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#524601 - 09/27/09 10:28 PM R1200RT Alternator Belt; alternative part available?
SWB Offline
Member

Registered: 09/17/05
Posts: 1714
Loc: Oceanside, California
I didn't see an alternative part number for the alternator belt in the bmwst.com R1200RT BMWST.com parts data archive. Has anyone found a viable replacement other than the OEM belt?

Thanks,

Scott
_________________________
2005 BMW R1200RT
2001 BMW R1100RT(P) - gone
1997 Suzuki RM250 - gone
1989 Yamaha YZ250WR -gone
1980 Yamaha IT400 -dead
1983 Honda CB600 -gone
1976 Honda CB360 -gone
1970? Hodaka 100 -1st

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#524614 - 09/28/09 12:08 AM Re: R1200RT Alternator Belt; alternative part available? [Re: SWB]
Sailorlite Offline
Member

Registered: 05/15/06
Posts: 647
Loc: So. Calif.
I notice that the size specified for the '08 RT, according to the realoem.com site, is 4PK582. NAPA and other parts stores could probably match that size, with equal quality, for less than $15. Not sure I'd have the nerve to use non-OEM though. (Also, it's possible the '05 RT uses a different size).
_________________________
'14 R1200GS
Priors: '13 K1600GT, '08 R1200RT, '04 R1150RT, '05 R1200GS, '73 R75/5.

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#524627 - 09/28/09 02:32 AM Re: R1200RT Alternator Belt; alternative part available? [Re: Sailorlite]
SWB Offline
Member

Registered: 09/17/05
Posts: 1714
Loc: Oceanside, California
I forgot all about the realoem site. Will take a look. Thanks.

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#524637 - 09/28/09 06:11 AM Re: R1200RT Alternator Belt; alternative part available? [Re: SWB]
mneblett Offline
Member

Registered: 04/20/09
Posts: 368
Loc: Fairfax, VA
As I understand it, the problem is not sizing the belt, it's getting a belt with the same elastic properties -- that's why you don't see alternatives. Unlike the typical belt where you adjust the tension by moving the alternator however far you need to reach a specific tightness, BMW specs a fixed distance between the pulleys, so that the uber-special belt is stretched the desired amount. If I'm wrong, I'm sure someone will pop up soon to correct me, but if I'm right, just matching belt length won't get the job done "right" per BMW.
_________________________
Mark Neblett
Fairfax, VA

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#525221 - 09/29/09 02:35 PM Re: R1200RT Alternator Belt; alternative part available? [Re: mneblett]
Jim VonBaden Offline
Member

Registered: 03/08/04
Posts: 6022
Loc: Northern Virginia
Not that I am at all opposed to alternative parts, but the OEM is pretty cheap, and you only replace it every 24K miles. Just sayin!

Jim cool

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#525287 - 09/29/09 05:05 PM Re: R1200RT Alternator Belt; alternative part available? [Re: Jim VonBaden]
Highway41 Offline
Member

Registered: 06/12/03
Posts: 994
Loc: Jax, Fl
And put the old one under the seat for emergencies.
Bill
_________________________
2010 R1200RT
http://highway41.smugmug.com/

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#525416 - 09/29/09 09:59 PM Re: R1200RT Alternator Belt; alternative part available? [Re: Jim VonBaden]
SWB Offline
Member

Registered: 09/17/05
Posts: 1714
Loc: Oceanside, California
Originally Posted By: Jim VonBaden
Not that I am at all opposed to alternative parts, but the OEM is pretty cheap, and you only replace it every 24K miles. Just sayin!

Jim cool


Well, ya got to understand, now, that I made the 1 hour round trip to the dealer last weekend to get an air filter. If I find an aftermarket belt for less at a local autoparts store, then I didn't make a mistake and forget to get the belt. Otherwise .... dopeslap

It's kinda like that thing about why men won't stop to ask directions ... rofl

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#525491 - 09/30/09 07:40 AM Re: R1200RT Alternator Belt; alternative part available? [Re: Jim VonBaden]
Albert Offline
Member

Registered: 07/27/00
Posts: 4502
Loc: Southwestern, PA, USA
Originally Posted By: Jim VonBaden
Not that I am at all opposed to alternative parts, but the OEM is pretty cheap, and you only replace it every 24K miles. Just sayin!

Jim cool


Jim, did they change the interval? I thought I recalled my manual indicating 40k replacement schedule. No?
_________________________
Al (that's not my picture!)
06 RT

"Always do sober what you said you'd do drunk. That will teach you to keep your mouth shut."
Ernest Hemingway

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#525531 - 09/30/09 09:20 AM Re: R1200RT Alternator Belt; alternative part available? [Re: Albert]
Jim VonBaden Offline
Member

Registered: 03/08/04
Posts: 6022
Loc: Northern Virginia
Originally Posted By: Albert
Originally Posted By: Jim VonBaden
Not that I am at all opposed to alternative parts, but the OEM is pretty cheap, and you only replace it every 24K miles. Just sayin!

Jim cool


Jim, did they change the interval? I thought I recalled my manual indicating 40k replacement schedule. No?


40K as in Kilometers, yes. There was an original 36K requirement, but it moved up to 24K a long time ago IIRC!

Jim cool

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#525534 - 09/30/09 09:31 AM Re: R1200RT Alternator Belt; alternative part available? [Re: Jim VonBaden]
Albert Offline
Member

Registered: 07/27/00
Posts: 4502
Loc: Southwestern, PA, USA
Yikes! Good thing I'm carrying a spare. Thanks Jim.
_________________________
Al (that's not my picture!)
06 RT

"Always do sober what you said you'd do drunk. That will teach you to keep your mouth shut."
Ernest Hemingway

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#525556 - 09/30/09 10:00 AM Re: R1200RT Alternator Belt; alternative part available? [Re: Albert]
CoarsegoldKid Offline
Member

Registered: 10/23/06
Posts: 3067
Loc: Coarsegold, Ca, USA
And remember to carry the proper tools necessary to install the spare. When I changed mine at 35639 miles it looked as shinny as the new one and just the same size. But then again my brakes don't wear out either. I'd get the BMW part. By the way my dealer will mail whatever part I require so I don't need to drive the 2hours round trip.
_________________________
Joe
NorCal Meets SoCal in the Middle 2015 is April 24-26.

'05 R1200RT 105K miles, takes me down the highway.
'13 KTM 690 Enduro R takes me through the woods.

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#525634 - 09/30/09 12:35 PM Re: R1200RT Alternator Belt; alternative part available? [Re: Jim VonBaden]
bakerzdosen Offline

Dislocated Member
Member

Registered: 07/06/06
Posts: 4980
Loc: Provo, UT
Originally Posted By: Jim VonBaden
40K as in Kilometers, yes. There was an original 36K requirement, but it moved up to 24K a long time ago IIRC!
Good to know. Of course, it still wouldn't have helped me last week when at 24k miles and change, my 2nd alternator belt fell off after developing a hole... The first one had developed a hole around 12k and I replaced it at my 12k service.

I'm a big believer in carrying a spare now.
_________________________
'05 R1200ST
'03 F650csa (departed because of the ST)

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#525655 - 09/30/09 01:36 PM Re: R1200RT Alternator Belt; alternative part available? [Re: bakerzdosen]
pokorskij Offline
Member

Registered: 11/09/06
Posts: 463
Loc: Macomb, Michigan, USA
I just had my first alternator belt replaced +50,000 miles and it looked just about like the new one. Except for the cut the dealer mechanic put in it to remove it. Not too good as a spare now.
_________________________
pokorskij
2005 R1200RT
1974 R90/6

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#526843 - 10/04/09 11:48 AM Re: R1200RT Alternator Belt; alternative part available? [Re: bakerzdosen]
Sailorlite Offline
Member

Registered: 05/15/06
Posts: 647
Loc: So. Calif.
How does a belt develop a hole and fall off? And two of them in 24K mi.? Is there something else in there that needs to be fixed?
_________________________
'14 R1200GS
Priors: '13 K1600GT, '08 R1200RT, '04 R1150RT, '05 R1200GS, '73 R75/5.

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#526963 - 10/04/09 07:26 PM Re: R1200RT Alternator Belt; alternative part available? [Re: Sailorlite]
SWB Offline
Member

Registered: 09/17/05
Posts: 1714
Loc: Oceanside, California
Originally Posted By: Sailorlite
How does a belt develop a hole and fall off? And two of them in 24K mi.? Is there something else in there that needs to be fixed?


Good question. Maybe start a new thread (e.g. "Alternator belt troubles", etc.), and get some of the guys on the forum to focus on your specific problem.

I've never heard of an alternator belt lasting less than 24k miles, let alone two. I guess some debris could get into it and accelerate wear, or perhaps it's too tight (but I'd worry more about alternator shaft and bearings being damaged). Or perhaps there's something near the belt housing that chafing the belt.

Good luck on the solution, because if you've lost two in 24K miles, you'll probably lose another soon.

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#526998 - 10/04/09 10:37 PM Re: R1200RT Alternator Belt; alternative part available? [Re: SWB]
Dave_C Offline
Member

Registered: 01/27/08
Posts: 346
Loc: Lancaster, CA
I don't recall seeing an interval for changing the belt. I heard 30,000 miles. That's what i did, with an OEM belt BTW.
confused
_________________________
2006 R1200RT (Favorite all-around bike ever)
1995 R1100RS (sold)
1985 K100RS (sold)

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#527017 - 10/05/09 12:39 AM Re: R1200RT Alternator Belt; alternative part available? [Re: Dave_C]
IanW Offline
Member

Registered: 01/29/06
Posts: 385
Loc: Mudgee, NSW, Australia
Originally Posted By: Dave_C
I don't recall seeing an interval for changing the belt. I heard 30,000 miles. That's what i did, with an OEM belt BTW.
confused


It is now 40,000 km, had mine done with the 40k service.
Ian

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#527025 - 10/05/09 02:31 AM Re: R1200RT Alternator Belt; alternative part available? [Re: Sailorlite]
SWB Offline
Member

Registered: 09/17/05
Posts: 1714
Loc: Oceanside, California
Was reading up on replacing the R1200RT belt, and one other consideration came to mind. If the service person mounted the belt opposite it's designed direction of travel (i.e. there's an direction arrow on the belt), that would result in a failed belt within a short period of time. FYI.

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#527028 - 10/05/09 02:41 AM Re: R1200RT Alternator Belt; alternative part available? [Re: IanW]
SWB Offline
Member

Registered: 09/17/05
Posts: 1714
Loc: Oceanside, California
Originally Posted By: IanW
Originally Posted By: Dave_C
I don't recall seeing an interval for changing the belt. I heard 30,000 miles. That's what i did, with an OEM belt BTW.
confused


It is now 40,000 km, had mine done with the 40k service.
Ian


The BMW Service manual (DVD) indicates a 60,000 KM replacement cycle (equivalent to 37,282 miles, or in the U.S.A. a 36K mile replacement cycle).

FYI: I'm going to run my VIN by the local BMW dealer. The bike's had regular dealer service through 42K, and I'm not sure about the brake line purge and alternator belt. The owner briefed me verbally, thought the brake purge was at 42K (12 months ago), and I didn't ask about the alt. belt (which should have been done @36K. Now, I'm thinking that both of those were probably done @36K (and probably 2 years ago).

I've already picked up the dealer belt ($28.00). I read that one person used a 4040235 Gatorback as an alternative, but the big difference is that the BMW belt is not adjusted as with the 11xx bikes. It slips on and your done - there's no need to adjust it because there are no adjustments provided. If the belt does not have the exact "self-tensioned" properties of the OEM, it'll be a problem.

Thanks to all who responded.

- Scott

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#527040 - 10/05/09 06:09 AM Re: R1200RT Alternator Belt; alternative part available? [Re: SWB]
Anton Largiader Offline
Member

Registered: 08/30/04
Posts: 275
Loc: Virginia
Originally Posted By: SWB
The BMW Service manual (DVD) indicates a 60,000 KM replacement cycle (equivalent to 37,282 miles, or in the U.S.A. a 36K mile replacement cycle).


What DVD are you referring to? What model, what date, what program name?
_________________________
Anton Largiader, Charlottesville VA
www.largiader.com

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#527129 - 10/05/09 12:13 PM Re: R1200RT Alternator Belt; alternative part available? [Re: SWB]
marcopolo Offline
Member

Registered: 11/28/03
Posts: 3459
Loc: Alexandria, VA/Ottawa, Canada
Originally Posted By: SWB
The BMW Service manual (DVD) indicates a 60,000 KM replacement cycle (equivalent to 37,282 miles, or in the U.S.A. a 36K mile replacement cycle).
- Scott


I think you'll find that BMW has updated its maintenance schedule for the alternator belt replacement on the R1200RT to 40,000 kms (down from the earlier 60,000 kms).
_________________________
Mark
2006 R1200RT

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#527138 - 10/05/09 12:50 PM Re: R1200RT Alternator Belt; alternative part available? [Re: Highway41]
Joe Frickin' Friday Offline

Administrator
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Registered: 07/28/00
Posts: 16865
Loc: Ann Arbor, MI (USA)
Originally Posted By: Highway41
And put the old one under the seat for emergencies.
Bill


I've always kept a new one under the seat for roadside replacements. That way, if you do use it, you don't have to swap it out ASAP for a new one; you just leave it installed, and buy another new one to put under the seat.
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Mitch
"VENI VIDI VEHI"
I've got Mojolevers for sale!
PLEASE GIVE BLOOD

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#527161 - 10/05/09 01:32 PM Re: R1200RT Alternator Belt; alternative part available? [Re: Joe Frickin' Friday]
tallman Online
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Registered: 12/21/02
Posts: 17552
Loc: Tallahassee, Florida
Logical.

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If my mind wanders, should I follow it?
Tim
Conch Town Krewe
2003 K 1200 GT Mearas Luhn



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