Seat only stays on the latch,

[tunnelrider]

Hi all,

Is there supposed to be a circlip on one of the seat hinge pins on the subframe?  I think I've seen one on a R100 before.  Since my seat falls of these pins at the first available breath of wind it seems to me the pins are too short.  Mine are 10mm long, front and back, if that's normal I'll look at the seat hinges. As always, any answer is much appreciated.
Cheers

[Barry]

Yes the seat pins would originally have had a special type of E clip that looks a bit like  like a standard flat E clip but with the out edge turned over.  A standard E clip would work OK.  

Motobins have the proper item for 35 P

[tunnelrider]

Great, thanks Barry.  Where does that go, on the back pin?  Are 10mm long pins all we get on these beasts? By that I mean the subframe pin, not the circlip, as I suspect I've got a bike with a possibly broken off pin so I can't fit a circlip, as per a bigger airhead. If that's not the case I need to panel beat the underneath of the seat!

Cheers

[Barry]

I'm not at home to look at mine but recall it was the back hinge pin if not both. There should be a groove in the pins to locate the clips,

[Barry]

I'm not at home to look at mine but recall it was the back hinge pin if not both. There should be a groove in the pins to locate the clips,

[Bob_Roller]

They are on both hinge pins .

Using  45 or 90 degree needle nose pliers they go on without any problems .

[montmil]

They are on both hinge pins .

Using  45 or 90 degree needle nose pliers they go on without any problems .

And mine seem to come off without any problems.

Had a similar issue on my 1981 R65. Ordered the funny little clips and installed them in the recessed groove on the pins. That lasted less than one ride. Came off. Jumped off. Vanished. I've just accepted the issue and remember which way to move the seat that doesn't cause it to come unplugged.

Same issue with the R100S except it is far easier to have the seat slip off pins. Usually have to find a helping hand to get it back on correctly. Real PITA.

[Bob_Roller]

A washer and .040 in, 1 mm diameter safety wire will work as well .

[montmil]

A washer and .040 in, 1 mm diameter safety wire will work as well .

Great idea, Bob!
Got washers. Got safety wire and the twisty pliers. Going to give this a shot on the R100S.

[tunnelrider]

Came off. Jumped off. Vanished. I've just accepted the issue and remember which way to move the seat that doesn't cause it to come unplugged.

Ha ha you crack me up Monte, that's some of the best I've heard IMHO, in my short time of being a member of the asylum!

Might try the wire as well. Is safety wire some kind of toughened wire?

[Matt Chapter]

Is safety wire some kind of toughened wire?

Generally, it's a term of art in racing circles.  The wire which you use to keep the track safe for others, i.e. keeping all your bits tied to your bike such as drain plugs, circlips, washers, etc.  Not sure if there's an actual product or specification for the wire itself.

[montmil]

A washer and .040 in, 1 mm diameter safety wire will work as well .

Great idea, Bob!
Got washers. Got safety wire and the twisty pliers. Going to give this a shot on the R100S.

Done deal. I had the bright idea to drill a hole through the seat pin, add a washer, then fit a cotter pin.

Half way through the drilling, the bit broke off in the hole.  Safety wire, Bob Roller, safety wire. Now need to dress and touch up paint where I cut away a bit of metal to access the seat pin. [smiley=beer.gif]

[montmil]

Is safety wire some kind of toughened wire?

Generally, it's a term of art in racing circles.  The wire which you use to keep the track safe for others, i.e. keeping all your bits tied to your bike such as drain plugs, circlips, washers, etc.  Not sure if there's an actual product or specification for the wire itself.

Safety wire is a semi-soft stainless wire available, usually, in .032 and .040 sizes. Bike shops and aviation suppliers have the wire and the cool safety wire pliers. A fun tool to have as it makes beautiful twists that, when done correctly, will pass an FAA inspection on your aircraft. I know this. Also, most motorcycle racing organizations require all kind of nuts, screws, bolts, drain plugs, etc & etc to be safety wired before you can pass tech.

[Bob_Roller]

You can get safety wire pliers at Harbor Freight .

http://www.harborfreight.com/6-inch-safety-wire-twisting-pliers-45340.html


http://www.harborfreight.com/9-inch-safety-wire-twisting-pliers-45341.html

If you ever feel the need to have a set !!!!

Duckbill pliers will also work as well as the specialty pliers .

Here's a few images of safety wire use .

https://www.bing.com/images/search?q=safety+wire&qpvt=safety+wire&qpvt=safety+wire&qpvt=safety+wire&FORM=IGRE