075/076 build project for racing

[Cut4fun]

Never seen a 075 run like your modded video one CJ wtg. Nice!!!!!!!!!!!!!!

Only ran 075 076 stockers at gtg's that other folks owned.

 

[mdavlee]

It's running good. Need a shorter bar to be able to do quicker changeovers

 

[Chainsaw Jim]

I'm trying to get the chain right for the short bar. The rakers are way too low and I need to take the teeth down far enough to get a good gap back. The race I want to enter runs two cuts on a 20" fir log so I've been focussing on the longer set up for the moment.
I have absolutely no experience with race cutting. This is literally the third or fourth time I've ever ran a three cut.

 

[Adirondackstihl]

That thing will sing with a 20" roller nose

 

[Chainsaw Jim]

A little luck, a few miles drive and $20 brought this thing into my shop...

Now I need to get a flange welded up and try this thing on.

 

[Chris Zautner]

A little luck, a few miles drive and $20 brought this thing into my shop...View attachment 29771 View attachment 29772

Now I need to get a flange welded up and try this thing on.

Now we're talking. Can't wait to hear her run with a pipe!

 

[Frank bierce]

A little luck, a few miles drive and $20 brought this thing into my shop...View attachment 29771 View attachment 29772

Now I need to get a flange welded up and try this thing on.

That is gonna be a great sound!! Can't wait!! .
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You done yet??

 

[jake wells]

im growing a beard waiting on the vid jim bob.

 

[Adirondackstihl]

RM125 or CR?
Nice pipe.
Fatty pipes are designed for low end grunt.

 

[Chainsaw Jim]

RM125 or CR?
Nice pipe.
Fatty pipes are designed for low end grunt.

KTM.

I'll have to lop off a good inch or so when I weld the flange on it to get some more high end.

 

[Chainsaw Jim]

I ended up finding some good springs to tension up the idle and jet screws. The intake stack is almost done. I couldn't find a piece of aluminium tube large enough so until I do I'll try it out with the available metal pipe in pics.

 

[JT78]

I've wanted one of these for a while been waiting to see somebody build one that cuts like this one. You got a really fast saw there.

 

[Chainsaw Jim]

I added that kart motor carb to it and the improperly supported intake lost its bond with the bottom base piece just after getting a rough tune. I knew i should have used a different method but i figured I'd give the ol jb weld a chance.
Hell the rubber on the elastostart even broke on this go round.

 

[Chainsaw Jim]

I'm giving up on that stupid idea for the intake using the stock composite block. It doesn't like to bond very well to jb weld. It's time for a metal flange welded together with a short piece of pipe so i can use a rubber boot. The vibration is so intense that the high jet screw cannot be held to tune while wot.

 

[mdavlee]

Probably a good idea on a saw like that.

 

[Chainsaw Jim]

Yeah the high screw is large enough to turn by hand and it feels exactly like trying to grab one of those oscillating blades while at full speed. There is no way you're holding a screwdriver up to it. Not even with a rubber sleeve to hold it on.