Mcculloch sp125/101b kart saw build thread

[Bigmac]

Got my prototypes back from the welder
Two different angles

 

[Steve]

Got the call from Terry today, as it turns out the rod was bad, And as things would have it, Mike basically twisted my arm again and I chose to go with the built rod!

He said I should have it back by Wednesday!

Good job Mike!

@p61 western

 

[p61 western]

Good job Mike!

@p61 western

Anytime lol.

 

[p61 western]

Got my prototypes back from the welderView attachment 201040
Two different angles

V6 set up next?

 

[Bigmac]

V6 set up next?

I wish! If I build that saw it won’t have a normal tank!

 

[p61 western]

I wish! If I build that saw it won’t have a normal tank!

Normal just cut a little bit lol.

 

[Bigmac]

Normal just cut a little bit lol.

Ya, but I also don’t have another tank either, so some fabrication would be required! If I ever go that way, I would like to fab something up, and go all in! Lol

 

[p61 western]

Ya, but I also don’t have another tank either, so some fabrication would be required! If I ever go that way, I would like to fab something up, and go all in! Lol

Or all out lmao.

 

[Bigmac]

Or all out lmao.

Hahaha truth! Probably not going to happen anyway, have Enough to keep busy as is! Lol

 

[Bigmac]

Got some work done on the manifold, I still have to put an impulse barb on it and the mounting tabs for the shroud but it’s coming along

 

[Bigmac]

Did a little bit of mock up today with some scavenge parts, LOL things are super tight but I think it’s going to work well

 

[Steve]

Did a little bit of mock up today with some scavenge parts, LOL things are super tight but I think it’s going to work wellView attachment 201175View attachment 201176 View attachment 201177View attachment 201178

That looks great so far Nathan!

 

[Bigmac]

Here’s a better pic, I actually will have some room to make the intake manifold taller, on this prototype I am just going to use a spacer for the reed cage, I am waiting on the machinist, to make the boot adapter, I am pretty excited that I have a little bit more room than originally planned the higher I can get the reeds, the less restriction there will be in the transfer tunnel, with the cage placement its fine, but even an 1/8 of an inch would make me happy, and better for a bolt on.With the current set up, chamfering the cylinder liner a little would compensate for any restriction

 

[jacob j.]

Looking good Mr. N., that fabricated manifold is a lot lower and thinner than the similar manifolds built by Horstmann and GEM. The commercial one would not fit under the stock
air box at all.

 

[Bigmac]

Looking good Mr. N., that fabricated manifold is a lot lower and thinner than the similar manifolds built by Horstmann and GEM. The commercial one would not fit under the stock
air box at all.

Thanks, I have been planning it for a while now, lots of measuring and mock up, I think it’s going to work out, everything is so tight, a degree or two or a 1/16 of an inch one way or another and it doesn’t fit well at all!

 

[sawfun]

Thanks, I have been planning it for a while now, lots of measuring and mock up, I think it’s going to work out, everything is so tight, a degree or two or a 1/16 of an inch one way or another and it doesn’t fit well at all!

Yup, been there with the BDC fitment. A shoehorn job for sure. I think your WB project to be cleaner, easier, and much more appropriate for a work saw.

 

[Bigmac]

Got something in the mail

 

[Steve]

Got something in the mailView attachment 201510View attachment 201511 View attachment 201512

Wow! That was fast!

That rod looks sweet Nathan.

 

[p61 western]

Got something in the mailView attachment 201510View attachment 201511 View attachment 201512

Not going to lie, I was a little bummed when he said my rod was okay lol. Looks good glad to see you back at it.

 

[Bigmac]

Wow! That was fast!

That rod looks sweet Nathan.

Yes! Really quick!
As it turns out, someone had sanded the rod meeting surfaces and caused a big end to be out of round, and he was able to get right on top of it! I think if I do another one, I’ll just have him do the rod on that one as well it is pretty sweet and when you consider the cost of just bolts and his normal rebuild of the stock rod it’s not that bad. And probably good insurance policy for future failures!