Exhaust Gaskets for S2R800

[psycledelic]

Anyone know if the exhaust gaskets for an S2R800 are a common size or am I gonna have to make an hour drive to the shop? 

[dlearl476]

Do you need them NOW?  If not the internet is your friend.  (I buy 99%  of my parts online from ProItalia.  My local dealer never has anything I need in stock.  And fwiw, when I buy stuff like this, I always buy twice as many as I need so I have them already the next time I need them.)

If you do need them today, you could pull one out and see if a local motocycle shop has one.  (Sorry I have no idea if they are a "common" size or not.)  I also think NAPA may have a size that would work.

[psycledelic]

Yea, it's now or no bike.  I have one out and it looks like a run of the mill doughnut style gasket, but those Italians are sneaky.  I am gonna go shop around the local auto / moto shops.  I was just being lazy and hoping I would get lucky and someone online would know. 

Good point, I will definately put a couple extra in the toolbox.

[dlearl476]

FWIW, the ones I bought to put in when I re-install my RR exhaust are 47mm X 39mm X 2.2mm and they are Part 037084005.  You might want to call a dealership and see if that's the same PN for your S2R (I have a '99 M900).  You might want to get a new set of exhaust nuts as well.  NAPA or any foreign car shop will have those.  They are M8 X 1.25 copper locking nuts.

[psycledelic]

I actually pulled the nuts/threads and touched them up at work last night (cleaned, tapped, and filed the threads).  I will probably add new ones when I install my new exhaust.  Currently in between exhaust systems and am just installing the stock headers and udder until the new stuff arrives.

[dlearl476]

Exhaust nuts are supposed to be locking i.e. one use.  But like everyone else, I use them over an over (until I wised up and simply bought a box of them from WURTH. Luckily, two of my cars take the same ones)  And fwiw, if you're between exhaust systems, you can re-use the gaskets as well.  I have old ones in mine and, like I said, I'm waiting until my RR exhaust gets back from the ceramic coater to install all the new stuff.

One little tip:  IIRC  typical M8X1.25 lock nuts have 13 mm flats (I think) Porsche uses a special copper lock nut that has 12 mm sides and that extra MM helps a TON on the vertical cylinder.  If you have to buy some, try an indy Porsche shop.

Oh, and by "lock nuts" I mean the ones with the top two or three threads crimped.  Obviously NyLocks wouldn't do well in an exhaust application.

[psycledelic]

Talk about being ass backwards.  I am ditching gaskets and refurbishing the nuts.  I will definitely get new nuts and studs with the new pipes.  Thx for the heads up and all of the info. 

[He Man]

I ran muy bike for thousands of miles without them and the bike ran fine. it wasnt until i spray painted my udder that i realized i needed one.

[psycledelic]

I ran muy bike for thousands of miles without them and the bike ran fine. it wasnt until i spray painted my udder that i realized i needed one.

Didn't smoke around the engine outlet?  I set mine up without one and is smoked pretty bad.  That was before I pulled the nuts and studs and cleaned them.  I am gonna try again.  No one around here has a gasket that is even close and the shop is gonna order me 4.

[dlearl476]

Personally, I wouldn't run it without gaskets.  IMO, you're better off with old ones than no ones.  YMMV.

[He Man]

nope, didnt smoke. The dealer that did my valve guides left it out and i rode like that for thousands. And i even dynoed it without the gasket. 85hp, 64tq or something like that.

[ducatiz]

i cut some cork gaskets and coated them with copper exhaust RTV silicone.

better seal and cheaper.

you have to let the RTV silicone completely dry, which means >24 hours to be safe. 

gasket material comes in rolls at any auto parts store

the metal ones are crush fit.  they are fine, but a bead of silicone will seal far far better.

i put a bead on each side of the gasket, let it sit up for about an hour to firm a little bit then torque it all down.  the silicon will squeeze out a bit, but leave it and cut it away (DO NOT PULL) after it all sets and dries.