1981 XS1100lh rear wheel clutch hub torque specification

[MidnightSpecial]

Hi all,
can anyone help me find Torque specifications for rear wheel clutch hub. Not in Service manual can anyone advise.

[cywelchjr]

Page 7-10 of the FSM gives general torque specs based on both outside thread diameter and distance across the flats for fasteners, so based on that you should be able to determine what spec to use (I don't know what the measurements are on those bolts so I don't know what the spec is.

But as an example, if the heads are 14mm, then the torque spec would be 25 to 29 ft lbs. This chart is intended to cover all fasteners no otherwise covered in the manual.

[MaximPhil]

Page 7-10 of the FSM gives general torque specs based on both outside thread diameter and distance across the flats for fasteners, so based on that you should be able to determine what spec to use (I don't know what the measurements are on those bolts so I don't know what the spec is.

But as an example, if the heads are 14mm, then the torque spec would be 25 to 29 ft lbs. This chart is intended to cover all fasteners no otherwise covered in the manual.

My manual shows Damper Clutch and clutch hub as 39.8 ft-lb on page 7-9
is this the right part?
Phil

[cywelchjr]

My manual shows Damper Clutch and clutch hub as 39.8 ft-lb on page 7-9
is this the right part?
Phil

I think those are the clutch parts inside the engine and are pretty large nuts. IIRC the bolts he's talking about are probably more like around 14mm or so, maybe even 12mm or so. He's talking about if I'm right about the bolts that hold the drive splines into the rear wheel assembly. I don't think those are very big.

[crazy steve]

My manual shows Damper Clutch and clutch hub as 39.8 ft-lb on page 7-9
is this the right part?
Phil

Yep, that's how those parts are identified on the rear wheel diagram, and that's the number listed under 'chassis; damper clutch and clutch hub'....

[MidnightSpecial]

Thank you for the information guys i believe the 25-29 ft/lbs specification is correct. Greatly appreciated.

[cywelchjr]

Thank you for the information guys i believe the 25-29 ft/lbs specification is correct. Greatly appreciated.

Phil has it right, not having the parts diagrams in front of me when I was answering I forgot that Yamaha uses some strange terminology for parts, so the 39.8 ft/lbs is the correct number.

[MidnightSpecial]

clutch hub damper

Hi, got the updated information 39.8 ft/lbs. will do it today, i have looked through my service manual from front to back and also pages 7-9. I can not find any information about the clutch hub. I have the original Yamaha Manual. What manual are you guys refering to? Thank you for the help.

[crazy steve]

The rear wheel parts diagram is on page 5-4, where the 'clutch hub' is identified, and the torque number is on page 7-9, sixth part down. It doesn't help that they changed the name of the part slightly ('damper clutch and clutch hub'). This probably won't be in the 'supplement' part of the book that only covers changes made to specific models like your LH, but will be in the 'general' part of the book for the '78E model. Which leads to this question...

Which 'factory manual' do you have? Yamaha published these in several versions as new models came out; there was the 'basic' manual (original to the '78E models), then they offered 'supplements' that contained only the changes made to the new models that had to be used with the 'basic' manual for full info. But they also offered 'complete' manuals that covered the '78E, then included the 'other model' supplements at the back of the book. If all you have is the supplement, you're missing a lot of info....

The factory manuals can be a bit challenging to find info in sometimes, and there are errors and omissions; this same torque spec is given as 48.5 ft-lbs for the '79SF, but it's 'corrected' back to the 39.8 number for the '80-81 bikes. There's almost zero info on the various 'Special' models brake systems in the manual; the only place I've found for brake parts diagrams is the online parts fiches found here (http://www.benefiscal.co.uk/) and here (http://www.yamaha-motor.com/partview....aspx?ls=sport). Your LH also shares a number of parts with the XJ (wheels, brakes, some electrical changes, none of which is found on the other XS bikes) so you might consider getting a XJ manual which can be downloaded free here: (http://www.ringler.us/family/mybike.html) courtesy of XS11 member Catatonic Bug. You can also get a 'full' version of the factory manual covering the '78-81 bikes here if all you have is the supplement.

Hope this helps....

[MaximPhil]

Thanks Steve explained it perfectly.
Phil

[MidnightSpecial]

Hi Steve, the manual i have is from XS11 member Catatonic Bug. It contains what i thought is the full manual and the Supplement for the LH as well as others. So i'm not sure if the 78 manual that you are refering to is that manual or not, but i said before the clutch hub torque specs are not in there. Thank you all again for helping me out.

[crazy steve]

Interesting..... C'bug lists the 'OEM' manual on his site as covering '78-81 bikes, but it's only the '78 manual; it doesn't have any of the supplements for the later bikes...

I don't know which manual you downloaded; if it has a total of 279 pages, that's the Clymer manual and it doesn't have any of the torque charts contained in the factory manual, so that would explain why you can find them...

If you have the Clymer, go back and download the OEM manual too; this will be 166 pages, and the info you want will be on pages 102 and 157. There's quite a bit of 'stuff' that didn't make it into the Clymer, so it's worth having both. I'll note that while the OEM manual has some mistakes, the Clymer has those and a few more, so you sometimes need to be careful...

Or you might head to eBay; here's a factory service manual for the '78-80 bikes (http://cgi.ebay.com/1978-1979-1980-Y...rature&vxp=mtr) and here's the specific supplement for your LH (http://cgi.ebay.com/YAMAHA-XS1100LH-...rature&vxp=mtr). This might be your best choice in 'good' info...

[MidnightSpecial]

thats the one i have Steve, i just tried to download from Cbugs site and it will not work, except for the XS/XJ manual.

[MidnightSpecial]

i will hit Ebay and get the factory manual and the supplment for my bike. Thanks for the info, i thought i had the factory one from Cbug.

[CatatonicBug]

Steve is correct. The OEM (Factory) manual that I have does not include any supplements for the later years. It does apply to all years for most things, but there are a few items that changed between the models. The "aftermarket" (Clymers) manual does include the supplements though, so between the two of them, you should be able to get what you need.

If anyone has the OEM supplements in a digital format, I'd be happy add them to my library for everyone.