bike saw in the works soon

[begleytree]

ok, a dirtbike/cart racing friend of mine has agreed to sell me an engine. well, give. $25 is give in my book. starting small, its a 125cc with a pipe and 2 carbs. both carbs are jetted for alky, going to rejet one carb for gas for practice and such.
he ran it on a cart and it ran pretty good (still does). he bought another engine and I'm getting the old one thursday-ish.
will post pics when I get it. then start bothering everyone on how to go about it the easiest way. no I'm no big racer like some other guys here. It most likely will get built and ran a bit, then sit around until someone offers to pay me not to trip over it anymore.
-Ralph

 

[rb_in_va]

Sounds like a great deal, but personally I would prefer it in cart form.

 

[begleytree]

lol! why?!
racing to me involves a straight line and big engine!

so for me it's a good starter project to fool around with. it's modded running alky and pipe. dyno'd at 16hp (he says). what size sprocket should it pull well? running 404-063? 10 pin? 12 pin? surely not bigger but what do I know!
-Ralph

 

[Jacob J.]

Do you know which model it is or have pictures of the engine?

 

[begleytree]

should have all that thursday

 

[troutfisher]

what size sprocket should it pull well? running 404-063? 10 pin? 12 pin? surely not bigger but what do I know!
-Ralph

My RM125 project, I guessed at a 14 pin harvester sprocket. I haven't started it yet, so I don't know how it's gonna work out.

 

[begleytree]

My RM125 project, I guessed at a 14 pin harvester sprocket. I haven't started it yet, so I don't know how it's gonna work out.

14??! wow.

I was thinking 404-063 harvester bar too. baileys has them at $60 and I can set the saw to the bar, not the other way around, right? I mean, if I have to add the studs and all, I can add them wherever I need them to fit the bar I choose.
at least I think so.
would 3/8-050 be a better choice than 404-063? worried about breaking chain.
-Ralph

 

[Cut4fun]

Cool Ralph, trip on it long enough so I can check it out someday.

 

[begleytree]

Cool Ralph, trip on it long enough so I can check it out someday.

actually planned to sell it to you when its done!
-Ralph

 

[Cut4fun]

No bikesaws for me.:hmm3grin2orange: but a 140cc husky would be nice.
funny how many people that laughed at modded saws own them now even with pipes LOL. :hmm3grin2orange: :hmm3grin2orange:

 

[begleytree]

yup. I'm trying to be like my hero. big saws, big pipes!
-Ralph

 

[Cut4fun]

Both of these are forsale. save you alot of time.

 

[Cut4fun]

yup. I'm trying to be like my hero. big saws, big pipes!
-Ralph

:hmm3grin2orange: :chainsawguy: :hmm3grin2orange: :chainsawguy: :hmm3grin2orange:

 

[sILlogger]

Both of these are forsale. save you alot of time.

but, but, but.....WHAT are they????:monkey:

 

[begleytree]

Kev, those are some nice looking saws!

for me, the real fun will be building it and running it a little!
-Ralph

 

[chainsawjunky]

My RM125 project, I guessed at a 14 pin harvester sprocket. I haven't started it yet, so I don't know how it's gonna work out.

Nice saw, wish I had some equipment to do that(gathering it though). Evan

 

[redprospector]

Ralph,
I have a friend who runs a Kawasaki kx125. He runs 3/8 50 and I haven't seen him break a chain yet. He is running a 12 pin sprocket, and it cuts not too far behind the 250 bike saws in smaller wood. Romeo would be a good one to question about getting the bar & sprocket mounted, he built my kx250. Good luck with it.

Andy

 

[troutfisher]

Ralph,
I have a friend who runs a Kawasaki kx125. He runs 3/8 50 and I haven't seen him break a chain yet. He is running a 12 pin sprocket, and it cuts not too far behind the 250 bike saws in smaller wood. Romeo would be a good one to question about getting the bar & sprocket mounted, he built my kx250. Good luck with it.

Andy

wow, maybe I'd better re-think my sprocket. I'm using .404 x .063. It's not too late to change, nothing is welded yet............

 

[romeo]

wow, maybe I'd better re-think my sprocket. I'm using .404 x .063. It's not too late to change, nothing is welded yet............

I don't think that its too big. When you get her running, run the chain with shallow rakers and let the chain speed do the work. I found 14 pins to be a little to small for anything 250cc and up, I like 16 pins for the 250's. When I was running the 14 pin on my 280, I could stand on top of it then ride it to town when I got through the log.

The 125 Andy's talking about is a freaky high RPM job that was built by Larry Jones. That saw relies on black magic to get the chips out but that saw terrorized Colorado Arizona and New Mexico for years. When I built my first bikesaw I thought it was the fastest thing on earth until my first show, luckily, Larry took it easy on me and only beat me by 50% of my time
Here is an old video of Larry running ithttp://www.zippyvideos.com/6874716245989836/eagarlarry/*captainstupid

 

[romeo]

14??! wow.

I was thinking 404-063 harvester bar too. baileys has them at $60 and I can set the saw to the bar, not the other way around, right? I mean, if I have to add the studs and all, I can add them wherever I need them to fit the bar I choose.
at least I think so.
would 3/8-050 be a better choice than 404-063? worried about breaking chain.
-Ralph

Carts are a strange area, kind of like half bike/ half chainsaw. Most of the ones I have seen run 3/8 with 10 to 12 pins and push 15K to 16K. I don't know of any carts running .404 but we don't have too many cart saws around here. The cart motors seem to push higher rpm's and less torque than the bikes in there natural form.
I'm sure it would turn the .404 just fine with the right gearing (I would start with a 12 pin) and the good side is that harvester parts are cheap and plentiful not to mention strong. At first I was modifying the bars to fit the saw, learned my lesson, now I fit the saw to the bar. Its nice to be able to order a bar and bolt it on without wearing out a bunch of grinder wheels.
By the way, automotive wheel studs make nice bar mount studs.

There is no real way to know what you will end up with until its done. And when you found you made a mistake you can always re-build it.