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  #1  
Old 07-02-2010, 11:06 AM
DJ48170 DJ48170 is offline
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Nylon Tube from Left Side Crankcase

Hi all. Newest member I think. I have a 1979 XS11 Midnight Special. Owned it for 3 years with no problems, until now. Just replaced the fuel lines because I leaked gas in garage.

Another problem created. What is the long thin tube going from the lower left side of the crankcase (?) up to the manifold? It looks to be nylon or neoprene like surgical tube, but it was old and brittle and just crumbled. How do I replace it and what is behind the rubber grommet on the back side of the Yamaha cover? Does the pic help? Okay, I haven't figured out how to imbed a picture.
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  #2  
Old 07-02-2010, 11:12 AM
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Montreux_Blue Montreux_Blue is offline
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Vacuum advance hose.
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1980 XS11 Special - chopped, dropped and OCTY is still installed - NOW IT'S FOR SALE! $1,800 OBO


Famous Myspace quote:

"Don't mess with TEXAS! It's not nice to pick on retards."

It's funny because I am from TEXAS!
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  #3  
Old 07-02-2010, 11:12 AM
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CatatonicBug CatatonicBug is offline
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Welcome to the forum! To clarify, there is no such thing as a '79 MNS. They were only made in '80 (XS1100LG) and '81 (XS1100LH). You may want to compare your Serial Number to this list, and put your model designation in your signature file.

That tube is a vacuum hose that controls the vacuum advance. Just get a new piece at any auto supply store. To post pictures, you have to upload them to another photo-hosting site, and link to them in your posts here. Here is a tutorial I created to walk you through the process.
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1980 XS850SG - Sold
1981 XS1100LH Midnight Special (Sold) - purchased 9/29/08
Fully Vetterized and Dynojet Kit added, Heated Grips, Truck-Lite LED headlight, Accel Coils, Irridium plugs, TKAT Fork Brace, XS850LH Final Drive & Black SS Brake lines from Chacal.
Here's my web page devoted to my bike! XS/XJ User's Manuals there, and the XJ1100 Service Manual and both XS1100 Service manuals (free download!).

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  #4  
Old 07-02-2010, 11:18 AM
DJ48170 DJ48170 is offline
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Thanks for the speedy replies. I guess it shows what a novice I am. The Craigslist ad when I bought the bike called it a MNS, and who was I to argue. The first/last bike I owned (35 years ago) was a '72 CB350. LOL! A BIG step up, eh?

So I bought some vacuum hose at auto store, but do I have to take the cover off? Is there oil behind the cover. I am concerned a piece may have broken off inside.
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  #5  
Old 07-02-2010, 11:19 AM
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1980 XS11 Special - chopped, dropped and OCTY is still installed - NOW IT'S FOR SALE! $1,800 OBO


Famous Myspace quote:

"Don't mess with TEXAS! It's not nice to pick on retards."

It's funny because I am from TEXAS!
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  #6  
Old 07-02-2010, 11:23 AM
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Montreux_Blue Montreux_Blue is offline
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No oil behind the cover.
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1980 XS11 Special - chopped, dropped and OCTY is still installed - NOW IT'S FOR SALE! $1,800 OBO


Famous Myspace quote:

"Don't mess with TEXAS! It's not nice to pick on retards."

It's funny because I am from TEXAS!
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  #7  
Old 07-02-2010, 11:32 AM
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Montreux_Blue Montreux_Blue is offline
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1980 XS11 Special - chopped, dropped and OCTY is still installed - NOW IT'S FOR SALE! $1,800 OBO


Famous Myspace quote:

"Don't mess with TEXAS! It's not nice to pick on retards."

It's funny because I am from TEXAS!
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  #8  
Old 07-02-2010, 11:37 AM
DJ48170 DJ48170 is offline
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Yep, that's the hose I am talking about. Do I just stick the new hose in the rubber grommet or is there something that attaches to the other end inside the crankcase or whatever that part is where the Yamaha is printed?

What if there is a piece of old hose laying in there? What will happen?
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  #9  
Old 07-02-2010, 11:38 AM
planedick planedick is offline
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Cover

Take off the cover, just 4 screws and everything will be very apparent. THE BEST thing you can do is get a manual and look it over real good. There's lots of things that need periodic attention and all must be done correctly or you will break something real bad.
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Drilled airbox
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late model carbs
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  #10  
Old 07-02-2010, 11:46 AM
DJ48170 DJ48170 is offline
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Okay, what am I missing? Did you mean check my VIN to the list or a serial number that I don't have access to here at work?
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  #11  
Old 07-02-2010, 11:53 AM
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CatatonicBug CatatonicBug is offline
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Quote:
Originally Posted by DJ48170 View Post
Okay, what am I missing? Did you mean check my VIN to the list or a serial number that I don't have access to here at work?
Your VIN number IS your serial number.
__________________
1980 XS850SG - Sold
1981 XS1100LH Midnight Special (Sold) - purchased 9/29/08
Fully Vetterized and Dynojet Kit added, Heated Grips, Truck-Lite LED headlight, Accel Coils, Irridium plugs, TKAT Fork Brace, XS850LH Final Drive & Black SS Brake lines from Chacal.
Here's my web page devoted to my bike! XS/XJ User's Manuals there, and the XJ1100 Service Manual and both XS1100 Service manuals (free download!).

Whether you think you can, or you think you cannot - You're right.
-H. Ford
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  #12  
Old 07-02-2010, 11:55 AM
DJ48170 DJ48170 is offline
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Sage advice, Plane. I know there are more things that I could/should do, I am just trying to get it back on the road ... for the first time this summer. I will check behind the cover, and I WILL get a manual. Unfortunately I am my father's son, and we fixed (?) a lot of things based on "word of mouth" and I was just taking easy way (foolish) out for a quick fix.
I have recently found a local mechanic that specializes in older bikes that I will likely have do more complicated work. I am okay with changing the battery (done it twice so far) or things that are rather simple and obvious. I will NOT change tires, brakes, etc.
Again, thanks for reminding me of the pitfalls of "winging it".
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  #13  
Old 07-02-2010, 11:56 AM
DJ48170 DJ48170 is offline
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Well then, my VIN does not show up on the list. In fact, it is not even close.
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  #14  
Old 07-02-2010, 11:59 AM
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Montreux_Blue Montreux_Blue is offline
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This is what it looks like behind the side cover.

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1980 XS11 Special - chopped, dropped and OCTY is still installed - NOW IT'S FOR SALE! $1,800 OBO


Famous Myspace quote:

"Don't mess with TEXAS! It's not nice to pick on retards."

It's funny because I am from TEXAS!
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  #15  
Old 07-02-2010, 12:04 PM
DJ48170 DJ48170 is offline
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OMG Blue, you are amazing with the pictures!! Thanks sooo much! I picture really is worth a thousand words.

So does the vacuum advance line just push in there or does it connect onto some port in there?
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