Head gaskets on old bikes

I have an 2 old motocross bikes with Sachs 125 2 stroke engines. I've
found almost no parts for these, but I think I can get one running bike
between the two engines. My question is, what can I do about the head
gasket if I can't find a new one? Is it possible to make a new one
myself out of some material from an auto parts store, or can I use the
old one and seal it somehow?

 

You can't use sealer on the gasket.

Go here:

http://www.headgasket.com/gaskets.html

They can make a new one for you if they don't have it in stock
It isn't going to be cheap.

Keep an eye on Ebay, for example auctions 330001451532
and 260000715397 might be of interest

Keep in mind that these are restoration pieces. It is an absolute
certainty that you could sell what you have and take the money
plus all the money you would spend getting this one running and
buy a newer used dirt bike that would work a lot better. If you
don't have all the tooling to take apart the engine and put it
back together, you need to sell this to someone who has. This
isn't a project you can complete with $100 of the most commonly
used tools from Sears.

Ted

 

If the gasket isn't in bad shape, you may be able to liven it enough
to be reused by coating both sides with aluminum spray paint, which
has a high aluminum metal content. If you try this, che3ck it closely
for leaking after installation.

 

If the old gasket is solid copper (as many older 2-strokes
used) you can anneal it and re-use.

 

I made them from Alu-sheet a bit thicker than the one used in the kitchen.

Herman.

 

Or just heat it cherry red with a propane torch then drop it into a
bucket of water if you'd rather not heat up the house.

 

Or do it properly, without using a torch or quenching it.

http://www.headgasket.com/preinstall.html

Les

 

I read the whole thread. The point is you don't anneal copper by
quenching it. Just heat it and let it cool. Using a torch isn't best,
due to uneven heating.

 

Yes it was. My reply was to emmbeedee, then you added your bit about me
needing to read the whole thread. I'm paying attention, are you?

 

i had some special head gaskets made bu LUBBOCK GASKET co. for my fiat osca.
they did a real creditable job.
even better, if you ship the old one, they can copy it very well.
good luck, sammm