In need of a thicker Base Gasket. Suggestions for Brand?

[Snickare]

I've had my motor rebuilt. Put it back in the bike and found it leaked on start-up. The base gasket was too thin, So Now I'm in need of a thicker gasket. I had bought the Athena gasket kit. Only now am I finding the problem with their base gaskets. if I need to buy a thicker base gasket, where do I go for a proper gasket? Anyone have a good suggestion for who makes the right one, and where to buy it?

Thanks for the help.

 

[VonYinzer]

What bike?

 

[Snickare]

Sorry, It's a 1982 CB750K DOHC

 

[VonYinzer]

All good. Try the local Honda dealer.

 

[Snickare]

Yeah. I guess you're right. The OEM gasket would probably be easiest.

 

[bradj]

This doesn't sound right I bet something is put together wrong or your missing a o ring or something

 

[Snickare]

What happened was this.

I got the motor back from my mechanic, installed it and started the motor. Oil poured out from in front of cylinder one and two. There was a pretty sizeable gap between the base gasket and the block.

Upon doing some research (googling..) I've found that people are noticing a difference in thickness from the Athena base gasket and the OEM gasket. My mechanic/friend has attempted now to lift the head and jugs while in the bike to avoid pulling the motor again. He's rechecked all his steps and based on a recommendation from a local Honda mechanic, he has applied a bead of RTV and then reassembled. Tomorrow, he'll torque things down and then try starting it to see if the problem is fixed.

 

[SONICJK]

regardless of the thickness of the base gasket there should never be a gap
Thinner base gasket, hell no base gasket, is a common modification to bump compression a bit, it just lowers the whole top end down on the piston by the thickness of that gasket (or lack there of)

You have bigger issues I'd say

 

[hillsy]

Block could be warped...or someone's used a screwdriver to try and pry off the block.....