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Author Topic: HolmenTree Bikesaw Resurrection  (Read 7330 times)

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Offline pete

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Re: HolmenTree Bikesaw Resurrection
« Reply #220 on: December 28, 2019, 08:11:31 pm »
So Smooooooooooth if that was the finish on it twenty years ago it would only be because of a lot of hand work now with the modern machines its like make it bung it on the saw or bike as its ready to go
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Offline HolmenTree

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Re: HolmenTree Bikesaw Resurrection
« Reply #221 on: December 28, 2019, 11:44:07 pm »
Quote from: pete on December 28, 2019, 08:11:31 pm
So Smooooooooooth if that was the finish on it twenty years ago it would only be because of a lot of hand work now with the modern machines its like make it bung it on the saw or bike as its ready to go

Yes it's pretty amazing technology alright?
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Offline HolmenTree

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Re: HolmenTree Bikesaw Resurrection
« Reply #222 on: January 15, 2020, 12:25:31 pm »
Quote from: HolmenTree on November 21, 2019, 02:18:15 pm
I made my decision on the drive sprocket setup for the YZ125 bikesaw.
I can buy a CNC billet sprocket with built in hub flange but they are heavy, I definitely will put one on the bigger CR250R but for the little YZ125 it defeats my lightening purpose.

So I just happened to find this NOS Sandvik 12T .404 .063 harvester sprocket on Ebay and also this 73mm x 30mm chunk of GR5 titanium for $20 out of Israel of all places!
Now I got the chore of finding a machinist who can make this titanium into a hub adapter for the sprocket and rope spool.

12T .404 is equal in diameter to a 13T .375
I always ran a 11T .375 on the YZ but always wanted to upgrade to a 13T for the "18 fat belly .050 bar.
Plans are to put 46RST HT cutters on a Oregon 50AL .404 .050" chassis.
Originally thought about a high tooth .375 with Stihl 33 Topic Super chassis but I think risk of snapping it would be high .
Here's the pics.




So on the continuing saga about my harvester rim sprocket for the YZ125 bikesaw(for those interested in building one for their hotsaw)
The ebay vendor sent the wrong one that I ordered but then it turned out it was the one I should be using.
They sent me the one I ordered and I was told to keep both.
On comparing the two one is a .063" and the other on the right is a .080".
So the first one they sent me the
.063 I will use for my .050/.404 chain.
The titanium piece came from Israel and when I showed it to my machinist he said no problem putting it on the lathe and making a sprocket hub adapter and rope spool.

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Offline pete

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Re: HolmenTree Bikesaw Resurrection
« Reply #223 on: January 17, 2020, 06:15:31 pm »
The Luck of the Irish must be riding with you order the one you think is right they send you the wrong one which is right and you get your original order of the wrong one  which you thought was right thrown in for Nix this is gonna be a lucky saw  i would paint a shamrock on it
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Offline HolmenTree

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Re: HolmenTree Bikesaw Resurrection
« Reply #224 on: January 17, 2020, 06:48:57 pm »
Quote from: pete on January 17, 2020, 06:15:31 pm
The Luck of the Irish must be riding with you order the one you think is right they send you the wrong one which is right and you get your original order of the wrong one  which you thought was right thrown in for Nix this is gonna be a lucky saw  i would paint a shamrock on it

Thanks Pete. I am 50% Irish and I do have a very good feeling on the out come of these 2 saws.
The 125 Yamaha will be a little banshee and the bigger 250 Honda will be more of a lugger, as long as I keep exhaust duration under 190°.
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Offline pete

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Re: HolmenTree Bikesaw Resurrection
« Reply #225 on: January 21, 2020, 07:08:23 am »
I dont understand a lot of the technical stuff about your saw builds but I do enjoy the creativity and the actual builds they to me are like sculptures and works of art A weird way to describe your work just my way of looking at them great stuff and I am enjoying following the progress cheers
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Offline HolmenTree

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Re: HolmenTree Bikesaw Resurrection
« Reply #226 on: January 21, 2020, 09:21:11 am »
Pete, sculptures is a good point. Maybe my years of chainsaw sculpturing logs can be related.
To build something from scratch I think takes a vision of the end result before even starting to build the project.
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Offline HolmenTree

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Re: HolmenTree Bikesaw Resurrection
« Reply #227 on: January 22, 2022, 09:46:37 am »
Hello guys, I forgot about this thread probably due to FB, Lol. So time to update.

This Covid era now going into the 3rd year has definitely been a positive for projects in the saw shed.
Besides the 1982 YZ125 and 1983 CR250R I have added a third bikesaw project,  a 1984 CR500R.
I got everything covered now regardless of cc class.

The 500 is being built primarily for the 27"-33" wood single cut hot start  events which appear to gaining more attention lately after going idle for a decade or so. Big concern for competitors is the extra torque and wood size breaking chains making very dangerous projectiles around a gathered audience.

Going well past 2 years now with the R&D and part gathering of my projects but I don't just hap hazardily slap something together,  more like a focused OCD type of style I like doing.
I'm enjoying the moments ;D

This early spring the saws will be in the wood testing for summer's competitions.
The CR500R may be a bit later, but not by much.
Now to post some pics but first I'll see if they are small enough to post. If not I'll post in the next post.


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