Can you overtorque the crankcase screws?

John Lusignan /

Can you over-torque the crankcase screws? With the cases assembled and yama-bonded together both my crank and transmission spin freely. As soon as I tighten the 10 crankcase screws the crank still spins freely but the transmission gets a bit tight. It's not bound up where it wont turn at all but takes a fair amount of torque to turn it by hand. Is that normal?(edited)

Re: Can you overtorque the crankcase screws?

yer tightening them in a criss cross alternating pattern, right?

Re: Can you overtorque the crankcase screws?

Something's wrong. Don't torque it together until you find what bearing or shim isn't seated. Make sure a needle bearing didn't lose a needle or some debris is in the way.

Re: Can you overtorque the crankcase screws?

John Lusignan /

yes

Re: Can you overtorque the crankcase screws?

Could try to shock the shafts bearings into place by placing a piece of 2x4 pine on it and whacking them with a hammer (not beat them to heck but a good rap)

Re: Can you overtorque the crankcase screws?

> Rebel Moby Wrote:

> -------------------------------------------------------

> Could try to shock the shafts bearings into place by placing a piece of

> 2x4 pine on it and whacking them with a hammer (not beat them to heck

> but a good rap)

Ive done this^

With wood or a brass hammer.

Re: Can you overtorque the crankcase screws?

John Lusignan /

Thanks everyone! It was the drive bearing. It wasn't seated all the way. I put a few shop rags on top of it and then used a pine 2x4 and a 4lb sledge to take about 5-6 good whacks at it. I had measured with the calipers and it moved about .5mm down into the seat. bolted the cases back together and that did the trick! Thanks again!

! Congrats!

> John Lusignan Wrote:

> -------------------------------------------------------

> Thanks everyone! It was the drive bearing. It wasn't seated all the

> way. I put a few shop rags on top of it and then used a pine 2x4 and a

> 4lb sledge to take about 5-6 good whacks at it. I had measured with the

> calipers and it moved about .5mm down into the seat. bolted the cases

> back together and that did the trick! Thanks again!

Good job! Congrats!

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