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27th September 2011
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Biker
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Join Date: Oct 2008
Posts: 2 Sportster/Buell Model: 883 Custom Sportster/Buell Year: 2001
Reputation: 10
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Drum Brake Hub Interior Scoring or Machining?
Hi guys! I have been reading your forums ever since I purchased my '71 basketcase. Can not say how helpful your posts have been especially the Electrical Checklist Sticky?
I am having new rims and spokes put on what might be the original drum hubs and as part of the process I thought new wheel bearings might be in order.
I got the old crunchy bearings out and found that on the interior of the hub there what look to be perhaps some machined grooves. I did not see these as a detail in the FSM so thought some pictures might help. Are these grooves normal? Is my hub damaged? I first thought is that one might fill this area with grease and the grooves would direct the grease to the bearings.
I would be glad to take any additional pictures if it would help.
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27th September 2011
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Biker
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Join Date: Oct 2008
Posts: 2 Sportster/Buell Model: 883 Custom Sportster/Buell Year: 2001
Reputation: 10
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27th September 2011
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XL FORUM TEAM MEMBER
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Join Date: May 2007
Posts: 5,109 Sportster/Buell Model: Ironhead XLH Sportster Sportster/Buell Year: 1978 Sportster/Buell Model #2: Ironhead XLT Sportster Sportster/Buell Year #2: 1977 Other Motorcycle Model: Honda CBX 1000 Other Motorcycle Year: 1979
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Don't think those grooves will affect anything since the bearings and seals fit on the smooth areas near the outside.
Eric
__________________
1978 Anniversary Edition XLH. Wiseco 10:1 forged pistons, Andrews R5 cams, dual plugged heads with Super Port Flow, single fire ignition, Mikuni Solex 36 PHH carb, Jagg oil cooler, '73 gauges, kickstart, Barnett kevlar clutch, Progressive front springs, Hagon Nitro shocks, all-Andrews tranny. 1977 XLT, Mikuni Solex 36 PHH carb, tapered dual exhausts, Andrews Y cams, Progressive front springs, Hagon Nitro shocks.
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27th September 2011
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Biker
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Join Date: Apr 2011
Posts: 80 Sportster/Buell Model: XLCH Sportster/Buell Year: 1975
Reputation: 10
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I would guess the bore that these groves in is just clearance. I bet the fellas from the factory bored the hub, and then they rapid travel back with the tool presure still on the boring bar
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