Gasket material type??

[chuck hahn]

Ive been looking at different sites and I see so many types of materials for making gaskets. So the first thing I think I should know is what the material the engine cover gaskets and cam covers are made of? I dont want to get into any neoprene or anything like that...just the basic stock style materials.

[Buffalo Bill]

It might be the thickness that counts…

I'm sure you can use any material that you've seen used for any valve cover on any vehicle.
However, on some it's the thickness that counts, as on a GS550 that has the tachometer gear mounted in the valve cover. You have to use the right thickness gasket, so the gear meshes proper with the gear on the cam.
Bill

[chuck hahn]

I have some OEM side cover gaskets for the 73 TX750 from off Ebay..but they are no longer available from the dealers. The theory is to use them as templates to make my own side cover gaskets for the bike. They dont need to be all that thick, just needs to be the proper material type for the cover applications.

[chuck hahn]

Case covers on this bike will require a piece about 14 X 20 for the clutch side and about 14 X 14 for the stator/points cover side. Got some big azz side covers on this bike!!!!

[1_v8_merc]

The autozone stuff is probably better than most aftermarket/ebay junk.
I used the basic black material from Autozone, on my side cases.
Couple thousand miles, and nothing. Even pulled it off to check my clutch springs, gasket was perfectly fine.

[chuck hahn]

Got it as far as where..but the original question hasnt been answered. What type of material do I need? whats the technical name of the paper gasketing material like our suzy gaskets are made of?

[Nessism]

Chuck,

Fel-Pro makes some gasket paper they call "rubber fiber" (or something similar). I think that stuff will work well as long as you get the right thickness. I've cut a bunch of gaskets with that stuff and it worked out fine.

[chuck hahn]

Thanks ED...thats the stuff I need to hear. Anyone else have a favorite??? I would think that .030 thick would be sufficient...yes????

[koolaid_kid]

I think that is going to be your biggest concern, Chuck, the thickness. Do you have any other gasket that you can compare with? I know that AutoZone sells 2 different thicknesses, not sure what that particular bike would have used. I take it this is for the Yamaha 750 you are restoring?

[chuck hahn]

Yes...the 73 TX 750. I got an OEM left side cover gasket already and a right side OEM one on the way. I want to use the OEM ones as templates to trace and make my own...keep the OEM as masters to copy of of. Its not everyday one can find an OEM and they are NLA from the dealer.

[koolaid_kid]

O.K., then I would measure them when you get them and get that thickness. I agree, keep the OEM ones hanging on the wall and use the ones you make, might take an attempt or two to get it right and keeping a template around would be a good thing. As you said, getting parts for that bike will be an issue because of its rarity.

[chuck hahn]

Well its now 100% complete. I got a NEW master cylinder, a set of reproduction front brake lines, and the GS mirrors were the same except that the stems were about 1 inch longer so the set of GS mirrors went on. theres a guy on Ebat that wnts nearly 200.00 for a complete tool kit in the origin al canvas bag with rope tie wraps. Just cant come to grip with the price. Wish i knew the tool kit part number to do some cross referencing.

[JEEPRUSTY]

Case covers on this bike will require a piece about 14 X 20 for the clutch side and about 14 X 14 for the stator/points cover side. Got some big azz side covers on this bike!!!!

Yamabond!........

[chuck hahn]

jeepster...I did actually consider Yamabonding or three bonding the gaskets to the cover and then a little grease on the engine case so they would remove real easy and maybe be reuseable...if necessary.