Building a 390XP Monster

[Jacob J.]

I thought I had taken the same amount off of the flange as I did the base, I either did not, or didn't account for the loss of the base gasket. I don't know how many of these I've done by taking the same amount off both surfaces and have never had this problem.

I did the same thing on a 385 once. I had the base turned but forgot to to do anything with the flange. The flange bottomed out ever so slightly and created an air leak.
I burned up a new OEM piston and rings. The saw didn't leak air until it was at the hottest operating temp and by then, it was too late.

 

[FATGUY]

I wonder why Husqvarna has them and Stihl only does on certain models. What is their function?

 

[Jacob J.]

I wonder why Husqvarna has them and Stihl only does on certain models. What is their function?

Piston stability at high speeds and air flow contour.

 

[HEAVY FUEL]

Piston stability at high speeds and air flow contour.

Jj I used to think pretty highly of you until you took Beeker down as your avatar, now I'm not so sure you can be trusted.

 

[Jacob J.]

Jj I used to think pretty highly of you until you took Beeker down as your avatar, now I'm not so sure you can be trusted.

Oh well, I guess I can live with that...

 

[Mastermind]

Oh well, I guess I can live with that...

Who are you?????? And what have you done wit muh friend JJ???????

 

[HEAVY FUEL]

It's not about you JJ, its about us!! LOL!

 

[blsnelling]

Today is a strange day indeed. I boxed up my 390 to ship to someone else to work on it! Along with it went a new cylinder. It's getting a 2-piece head and a right hand pipe, similar to the one TW built for the 361 below. I've wanted to build a pipe saw for a long time, and it's finally happening. A big thank you goes out to a couple forum members that are helping me out with this project! You know who you are
[video=youtube_share;CoUai22tD7g]http://youtu.be/CoUai22tD7g[/video]

 

[tree monkey]

how are you going to flush cut stumps with a right hand pipe?

 

[blsnelling]

how are you going to flush cut stumps with a right hand pipe?

Guess I'll have to dig a big hole in the ground

 

[Mastermind]

I hope it's ready in time for you do bring to TN in June. I bet it'll be a hoot to run.

 

[blsnelling]

I hope it's ready in time for you do bring to TN in June. I bet it'll be a hoot to run.

If it turns out anywhere near as good as your 064, I'll be tickled pink!

 

[Trx250r180]

next you will be taking a twin cyl banshee and making a bike saw

 

[blsnelling]

Only in my dreams. I don't have the experience or knowledge to build something like that.

 

[Trx250r180]

Only in my dreams. I don't have the experience or knowledge to build something like that.

i want one of those trx 250 saws mr cahoon built for my collection ,that things a piece of art

 

[zogger]

i want one of those trx 250 saws mr cahoon built for my collection ,that things a piece of art

--have you actually tried using one of those bike saws for regular wood cutting?

I know that is a borderline silly question, but I was still wondering.

A 250 has to be pretty heavy regardless, but something like a 125 might be doable.

 

[Trx250r180]

--have you actually tried using one of those bike saws for regular wood cutting?

I know that is a borderline silly question, but I was still wondering.

A 250 has to be pretty heavy regardless, but something like a 125 might be doable.

it would be a toy / shelf queen ,they are good for a couple cuts then get too hot ,i have plenty of saws for reg cuting

 

[Dennis Cahoon]

Today is a strange day indeed. I've wanted to build a pipe saw for a long time, and it's finally happening. A big thank you goes out to a couple forum members that are helping me out with this project!

Hahahahahaha!........Bradley, you're flushing your money down the drain.

 

[MCW]

Guess I'll have to dig a big hole in the ground

Don't worry Brad, the exhaust gasses will do that for you

 

[MCW]

it would be a toy / shelf queen ,they are good for a couple cuts then get too hot ,i have plenty of saws for reg cuting

Surely you can mount a radiator and a small thermo fan on it somewhere for more sustained cutting?