[Stump Shot]

View attachment 282190