McCulloch Super Pro 125c build thread

[Bigmac]

Thanks you covered that better than I could have for sure. Oh and thank you for the block again.

No problem, I had saved all the pics from when we talked about it, so it was easy! Lol

No problem, it has a good home now. Can’t wait to see her in action!

 

[p61 western]

No problem, I had saved all the pics from when we talked about it, so it was easy! Lol

No problem, it has a good home now. Can’t wait to see her in action!

I think it was a good education showing all the differences. Curious to see what the timing numbers are between the Kart and CP blocks are.

 

[sawfun]

I think it was a good education showing all the differences. Curious to see what the timing numbers are between the Kart and CP blocks are.

I know a member who was taking timing numbers from the various 123cc Mac's. He found the regular 797's had several versions, and had markings if you knew how to read them, with the earliest being the most aggressive. The CP's were slightly different than the SP's (The "C" may be different yet). I have no idea where his data went. I do know that a super 797 cuts like a CP so I believe their timing must be pretty close to the same. I'm sure the 101 variety vary quite a bit in themselves. I'd guess long track vs short, torque vs rpm HP requirements.

 

[Bigmac]

I know a member who was taking timing numbers from the various 123cc Mac's. He found the regular 797's had several versions, and had markings if you knew how to read them, with the earliest being the most aggressive. The CP's were slightly different than the SP's (The "C" may be different yet). I have no idea where his data went. I do know that a super 797 cuts like a CP so I believe their timing must be pretty close to the same. I'm sure the 101 variety vary quite a bit in themselves. I'd guess long track vs short, torque vs rpm HP requirements.

Would love to see that info!

 

[Bigmac]

I just timed these with measurements and an online calculator, so it could be off, I like the wheel more!!
Stock 101aa 174/131
Stock 101b 176/130
Stock cp125 I think it is an early block 164/123
The kart exhaust port is almost 2.5mm higher

I will do and assembled numbers later

 

[Bigmac]

After seeing the kart numbers it would be interesting to try filling the transfers a little and get the duration down a bit

 

[p61 western]

I know a member who was taking timing numbers from the various 123cc Mac's. He found the regular 797's had several versions, and had markings if you knew how to read them, with the earliest being the most aggressive. The CP's were slightly different than the SP's (The "C" may be different yet). I have no idea where his data went. I do know that a super 797 cuts like a CP so I believe their timing must be pretty close to the same. I'm sure the 101 variety vary quite a bit in themselves. I'd guess long track vs short, torque vs rpm HP requirements.

Would love to find that info as well.

 

[p61 western]

Dropped off some parts at Terry Ives today so he can put together the block. We talked about carbs and Reed blocks as well. For now will be going with stock Reed cage with 2 stage reeds. It was pretty tempting to go with the set up in this picture though.

 

[Bigmac]

When is he going to finish the assembly?

 

[Bigmac]

Dropped off some parts at Terry Ives today so he can put together the block. We talked about carbs and Reed blocks as well. For now will be going with stock Reed cage with 2 stage reeds. It was pretty tempting to go with the set up in this picture though.View attachment 185621

Looking good, for running a long bar, the stock reeds and carb is probably best for torque

 

[p61 western]

Looking good, for running a long bar, the stock reeds and carb is probably best for torque

Reeds yes, but it will not have a fixed jet lol. Terry is pretty busy, so not sure when it will be done.

 

[Bigmac]

Reeds yes but it will not have a fixed jet lol. Terry is pretty busy, so not sure when it will be done.

Good deal, fully adjustable, and stock size? Or are you going a little bigger?

 

[p61 western]

Good deal, fully adjustable, and stock size? Or are you going a little bigger?

A little bit bigger, and might match the boot to the carb.

 

[Bigmac]

A little bit bigger, and might match the boot to the carb.

Copy, nothing wrong with that, the stock intake manifold can be opened up a touch along with the intake hole in the gas tank, not much, but it doesn’t hurt

 

[p61 western]

Copy, nothing wrong with that, the stock intake manifold can be opened up a touch along with the intake hole in the gas tank, not much, but it doesn’t hurt

I have a suspicion that the intake might change in the future, but we will see lol.

 

[redline4]

Sooo,
This thing running yet?

 

[p61 western]

Sooo,
This thing running yet?

Lol no Terry talked me into the v6 Reed set up and big hl carb,so that means more work. He also has some kart races he's going to.

 

[Bigmac]

Lol no Terry talked me into the v6 Reed set up and big hl carb,so that means more work. He also has some kart races he's going to.

Go big or go home! I am home right now

 

[ajschainsaws]

Well I talked to Terry Ives today. He has the block bored and piston made. He also cut the boost ports like a 797. I will be going to his house on Monday to bring parts for assembly. Getting pretty excited now.

I missed this thread have too do some reading too catch up

 

[ajschainsaws]

Don't think I shared it here, but this is the bar I got for the 125.View attachment 185070

That is one Hoe of a bar one you couldn’t refuse