Steering head bearings - Page 3 - MVAgusta.net
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post #21 of 29 (permalink) Old 04-04-2018, 11:14 AM
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Originally Posted by esq'z me View Post
Well...I stand corrected, having never had to look at my MV's steering heads. Caged balls...nice. Must be another reason why an MV costs more than a Honda.

In 40+ years of working on Jap bikes I have never seen caged balls in the steering head. You use a heavy grease to hold the balls in place while assembling.

Thanks for educating me Noel.

Do Ducatis and other Euro bikes use caged balls, too? I know they didn't back in the 70's.
Honda has had caged bearings for a long time as well, at least since the 80's. My 81 CB900F had roller bearings, 954RR had caged balls along with all other sport models. The only time I've seen loose bearings in a steering head was on an episode of the Reassembler with James May and an old Honda monkey bike.
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post #22 of 29 (permalink) Old 04-04-2018, 01:54 PM
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Well...there you have it....only Hondas with ball bearings in the steering that I've worked on since dealership days in the 70's were vintage bikes.
The CB900F tapered rollers were in response to the prior SOHC 750's decel head shake.

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No caged balls on Suzukis....

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post #23 of 29 (permalink) Old 04-06-2018, 10:01 PM Thread Starter
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Update, managed to get tapered roller bearings locally. Thanks heaps for the assistance Mitchy. They are now fitted. Put the stem in the oven on 180 for five minutes and hit the end of it with a rubber mallet and the old ones flew across the kitchen floor. Did the same for the install and put the races in the freezer for half hour as well and they pushed in by hand.
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post #24 of 29 (permalink) Old 04-08-2018, 03:08 AM
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Good to see you are using the kitchen as a workshop Mark.Was the wife out shopping.


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post #25 of 29 (permalink) Old 04-08-2018, 04:53 AM
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The steering head bearings on my TVL are defective. Didn't make it through the MOT. Now I have 4 weeks to replace them. But unfortunately MV cannot deliver. Does anyone know where I can get these bearings elsewhere in Europe?
he OEM Part No. is : 8000B4784

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post #26 of 29 (permalink) Old 04-08-2018, 05:29 AM Thread Starter
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Good to see you are using the kitchen as a workshop Mark.Was the wife out shopping.
Haven’t got one of those anymore hence all the bikes in the house
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post #27 of 29 (permalink) Old 04-08-2018, 05:34 AM Thread Starter
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Originally Posted by Gero HH View Post
The steering head bearings on my TVL are defective. Didn't make it through the MOT. Now I have 4 weeks to replace them. But unfortunately MV cannot deliver. Does anyone know where I can get these bearings elsewhere in Europe?
he OEM Part No. is : 8000B4784
They are probably just loose, can you tighten them up or even regrease and tighten up just to get through
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post #28 of 29 (permalink) Old 04-09-2018, 11:42 AM
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Quote:
Originally Posted by Gero HH View Post
The steering head bearings on my TVL are defective. Didn't make it through the MOT. Now I have 4 weeks to replace them. But unfortunately MV cannot deliver. Does anyone know where I can get these bearings elsewhere in Europe?
he OEM Part No. is : 8000B4784
This is the same bearing as all 3 cylinder range (F3, B3, Rivale, Stradale, TV). I checked and it doesn't seem to be the same on the F4/B4 series (as per the references).

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Originally Posted by cus View Post
They are probably just loose, can you tighten them up or even regrease and tighten up just to get through
Same statement. The bearings may be just loose and tighten them may be enough to temporarily solve the issue. Otherwise, any proper mechanic guy should be able to find the proper bearings for replacement without even having the MV reference: those all ball bearings should be fairly simple to source as you just need the internal diameter, the external diameter and the height of the bearing to get a replacement bearing.


And anyone changed them on a F3, B3, Rivale or Stradale may be able to pull another valid reference than the one from MV

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post #29 of 29 (permalink) Old 05-12-2018, 10:55 PM
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Thumbs up ?

The correct number for the tapered roller bearing was already listed 32907 JR-2
But the size was incorrect, it's 35 x 55 x 14 not 15


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Last edited by theknurl; 05-21-2018 at 09:04 PM.
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