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29th October 2009
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Biker
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Join Date: Sep 2009
Posts: 44 Sportster/Buell Model: XLH Sportster/Buell Year: 1977 Other Motorcycle Model: Moto Guzzi 850-T
Reputation: 32

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Tighten head bearings on a '77
Hello all,
I looked in my factory manual and couldn't find where it described snugging up the head bearings. I'm getting a clunk feel that tells me they're loose. Going by the following pic:
Do I just loosen pinch bolt #2 and the lower fork pinch bolts and then snug up #22 ("sleeve end, fork stem")? Do I remove #22 and then tighten #21 ("sleeve, fork stem")? Something else?
I'd didn't want to go messing things up so I thought I'd check with the gurus here before I mangled some threads
Also, in this parts manual page it looks like #22 is below the upper triple-tree, but on mine it is on top. Is this right? Maybe the PO used an extra one as a replacement for 41/42 and I can't see the real one until I remove it?
thanks for the help
-Steve
Last edited by tocino; 29th October 2009 at 18:34..
Reason: Title mispelled
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29th October 2009
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Senior Master Custom Bike Builder
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Join Date: Jun 2008
Location: Cornelius, OR
Posts: 3,988
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If it is clunking I would disassemble it and check for damage, good chance the bearings or races are wrecked. I'll bet that if you tighten #21 the steering will feel notchy and bind up at certain spots.
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Ryder Rick "If life doesn't kill me, nothing ever will."
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29th October 2009
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Rider Of The Iron Steed
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Join Date: Dec 2003
Location: London, ON Canada
Posts: 23,716 Sportster/Buell Model: XLH Sportster/Buell Year: 1978
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I have had this clunk on my IronHead, and a Yamaha Virago some years ago. I just did as you have outlined and it was fine after that in both cases. Just have to have any pinch bolts loosened then snug it up; then retighten the pinch bolts, eh.
The bars, when straight ahead with the bike not doing anything, should tip from center to either side with a nudge.
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29th October 2009
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Senior Master Custom Bike Builder
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Join Date: Jan 2007
Location: Heart of Dixie
Posts: 5,955 Sportster/Buell Model: XLX-61 Sportster/Buell Year: 1983 Other Motorcycle Model: Honda CL350 Other Motorcycle Year: 1969
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Very small amounts of tightening make a big difference. It's really easy to overtighten if you're not careful.
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I never wanted a Harley, but I always wanted a Sportster.
If it ain't broke, don't fix it (especially if you don't know what you're doing). Most Sportster problems are owner-induced.
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29th October 2009
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Biker
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Join Date: Sep 2009
Posts: 44 Sportster/Buell Model: XLH Sportster/Buell Year: 1977 Other Motorcycle Model: Moto Guzzi 850-T
Reputation: 32

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So it's tighten #21 to snug the bearings? What is nut #22 for?
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29th October 2009
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Senior Chief Master Mechanic 1st Class
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Join Date: Apr 2007
Location: North East US
Posts: 1,266 Sportster/Buell Model: xlx Sportster/Buell Year: 1985 Sportster/Buell Model #2: XLCH Sportster/Buell Year #2: 1979 Other Motorcycle Model: Sprint ss Other Motorcycle Year: 1967
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That's the part catalog. I hope you have a FSM. HD # 99484-78
In the FSM it's on 2-26 removing fork stem ect. You'll most likely want to check the bearings.
then 2-30 tell's how to Install.
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29th October 2009
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Biker
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Join Date: Sep 2009
Posts: 44 Sportster/Buell Model: XLH Sportster/Buell Year: 1977 Other Motorcycle Model: Moto Guzzi 850-T
Reputation: 32

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Quote:
Originally Posted by runingmouse
That's the part catalog. I hope you have a FSM. HD # 99484-78
In the FSM it's on 2-26 removing fork stem ect. You'll most likely want to check the bearings.
then 2-30 tell's how to Install.
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Thanks - I'll look again. (I have both parts cat and a manual (maybe just the 77?), I put up the image from the parts catalog for the ease of explanation)
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29th October 2009
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Master Mechanic
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Join Date: Nov 2004
Posts: 261
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just be real careful and dont tighten them at all beyond just getting the play out. too tight headset bearings will cause a highspeed wobble, or tankslapper, and trust me, you dont want to experience that on the freeway with a bunch of cages on your ass.
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30th October 2009
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Biker
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Join Date: Sep 2009
Posts: 44 Sportster/Buell Model: XLH Sportster/Buell Year: 1977 Other Motorcycle Model: Moto Guzzi 850-T
Reputation: 32

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Quote:
Originally Posted by runingmouse
In the FSM it's on 2-26 removing fork stem ect. You'll most likely want to check the bearings.
then 2-30 tell's how to Install.
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Thanks - exactly where you said it was.  Guess I got impatient / lazy and didn't read through the chapter.
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