Topic: Sealant on 750 head gasket or not ?

[754]

Two problems, I will have a hard time lifting it in  no time to make a C frame.
I have a 20 year old sons by the time he gets to helpingm we will have frost on the ground.
Second,  I have no idea of what is done to the the spare motor, it appears to be rebuilt and fresh, 
 But this Punk does not feel lucky...... but I just don't know.
Then there is top end refresh, it really should only take a few days.  Right ?

[scottly]

Then there is top end refresh, it really should only take a few days.  Right ?

If it was that easy, it would already be done.

[Stev-o]

Time is not on your side.
Frank should be off the forum until motor is running!

[markreimer]

Done three top end's on CB750's, all with a dry head gasket. I used a Cycle-X kit. I used Hondabond on the base gasket along the lower front edge, and on the pucks under the cam towers of course. Everything else went on totally dry. The only time I've had a leak was along the valve cover, once.

[RAFster122s]

Sounds like that sleeve to lead to piston wear or worse...I would think about changing that sleeve.  I agree with Scott, go with different motor.  Can spare motor be started out of a bike to see how it runs?  How difficult and how much time to test run it?

Do you have a cradle to bolt a motor to a motor stand or something capable of keeping it upright while running?

It might be worth a risk if pulling oan to inspect from below looks good and nothing is out of place on the top end pulling the cover to take a peak at the rockers and valve ends and the cam.  That doesn't take more than 90 minutes if everything is laid out and at hand.  Take plenty of pics in case you want to review it again later.

Spare motor has good compression and runs well, then go for it.  Bribe son with new xbox game if he is into that or a pizza or two...  something that motivates him to help.

Good luck!

David

[tlbranth]

Frankie. Get that mofo running. No excuses - we have beer to consume, untrue stories to tell......

[754]

Head is on, torque it tonight, stock cam going in tommorow,  Might  be Running Friday night .

[scottly]

If it isn't running and ready to go by tomorrow night, throw it in the back of a truck, and we'll work on it in Delores.

[754]

Quick Q .. the 6    6 millimeter bolt from head to cylinder, is it 6 to 8 ft lbs torque ?

[scottly]

6 to 8 ft lbs sounds about right, but don't go over 8.

[PeWe]

I tighten all M6 with 10Nm (7,37 ft lbs)