Topic: Sandcast difference question

[Doum]

I bought a lot of mixed parts this week end,many make,model.....In the lot I have a big box full of cb750 engine cover.About 10 mission cover,10 clutch cover,some valve cover....I have a clutch cover for he sandcast model,and a mission cover too (according to the sandcast website),so I think I have a valve cover too.I havea different one.Under the breather cover,the casting have a round shape that cover the timing chain,between this round casting and theshape of the cover,there is no brace,ALL other I have have a brace in the casting.Someone know if there is  difference for the sandcast valve cover?

[Greggo]

The very very early ones had cross hatching marks from the mold underneath...but I'm talking about the first hundred bikes.

[Doum]

Where thoses marks can be seen on the cover?

[markb]

They are on the inside.  Here’s a pic of mine before it was cleaned up.  Very rare.  I'll have to get a shot of it now that it's clean.

[Doum]

Thanks! If you take a picture,take one on the other side to see over the cover

[754]

I call it the waffle valvecover..
There is differences in the breather cover and what is underneath it,have seen a few different things in that cover and underneath..

[markb]

Here ya go.

[Stev-o]

Nice looking waffle...