Stem bearing sizes - Honda RC51 Forum : RC51 Motorcycle Forums
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post #1 of 11 (permalink) Old 12-12-2015, 05:23 AM Thread Starter
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Stem bearing sizes

Anyone know the steering head bearing ODs for both the SP-1 and SP-1 (I've read SP-2 are same top and bottom and SP-1 are not)?

The stem diameters (IDs)?

Bearing thicknesses?

I'll also take part numbers so I can look them up if that's what you know.

2004 BMW R1150SR Project Touring Bike (in-work)
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post #2 of 11 (permalink) Old 12-17-2015, 10:09 AM Thread Starter
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No one here knows this?

2004 BMW R1150SR Project Touring Bike (in-work)
2005 Honda RC-51 SP-2 - future track tool
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post #3 of 11 (permalink) Old 12-17-2015, 10:17 AM
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SP2 uses the SP1's bottom twice......the SP1's top is a bit smaller.

If no one can answer your question, and if this is not time sensitive, I can search around my storage tomorrow and see if I can find some, I had to experiment with, back when I was fitting my Ohlins forks in 2013.....


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post #4 of 11 (permalink) Old 12-17-2015, 09:13 PM Thread Starter
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Thanks and it's not time sensitive. I need to do some bearing shopping but need to know the OD and IDs (SP-1) to do it. They're not the usual bearings, hence why I need sizes.

I'm at your mercy and thanks for helping.

Merry Christmas... *< :-)

2004 BMW R1150SR Project Touring Bike (in-work)
2005 Honda RC-51 SP-2 - future track tool
2014 Ducati HyperProject (Hyperstrada)
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post #5 of 11 (permalink) Old 12-17-2015, 10:25 PM
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This is from All Balls

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post #6 of 11 (permalink) Old 12-18-2015, 03:33 AM Thread Starter
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Great idea Waldo, thanks. This answers the mail.

2004 BMW R1150SR Project Touring Bike (in-work)
2005 Honda RC-51 SP-2 - future track tool
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post #7 of 11 (permalink) Old 12-18-2015, 09:35 AM
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The chart clearing illustrates Makis's thoughts, cool.
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post #8 of 11 (permalink) Old 12-18-2015, 09:58 AM
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Careful with AllBalls bearings. I bought a set of front wheelbearings and one of them failed within the first couple hundred miles. The seal came loose and the grease spun out, drying it up pretty fast. I replaced with OEM.

John, 2000 RC51 #000100

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post #9 of 11 (permalink) Old 12-18-2015, 04:24 PM Thread Starter
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Thanks for the heads up but I won't be using them. Have something else in mind and they don't carry it.

2004 BMW R1150SR Project Touring Bike (in-work)
2005 Honda RC-51 SP-2 - future track tool
2014 Ducati HyperProject (Hyperstrada)
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post #10 of 11 (permalink) Old 12-19-2015, 12:49 PM
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Originally Posted by BadToTheBown View Post
Thanks for the heads up but I won't be using them. Have something else in mind and they don't carry it.
Care to let us in, I'm curious.

John, 2000 RC51 #000100

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