CL crankshaft with an electric starter

teazer · Post by **teazer** » Sat Jun 05, 2010 8:56 pm

LM,

Do you have any of those ball bearings in stock to sell? I need one for a crank that is water damaged where the rollers run. It's bad enough to preclude using a roller bearing but not so bad that I can't press on a ball race.

TIA

G-Man · Post by **G-Man** » Sun Jun 06, 2010 2:43 am

Teazer

Here's the bearing on my C72 crank. No oil hole in the bearing - just a locating peg hole in the outer race. This is where my original crank post began. This is a for a motor with a starter clutch but it has no oil feed / return.

Is it a) for a CL77 type 2?

or b) did the presence of a ball race mean that the starter clutch get lubricated a different way?

I have not stripped my C72 motor yet but I suppose the answer is in there......

If this arrangement does work for a C72, does that mean that to convert a CL motor to electric start the easy answer is to install a ball race in place of the roller?

G

LOUD MOUSE · Post by **LOUD MOUSE** » Sun Jun 06, 2010 4:00 am

I give up!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!. ..........lm

G-Man wrote:Teazer

Here's the bearing on my C72 crank. No oil hole in the bearing - just a locating peg hole in the outer race. This is where my original crank post began. This is a for a motor with a starter clutch but it has no oil feed / return.

Is it a) for a CL77 type 2?

or<<<<<<<<<<<<< b) did the presence of a ball race mean that the starter clutch get lubricated a different way?>>>>>>>>>>>>>>>>>

I have not stripped my C72 motor yet but I suppose the answer is in there......

If this arrangement does work for a C72, does that mean that to convert a CL motor to electric start the easy answer is to install a ball race in place of the roller?

G

G-Man · Post by **G-Man** » Sun Jun 06, 2010 6:42 am

LM

Sorry, I meant starter sprocket.

G

LOUD MOUSE · Post by **LOUD MOUSE** » Sun Jun 06, 2010 7:30 am

The oil to the sprocket never has anything to do with what type bearing is on the shaft.
Ya have the parts and ya can see the path if ya look. .................lm

G-Man wrote:LM

Sorry, I meant starter sprocket.

G

Superchicken · Post by **Superchicken** » Sun Jun 06, 2010 9:18 am

Think about it this way, in the area of where the hole is, the crank shaft is hollow. It is possible to use a piece of wire to feel between the crank half's to see it is hollow. If your crank is hollow the you can make a hole down to meet that hollow ness. Now you instant oil taped into crank case pressure, witch will bring oil to the sprocket bushing. If by some chance you don't fin the hollwness, just solid, you can not drill, I don't think you will find it this way, my CL crank was hollow and I put a hole in it. That is the oil for that bushing and it is hard to keep it from leakiing!! on the ground

teazer · Post by **teazer** » Sun Jun 06, 2010 10:01 am

Superchicken,

If I understand that last thread, you are suggesting that it's crankcase pressure that is forcing an oil mist into the shaft and that is what is lubricating the sprocket. With both sides of that shaft open to the same crankcase pressure, I'm not sure how that works.

My interpretation was that the oil pumped through the roller bearing was then flowing through the sprocket and out through the hole in the shaft.

Either way, it is not hard to drill a crank to make a CL crank look and work like a CB crank regardless of what that flow pattern is.

The NOS CL crank I have here has a needle roller bearing on the alternator end. That means on a CL the oil flow is in from the top of the crankcase to the bearing and out the inner side into the crankcase.

If the ball bearing does not have an oil drilling, it must be lubricated by oil mist the same as the other side. Interesting