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Registered
Join Date: Dec 2001
Location: Pittsburgh, PA
Posts: 590
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Torque help
Really, is the torque on the front wheel axle bolt really ONLY 30 NM? That seems kinda low considering... I know its in the manual, but could this be a typo?
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Kam '01 R1100S going bye bye for an 06 1200GS, '02 aprilia RSV mille R, '03 tuono R, Kelly's bar&lounge how about never, does never work for you??? |
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07-21-2005, 04:12 PM
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Barback King
Join Date: Apr 2001
Location: Now it's Nevada
Posts: 12,033
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Probably not a typo...really the sum of all the torques is what creates the stability standards...er sumpin'...
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R11S CNC BARBACKS |
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07-21-2005, 04:16 PM
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Moderator
Join Date: Aug 1999
Location: Austin, TX. USA
Posts: 11,605
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The real work is done by the pinch bolts
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99 R11S w/ BBP, InDuct, Öhlins, PVMs, Braking, SJ-Filter, ZTech, HIDs D675 R90Cafe R60/2 M900 SV650-SS CBR150R XR125 & CRF175 Motards OnRoad OffRoad Cycles, Austin, TX: BMW, Ital, Suspension, Electrics Dealer for K-Tech, JRI, GP Suspension, Penske, Öhlins, RaceTech, Elka, Wilbers, IKON & Works www.ororcycle.com CMRA EXPERT #841 Various Formula 5, 6 & 7 championships 2006-2012 A3, Navigator, |
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07-21-2005, 04:55 PM
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Registered
Join Date: Dec 2001
Location: Pittsburgh, PA
Posts: 590
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I guess, but the torques on the aprilias front axles are much higher, and there are pinch bolts there too.
If the gurus say so...
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Kam '01 R1100S going bye bye for an 06 1200GS, '02 aprilia RSV mille R, '03 tuono R, Kelly's bar&lounge how about never, does never work for you??? |
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07-22-2005, 05:01 AM
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Registered
Join Date: Sep 2004
Location: Bryn Mawr, PA
Posts: 1,214
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It is probably correct. Putting on new tires the other week, I just "tightened" the axle bolt and the pinch bolts - I don't have a torque wrench that registers that low.
Some hints: if you're taking off the front wheel, use a thin rag between the calipers and the wheel rim. You have to angle the caliper out and it is easy to scratch the rim since the clearance there is tight. Yes, you'll have to jack the front end up to get the front wheel off. I used a floor jack and a piece of wood under the front of the engine (oil pan). Also, the booklet suggests that when putting everything back, you go through a cycle of bouncing the front before you tighten the axle bolt and the pinch bolts. My guess is that the modern BMW Telelever is not as sensitive to fork binding as the old BMWs were. Back in the day, you really had to perform a whole ritual to eliminate binding when tightening up the front axle and pinch bolts. Anyway, I may have over done it, but at each step (axle bolt and then initial pinch bolt tightening and then final pinch bolt "umph") I made sure I bounced the front end of the bike.
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Trex |
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07-22-2005, 05:17 AM
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Moderator
Join Date: Aug 1999
Location: Austin, TX. USA
Posts: 11,605
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Yeah, it's on the low side, but I've never seen a problem there.
It's real purpose is to keep the axle from sliding out easily if the pinch bolts should loosen. Thus, the bolt really only need be tight enough to hold itself in. Also worth noting (just to give you a nice warm fuzzy and all) is that the axle sees scarcely any axial load. When it does (leaned/turned) then the difference in force exerted by the two legs puts the axle in a real bind, which actually lessens the chance of it slipping. It's counterintuitive to all of us raised with giant torqued car lug nuts, but plenty safe. Rest easy and enjoy the weekend
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99 R11S w/ BBP, InDuct, Öhlins, PVMs, Braking, SJ-Filter, ZTech, HIDs D675 R90Cafe R60/2 M900 SV650-SS CBR150R XR125 & CRF175 Motards OnRoad OffRoad Cycles, Austin, TX: BMW, Ital, Suspension, Electrics Dealer for K-Tech, JRI, GP Suspension, Penske, Öhlins, RaceTech, Elka, Wilbers, IKON & Works www.ororcycle.com CMRA EXPERT #841 Various Formula 5, 6 & 7 championships 2006-2012 A3, Navigator, |
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07-22-2005, 10:59 AM
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