What size allen key bolts for

[..]

the brake and clutch fluid reservoirs.

Previous owner has nearly stripped the heads.

Where do I get stainless steel?

[indybobm]

I believe that they are 4mm x 12mm flat head screws. Do you have a ACE Hardware close? Should be able to find stainless screws at most hardware stores.

[Patrick]

Are you able to get the old ones out ?

I find a hand impact to usually work in these cases.

A little never-seize works when putting them back in.

[..]

Are you able to get the old ones out ?

I find a hand impact to usually work in these cases.

A little never-seize works when putting them back in.

I got the brake ones out early Fri morning to bleed the front brakes before the FCR ride.

Reservoir looked like it had melted milk chocolate inside it   

Clutch fluid looks good but I'll be changing that as well.

Hate to imagine what the rear brake fluid might be like.

Then the coolant and strip the rear wheel to to get that lubed up.

Oh the joy of "new" old bike purchase.

[..]

I believe that they are 4mm x 12mm flat head screws. Do you have a ACE Hardware close? Should be able to find stainless screws at most hardware stores.

Thanks.

[hukmut]

Friendly suggestion: suck out the crud fluid, put in fresh and then bleed the system until it flows clear, brake and clutch.  Supposed to be done every 3 years or so. Brake fluid is hygroscopic. In other words, it attracts moisture, thus the crud.
Ride safe.

[Patrick]

Are you able to get the old ones out ?

I find a hand impact to usually work in these cases.

A little never-seize works when putting them back in.

I got the brake ones out early Fri morning to bleed the front brakes before the FCR ride.

Reservoir looked like it had melted milk chocolate inside it   

Clutch fluid looks good but I'll be changing that as well.

Hate to imagine what the rear brake fluid might be like.

Then the coolant and strip the rear wheel to to get that lubed up.

Oh the joy of "new" old bike purchase.

Its a crap shoot on how, or if, things are/have been maintained isn't it.

[..]

Friendly suggestion: suck out the crud fluid, put in fresh and then bleed the system until it flows clear, brake and clutch.  Supposed to be done every 3 years or so. Brake fluid is hygroscopic. In other words, it attracts moisture, thus the crud.
Ride safe.

I do mine every year.

[..]

Are you able to get the old ones out ?

I find a hand impact to usually work in these cases.

A little never-seize works when putting them back in.

I got the brake ones out early Fri morning to bleed the front brakes before the FCR ride.

Reservoir looked like it had melted milk chocolate inside it   

Clutch fluid looks good but I'll be changing that as well.

Hate to imagine what the rear brake fluid might be like.

Then the coolant and strip the rear wheel to to get that lubed up.

Oh the joy of "new" old bike purchase.

Its a crap shoot on how, or if, things are/have been maintained isn't it.

Sure is and even some of the best looking shiny bikes have been badly maintained.

[Bighead]

Paul I don't know the size but I took mine to a local hardware (nut and bolt place) and handed him the screw and said I need 8 of these in stainless and he charged me $1.00

[Gideon]

There's a bit of difference between Japanese Industrial Standard (JIS) Screws and the American Phillips style heads. That's why they are so often striped. 

[chris1998]

If you can't find stainless steel screws in a Home Depot, Lowes, or any hardware store, try a boating store.

[Tourus]

   I am lucky to have an Ace Hardware 1 mile from my house. They have a good selection of metric stainless steel bolt so take the one you got out with you and use their sample board and screw it in until you find the right tread size, then look through their bins to match length. Much better selection than H/D or Lowe's. also if you have a Fastenal near you they will have them.

[allanbegg]

And if you are willing to wait on the shipping, McMaster-Carr has every imaginable combination of material, length, size, and style of head.
However, you would need to know the dimensions first.

http://www.mcmaster.com/

Allan

[Gideon]

Indybobm is correct. The screws are 4mm X 12mm.
I used "Chrome" Allen Head Screws from ACE.

Also, do as Hukmut suggested.

Happy trails!

[Steve K (IA)]

the brake and clutch fluid reservoirs.

Previous owner has nearly stripped the heads.

Where do I get stainless steel?

The PO must have changed out those screws.  Mine on both Valks are Phillips head.  Like the idea of flat head socket though.