have 4000 on my 89 flhtc rebuild and the base gaskets are weeping...i heard somewhere about a "planing plate" for the bottom of the cylinder,that the cylinder warps a lil and needs to be leveled back down? anyone know of this? i think strock makes the honing plate but i cant find it anywhere...any help?

 

Some info here http://www.harleychatgroup.com/forum...s-gasket-leaks

 

If it is Flat... Proper warmup is essential!! The "sandwich" needs to be sealed....

 

^^^ This ^^^

 

proper warm up like was said above. i let my 85 warm for 4-5 minutes.

 

 

Not sure what you used for base baskets but Cometic or James steel gaskets work the best.
A friend of mine had his motor rebuilt at a shop and it weeped immediately.
5 years later I put some Cometic gaskets in for him and the weep went away.

 

My cylinders are off at Hillside at this very moment. Among all the other stuff they are doing, I am having them dress the gasket surfaces. Doing that right means getting the bottom dead perpendicular to the bore and dead flat (of course).

The perpendicularity is the only thing about these honing blocks that would give me concern. If you've got one side of the cylinder a few thou higher than the other, it will still be out of perpendicular after the surface is flat. The difference probably doesn't matter much, but if you're going to true up your cylinders, you may as well do it right.