850 gas tank question

[highpointbuc]

was working on my bike, ( just got it home a few days ago)
have the seat off and noticed that a bolt is missing right where the seat
and tank meet. kept looking around and found that the entire tank can come off the frame. only thing that was holding it on is the petcock / reserve fuel line. ( is that the correct wording? )
want to take the tank off anyway, but did not realize it was that easy.
or should it be? lol !!!!!!!!!!!!!!!!!!!
any ideas on what is missing? ie. bolt size, etc.

thanks

mike

[Roemy24]

Mike, I have a 1980 850 that has one bolt that holds it on. The guy before me crossthreaded the threads in the frame. I ended cleaning the threads up but didn't get a bolt that fit real snug, so I ended up putting a Nylon locking nut on the back side. There is plenty of room to get to it.

[highpointbuc]

great idea

will try that, the mounting tab on the tank is huge, but the hole in the bike frame is pretty small, maybe 10mm or so. will try that, just thought that there would be more holding down that tank.

[asetech]

I don't remember the thread size but you should have a bolt, large washer, and grommet. looks like 10-14. http://www.bikebandit.com/assets/sch...SU0109_038.gif[IMG]file:///C:/Users/Chris/AppData/Local/Temp/moz-screenshot-1.jpg[/IMG][IMG]file:///C:/Users/Chris/AppData/Local/Temp/moz-screenshot.jpg[/IMG]

[SqDancerLynn1]

Don't mount it solid it needs the rubber spacers/washers
One hose is fuel the other smaller one is the vacuum hose for the petcock

[psyguy]

the bolt size is M8x1.0

as noted, the original setup comes with a spacer and a rubber groomet so although you tighten the bolt fully, the tank is actually suspended on that rubber groomet

[Roemy24]

highpointbuc, yes...don't mount it solid. I did my technique using the original washer and rubber spacer with a new Steelless Steel bolt and SS Nylon Nut.

[Steve]

I recently got all new mounting hardware for my son's '81 850 from Bike Bandit.
You will need parts 10 through 14.
Cost is $6.30 plus shipping.

[highpointbuc]

thank you very much!!

i appreciate what i have been provided very much
will work on hitting the big box stores and seeing what i can fab up.

[bwringer]

the bolt size is M8x1.0

You sure? M8 bolts are almost always 1.25mm pitch...

[psyguy]

You sure? M8 bolts are almost always 1.25mm pitch...

uhm, i think you might be right, brian