Centerstand bolt size

[CatatonicBug]

Anyone know what the specs are on the shoulder bolts that hold the centerstand on? Has anyone found a replacement at a hardware store rather than a bike shop?



The Yamaha number is 90109-10440-00. It looks to me that the shoulder should be 43mm long, and 14mm in diameter. I'm not sure though, and no one seems to advertise that they carry metric shoulder bolts.

Mikesxs sells one that's ported with a zert fitting on the head, to allow for greasing the pivot point.



That's cool and all, but I'd be happy with a regular shoulder bolt, preferably from a local store.

[latexeses]

Nothing I can think of that wouldn't take more work than buying one. I would have said sleeve a screw with that thread size but the head would be smaller. Unless you use a flat washer up by the head of the screw before you put the sleeve on.
I'll keep thinking.

[fredintoon]

Hi 'Bug,
if you want a hardware store fix do what latexeses sez.
3/8" bolt, penny washer and a sleeve will botch you up one.
It's what I'd have done when I lived out in the country, a long way from a bike shop and before I had a computer.
Today, I'd pony up for those shoulder bolts from MikesXS.

[crazy steve]

Most any industrial bolt supplier should have these; they always have had whatever I've needed...

'78E original owner

[COOL TOM]

Bolt

HI Bug,
when you come up in May for the ralley i will give you one off my parts bike.

[CatatonicBug]

Unless you use a flat washer up by the head of the screw before you put the sleeve on.

You can't put a washer under the head of the bolt, because there is a "stopper" on the clevis that holds the head of the bolt and keeps it from turning all by itself.

Most any industrial bolt supplier should have these; they always have had whatever I've needed...

That's what I was thinking. I just don't know what size to ask for when I go into the store. I mean, it's just a shoulder bolt, but there are lots of different sizes. I just want to know what size it is, so I can ask for the right one.

HI Bug,
when you come up in May for the ralley i will give you one off my parts bike.

I appreciate it Tom. However, I am expecting my centerstand in the mail today (at least I hope so), and my Sidecovers on Thursday (according to Fedex), and there is a bike show in 2 weekends that I'd like to enter my bike into. For the first time since I've owned the bike, it will actually have all of it's parts, and the oil leak has been stopped!!

I just hoped that I could go to a local hardware store and ask for a couple of shoulder bolts with "X" specs, and purchase it for less than the $8-10 each they want for them at the stealer.

[fredintoon]

You can't put a washer under the head of the bolt, because there is a "stopper" on the clevis that holds the head of the bolt and keeps it from turning all by itself. - - -

Hi 'Bug,
you sure about that stopper? There ain't one on any of the various XS650s, XS750s & XS1100s I have worked on.
Admittedly, your bike may well have them.
The way mine all work is that each stand frame mount has a 10mm hole on one side and a 14mm hole on the other.
The shoulder bolt is held by the 10mm hole being clamped between the end of the shoulder on one side and the nut & washer on the other.
The head end does not quite clamp down on the 14mm side of the mount.
So the old bolt+washer+sleeve trick should work just fine.
If your bike does have a stopper, grind the washer D-shaped to fit it and bend it's other side up to make a tab washer.

[CatatonicBug]

Yep. It's got a stopper on it. On both clevises. Maybe it's a MNS-specific thing?

One other thing that confuses me is that the nut that goes on that bolt is listed in all the parts lists as a "Nut, U". If I look up what a "U Nut" is, they are all just speed nuts for automotive interior panels and such. Definitely not something I would use in this application. I assume "Nut, U" was what they might have called a nylock nut in decades past?

I have determined that this bolt is the same one used on the XS750's and on the XJ1100. There is a local junkyard with an XJ (I already scavenged the rear Master Cylinder from it) that I might be able to get the bolts from.

It still seems strange that this is not more of a standard bolt that I could just go to a hardware store and ask for...

[crazy steve]

I just want to know what size it is, so I can ask for the right one.

I measured one off the parts bike ('78E) and the shoulder is 14mm x 40mm. I wouldn't think they'd change this year to year, but they made plenty of other weird little changes so YMMV...

If you have trouble finding this in a metric, a 9/16" shoulder is pretty close; .558" vs .55" (14mm). Only .008" difference; may be a little tight, but if the hole has wear it may snug it up again. Measured shoulder length in inches is 1.580, so a 1 5/8" could be substituted (1.625"). So this may give you a few more choices...

'78E original owner

[CatatonicBug]

Thanks Steve. The part number is the same for all the XS11's and the XJ11, so that info should help a lot.

[bikerphil]

CB, if you can't find those bolts, I have 2 extra you can have.

[crazy steve]

Just out of curiosity, does anybody know if Yamaha ever offered a 'hard copy' of the parts book to owners? I know you can find the microfiche on line, but that can be a PITA to use sometimes and as 'bug found out, isn't always that helpful.

That's one of the things on my Sporties I really like; HD also sells the parts books as well as the manuals, and if you know how to decode the part # you can tell a lot about what interchanges. And while they have part #s on hardware, in the back they give you a 'hardware' list, crossing the part to a description of what it is as a 'generic' bit.

'78E original owner

[CatatonicBug]

Thanks BP. I checked the Fastenal website (they have several stores around here), and they don't even carry anything like what I needed. I went looking on my lunch break today, and the local salvage yard wanted $30 for those 2 bolts! And they would have to pull them from a bike (they don't let you pull parts yorself there). I went to the local bike shop, and they wanted $9.11 each. The cheapest I found them online was $7.50 or so, plus shipping, so I decided to get them. At least I know they're the right ones.

In case anyone was wondering, they are M10X1.25 thread.

[DGXSER]

Print out the online pricing and take it to the junkyad, I bet they drop their price to lass than the online price.

Onece went o my local (and only one in town) MC Junkyard for a wiring harness for my old XS750. He wanted $110 for it until I told him I could get a new one for $60, then his was $30.

[crazy steve]

After doing a search, it seems those are one of the 'oddball' sizes; bummer. You can get a 12mm or 16mm shoulder, but not 14. No 9/16" out there either.

Ran into the same problem trying to get 7/16-14 button-head allens once. Nobody had them, finally found one supplier who did but he wanted $20 EACH! Said the h**l with that, drilled/tapped so I could use 1/2" hardware, the cost went down to $3....

'78E original owner