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Buell Forum » Old School Buell » S2 Thunderbolt » Archive through September 30, 2011 » Updated Isolator Replacement « Previous Next »

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Buffalobolt
Posted on Monday, June 27, 2011 - 09:46 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

I'm putting the updated front isolators on the S2.

I did a search and found where Spidy did his, but I don't see where anyone stated what they torqued the bolts for the motor mount to.

What the consensus?

How much trouble did everyone else have getting those bolts out? Did you use heat, and or penetrating oil?
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Essmjay
Posted on Monday, June 27, 2011 - 11:46 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

If you are talking about the front mount that bolts to the front head, I believe those bolts into the head are 30 foot pounds. Wait for confirmation on that. The new isolator outboard bolts are 35-37 ft lb, and the new isolator bolt is 63-70 ft lb. The old bolt was 100 ft lb, so if you follow the service manual you will snap that new bolt. I did the replacement on my bike. but I didn't have to remove the front mount to do it.
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Buffalobolt
Posted on Monday, June 27, 2011 - 12:38 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Thanks, Shane!

I was wondering if you could do it without removing the mount. It looked to me like you could probably lower the jack enough to slide it in.

Is that the approach you took?
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Ebutch
Posted on Monday, June 27, 2011 - 12:50 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Mike I had to remove front-head-mount to Torque.

That is the Two side bolts,Center not so.

(Message edited by ebutch on June 27, 2011)
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Essmjay
Posted on Monday, June 27, 2011 - 01:21 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

I think I unhooked the front tie bar and that let me drop it enough.
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Phelan
Posted on Monday, June 27, 2011 - 02:49 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

I didn't have to remove anything to torque my center bolt, but I did have an 18" extension. I think I pulled my tank back to torque the side bolts but it's been 18 mo since I did it so I could be wrong.
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Buffalobolt
Posted on Monday, June 27, 2011 - 11:48 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Well, I got it on.

I ended up removing the front mount. At first I unbolted the front tie bar and lowered it down, but it lacked getting the isolator in by about a 1/4 inch. So, I did like most everyone else and unbolted that sucker. That "DO NOT REMOVE" on the front mount freaked me out a bit. I figured with my luck the boss in the head would break or something and I would miss the gathering.

It will be another week or so until I can get her all back together to put a couple of miles on before heading to Christmas. Nervous and excited!
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Buellistic
Posted on Tuesday, June 28, 2011 - 11:44 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

ISOLATOR "INFO" Class 101, just PM me if you want a copy of the information ...
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Spiderman
Posted on Tuesday, June 28, 2011 - 01:29 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Well unless you have updated info on the new isolator and how it applies to the S2 I think we can move onto 102.

the mount to the head is 70lb. This was confirmed by one of the guys working on the project for the new replacement isolator.

I talked with him during the whole process of R&D, in fact it was his S2 that was the test muell.

Here is his profile if you want to PM him...

http://www.badweatherbikers.com/cgibin/discus/boar d-profile.cgi?action=view_profile&profile=xlcrguy- users
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Buffalobolt
Posted on Tuesday, June 28, 2011 - 04:58 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Spidy,

Thanks for the info. I took my best guess and torqued them to 40lb with red loc-tite. I was unsure with that going into the aluminum head.

What's your opinion? Break them loose and re-apply the loc-tite and re-torque them? Or, leave them be?
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Gowindward
Posted on Tuesday, June 28, 2011 - 05:29 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Do it again. One point in putting a torque load on a fastener is to put a higher stress on it with the torque then it will see in cyclic loading in the application the fastener is being used in. This helps prevent fatigue failures.
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Spiderman
Posted on Tuesday, June 28, 2011 - 06:28 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

what he said...
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Buffalobolt
Posted on Wednesday, June 29, 2011 - 08:46 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Will do!

Thanks!
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