rear swingarm nightmare

[Patrick]

Hi I hope someone can help me before I go MAD.
I am re building my bike and I'am at the stage of the swing arm, I just put everything together before the winter without it being torqued now its time to work on my bike again, I torqued the swingarm pivot bolts to 64nm but now that I have done that my swing arm is too wide 1,5/2 cm (it fitted ok before)
how is this posible and how can I sort this.

PLEASE HHHHHEEEELLLLLPPPPP.

[crazy steve]

If my conversion numbers are right, you've tightened the pivots waaay too much!

The pivot bolt is only tightened to 43-52 inch-lbs (or about 4 ft-lbs). The pivot bolt locknuts get tightened to 73 ft-lbs, while not allowing the pivot bolts to turn and change adjustment.

You need to pull the swingarm back out and check to make sure you didn't damage the bearings by overtightening them; you may have put flat spots on the rollers. If they don't don't turn smoothly and easily, they're bad...

One newton-meter is equal to .7375 ft-lbs, so you need 5.4 n-m on the pivot bolts, and 99 n-m on the locknuts. I don't know where you got that 64 number....

[Patrick]

Thanks for the reply crazy Steve.
I got a climer manual book that says 64nm / 47ft-lb for the pivot shaft bold and 100nm / 72ft-lb for the locknuts verry confused about the big differends in numbers from you and climers handbook.

[cywelchjr]

Thanks for the reply crazy Steve.
I got a climer manual book that says 64nm / 47ft-lb for the pivot shaft bold and 100nm / 72ft-lb for the locknuts verry confused about the big differends in numbers from you and climers handbook.

It's because the clymers is wrong. It's one of the misprints that has been found that disagrees with the yamaha FSM, and guys have not only damaged the bearings using those numbers, but ruined the frame by stripping out the threads in the frame, which can be impossible (or nearly impossible) to repair. Hopefully your lucky enough to have not damaged anything and will be able to set it correctly. That's why I have both the FSM and the clymers and check specs in both, and if they don't agree then I check and verify the correct spec to make SURE of the spec.

[crazy steve]

That's a typo in the Clymer manual (there's more than a few of those); it should read inch-lbs; the factory manual gives this as 43-52 inch-lbs. The 100 n-m on the locknuts will be close enough...

[Patrick]

I am glad it might only cost me a bearing, compare to stripped threads.
I thought it was a bit much for a 6mm hex key I will loosen them now thank you all for your help.

[trbig]

After you get them checked, when you install that swingarm, before you tighten the nuts, as you tighten that allen bolt, it will adjust the swingarm back and forth. Check the gaps between the pivot of the swingarm and the inside of the frame and get it as equal on both sides as possible before tightening the nuts.

[Patrick]

thanks will have to do that next weekend, just taken the tension of the frame now.
Any idea where i can get a FSM for the xs1100?

[crazy steve]

You can download one here....

http://http://www.ringler.us/family/mybike.html

Otherwise, check eBay for a used one.

[crazy steve]

Patrick, I'm sending you a PM....

[James England]

BTW.... how does drastically overtightening the pivots make the swinging arm wider?? If it was in place before tightening, then I don't see which bit is wider.... the back end?

I find Haynes manuals very good. As far as I know from using one, there are no misprints like the one mentioned. Drastic stuff.

[trbig]

I don't think it made the swingarm wider, but it got pulled to one side or the other. Most likely, whichever side got torqued that much first. BUT.... I've certainly been wrong and misunderstood people before.

[Patrick]

James I had put everything loosly in place and the rear wheel fitted nicely.Than i had to take the wheel off to torque the swingarm when it was time to put the wheel back there was a 2cm space in between the end of the swing arm and the wheel (the part where the axle goes trough) i cant figure this out myself but somehow it is wider .
I have taken the tension off the pivot points now but will have to wait untill the weekend to have a closer look.

[petejw]

James I had put everything loosly in place and the rear wheel fitted nicely.Than i had to take the wheel off to torque the swingarm when it was time to put the wheel back there was a 2cm space in between the end of the swing arm and the wheel (the part where the axle goes trough) i cant figure this out myself but somehow it is wider .
I have taken the tension off the pivot points now but will have to wait untill the weekend to have a closer look.

you havent left off the spacer have you?

[James England]

you havent left off the spacer have you?

Exactly what I just thought! I think the spacer's dropped off. There's no reason why overtightening the pivots would lead to a 2cm gap at the wheel end. I suspect he's moved the wheel about and it's dropped out somewhere......