exhaust gasket washer bolt?

[guycom]

Hi I am working on a 78 xs1100 and have removed a header and am trying to fit stock down pipes...new gaskets and what i believe ar stock studs..the hex drive nuts dont appear to run down far enough to tighten the pipe to the head...am I missing washers? Thanks for you help...Guycom

[XS1100_OEM4ME]

Flange

Are you useing "stock"flanges? What kind of hex nuts, stock or aftermarket? If the down pipes are "correct" for the year and model of the bike and the rest is stock, it should tighten down. There are different depth of pipes on diferent years/models of stock pipes. Please give a discription of all parts and years / models you are using

Hi I am working on a 78 xs1100 and have removed a header and am trying to fit stock down pipes...new gaskets and what i believe ar stock studs..the hex drive nuts dont appear to run down far enough to tighten the pipe to the head...am I missing washers? Thanks for you help...Guycom

[jwhughes3]

Exhaust gaskets

There are compressible gaskets that fit down inside where the header pipe goes, if missing it will be loose.

They wont normally pop out, but if pipes were off for awhile they might be out.

They look like thin washers wrapped around some thin gasket material. Availavle at dealer.


Here is an auction example:

http://www.ebay.com/itm/YAMAHA-FJ110...#ht_1679wt_922

John

[crazy steve]

There's two lengths of head pipe flanges; the 'early' type at 1 1/16", and the 'late' type at 13/16". All the '78 bikes used the longer flange, so if fitting later pipes, the threaded studs can be too long. You can put a 1/4" spacer under the nut to make up the difference (or change the studs). There should also be a lockwasher.

Also check to make sure all the flanges are the same; I've run into sets that had short outers/long inners. From what I've seen, all the Specials used the shorter flanges, but I've seen both on standard exhausts....

[guycom]

Great info and Thanx

I have a title for the bike as 1978 but not sure if the engine is original and the header pipes were purchased with some other parts on craigslist. I'm sure the 1/4" spacer and lock nut will work . I have two studs that I have replaced and am using the hex drive nuts that were on the original header. I also just ordered a new set of gaskets they were there but beat up. Thanks Again....Guy

[GLoweVA]

Just a quick note, Are all the studs all the way in? In other words, are there a few studs that stick out a little futher than the others? That would mean that the studs aren't all the way in.
I've hears that some have doubled up on the exhaust gaskets too.

You can check you 'VIN' # on the block and it'll tell you what year your bike is.
1978 XS1100E 2H7-000101 Macho Maroon
1979 XS1100F 2H7-020101 Magenta Red, Indigo Blue
1979 XS1100SF 3H3-000101 Carmine Red, Black Gold
1980 XS1100G 3H5-000101 Diamond Silver, New Ruby Red
1980 XS1100SG 3J6-000101 Black Red, New Ruby Red
1980 XS1100LG 4H3-000101 New Yamaha Black
1981 XS1100H 4R1-000101 Indigo Blue
1981 XS1100SH 4R0-000101 Black Blue, Cardinal Red
1981 XS1100LH 4W1-000001 New Yamaha Black

[guycom]

yes the studs are even with each other definitely different year down pipes and head gaskets are on there way ill make spacers and report back...Thanks