Building a SP125C / 101B Kart Saw

[cpr]

I love the exhaust blowing leaves on the ground around.

 

[leeha]

Nice vid Ambull.
If i tried to start my 101's that way, I would
dislocate my arm. I ain't got the umph you got.




Lee

 

[blsnelling]

OK Brad, I put together a vid to show how I start a 101B Mac. This one is .050 over, 129cc, no decomp. It has fresh rings, and I notice the compression has been on the rise, as it is getting harder and harder to turn over. Not the best cut, as I realized the filter was dirty after I made the cut.

You da man, drop starting 129cc of high compression kart motor

 

[ozflea]

Just read this thread from start to finish hmmmmmmmmmmmmmmmmmmmmmm still got a way to go yet fellas !!!!!!!!!!!!!!!!!!!!!!!!

McBob

Oh Cahoon that 101 cylinder you have with the decompressor drilled in from the side is factory came from a 101 M/C

McBob.

What looks like a stock 125c ......................

 

[MechanicMatt]

Ambull, watching you find TDC reminded me of how I used to have to start my favorite FourWheeler. Honda 250R, bump that kick start to TDC than let her rip. Thats saw rips:msp_thumbup:

 

[blsnelling]

Just read this thread from start to finish hmmmmmmmmmmmmmmmmmmmmmm still got a way to go yet fellas !!!!!!!!!!!!!!!!!!!!!!!!

McBob

Oh Cahoon that 101 cylinder you have with the decompressor drilled in from the side is factory came from a 101 M/C

McBob.

Hey McBob, thanks for stopping by

 

[rwoods]

Brad, make sure you watch McBob's video. It is that thunder from downunder that inspired me to start gathering parts for a copycat build. Ron

 

[cpr]

Brad, make sure you watch McBob's video. It is that thunder from downunder that inspired me to start gathering parts for a copycat build. Ron

Me, too. Coupled with getting the 91s, it derailed my first kartsaw build.

 

[blsnelling]

I'll be building the other 125/101 before I build mine. I painted this part of the case tonight so that I can assemble the engine.

 

[blsnelling]

I contacted Boyesen today about reeds for these saws. As mentioned earlier in the thread, they wanted a tracing. I figered a scaled scan would be even better. Here they are for anyone that needs this info.

 

[ozflea]

Ignition on mine is electronic off a Ryobi whipper snipper no rev limiter and no points great and simple

McBob.

 

[rwoods]

Ignition on mine is electronic off a Ryobi whipper snipper no rev limiter and no points great and simple

McBob.

Thanks for the additional info. Except for an overbore my 101B block will be stock. I may add a DSP to the head. I haven't found a carb to fit in the cutout air box so I may be forced to depart from your design. I have a BDC16 and both a sloper and a straight intake. Ron

 

[Ambull]

Nice vid Ambull.
If i tried to start my 101's that way, I would
dislocate my arm. I ain't got the umph you got.




Lee

Hey you ripped the cord right out of yours up in Maine..... At least it was the cord and not your shoulder.

These saws truly are "Tim the toolman Taylor" style.

 

[ozflea]

Thanks for the additional info. Except for an overbore my 101B block will be stock. I may add a DSP to the head. I haven't found a carb to fit in the cutout air box so I may be forced to depart from your design. I have a BDC16 and both a sloper and a straight intake. Ron

The BDC 16 is an alkcy carb the BDC 14 a petrol carb with a single pump double on the 16

McBob

 

[Dennis Cahoon]

Just read this thread from start to finish hmmmmmmmmmmmmmmmmmmmmmm still got a way to go yet fellas !!!!!!!!!!!!!!!!!!!!!!!!

McBob

Oh Cahoon that 101 cylinder you have with the decompressor drilled in from the side is factory came from a 101 M/C



Might well be a 101M/C block.....Can't say for sure.......it has no numbers......but for sure a Double A crank.

 

[husq2100]

Another National winning kart builder is Dave Liberton, from Phoenix AZ. I bought 2 stock 101B's from him in the 90's that came off Israeli drones. I also bought his personal 101B that he won a national race with. He claimed it dyno'ed at 22hp.

Dennis, at what RPM make 22hp the 101b does?????? :hmm3grin2orange:

hope the family and labs are well mate

 

[blsnelling]

I'm looking for input for the color scheme on my saw. Correct me where I'm wrong, but weren't original colors a red rear shroud, blue flywheel cover, and black recoil? I'm a big fan of patriotic red/white/blue, and would like to throw some white in the mix somewhere. I like chrome too. I'm just not sure how to put it all together.

 

[cpr]

The red/blue was the '76 centennial. The rest were typical mac color-of-the-day. Yellow, black, chrome. I think there were some white m's.

 

[ozflea]

I'm looking for input for the color scheme on my saw. Correct me where I'm wrong, but weren't original colors a red rear shroud, blue flywheel cover, and black recoil? I'm a big fan of patriotic red/white/blue, and would like to throw some white in the mix somewhere. I like chrome too. I'm just not sure how to put it all together.

Red cylinder shroud blue fan housing and blue starter housing and used a special decal of red white and blue i have them here for mine but i haven't seen any on ebay for ages.

Called American Racing Engines

I'll snap a pic of the sticker today if my batteries ain't flat and post it here.

McBob

 

[rwoods]

Colors

Here's my first kart saw:

Blue flywheel cover, Red shroud, Yellow crankcase cover.

Here's my 101B for my build:

Red flywheel cover. Silver shroud, unpainted crankcase cover.

Ron