Inner Primary Bearing Failure

[banquo]

Originally Posted by Oilslick

The primary gasket is a crazy price so thought that it's worth the risk. Easy fix if it leaks..

I've reused mine about 10 times now (after getting advice on here.. ), and the printed seal is just beginning to go around one of the screw holes (but not leaking). It's a quality metal gasket, and certainly reusable several times. Completely crazy that they ask you to replace it every time IMHO.

[Roy]

I chatted this all through with Cheltenham HD while getting a price on the parts and they [as a previous post stated] that HD have withdrawn the need for the IPB to be replaced at every 15k service. The reason it was in the book is a safety issue, so they requested stealerships change the bearing and then send them back to HD for analysis. Apparently over a period of time, many were sent back and none found to be faulty. Hence the withdrawl.

The main load of the gearbox main shaft (which then goes through the rear belt pulley and into the clutch is taken up on the load bearing on the primary side of the gearbox. Then the IPB and the bearing on the outer cover of the gearbox are 'supporting bearings'.

Mechanic listened to my bike and heard nothing that would indicate my IPB is on its way out, so I won't be changing it.

What I will be doing, on this weekends 20k, is dragging a magnet through the old oil to ensure there are no iron filings etc.

Anyway, thanks for answering questions and advice etc

[Oilslick]

Roy, good that you don't need to fix it. I found the rotor a very effective bearing swarf collector

Dave, I've sent my old bearing to you. I looked on the internet about causes of failure. It says things like oil starvation, misalignment, brinelling, misalignment etc. I haven't got the expertise to tell so I would be interested to know what your bearing bloke thinks caused the failure.

[Roy]

Thanks Peter

Must admit to being a tad relieved as spent Saturday last week in the garage (rear tyre, 20k service and steering head bearings) and did not fancy another weekend working on the thing. Rather be riding it ;-)

Need to update my garage pictures as have quite a few addition mods to the bike (16" apes,quickbob rear mudguard, lowered shocks, kellermans). Just need to find a 'cool' set of black mirrors to go on the apes.

If there was a problem with your IPB, would it be worth getting the message to HD ? as they have not yet found one yet despite loads of 15k services resulting in 'hundreds' being sent back to them for analysis.

Cheers, Roy

[Roy]

Just got my 2006 streetbob back from having the IPB changed.

The symptons I had, for reference, were the rumbling which disapeared when you pulled the clutch in - this kicked in about 10k miles. The bike has just under 27k miles on it now, the reason I went for the IPB change is on changing the primary side had a lot of filings on the magentic piece of the sump plug.

The other thing I had been noticing is a notchy feeling, bit like when you have a worn rear sprocket or dry chain. It turned out this was one of the needle bearings in the IPB had come out.

It seems pretty clear to me, from looking at various HD websites, that there is a known issue with the IPB on late 2005/early 2006 dynas. Its a shame the factory won't admit to it; as has been said previously, the 2007 dynas have exactly the same setup and never get the same IPB issue.

I'm all sorted. My advise is if you start getting a rumbling from your primary side when your in neutral, start planning to change the IPB.

I'm hopeful now mine has been changed, that this is it now. Time will tell

Cheers, Roy

[Phil]

If you have had the bearing changed more than once, & you have a Dyna or Bagger you may have a bigger issue.

With the bearing removed lightly fasten the inner primary to the engine & trans. Check that the trans main shaft is in the centre of the hole. It is obvious at a glance.

There was a machining issue on some 06`s & 7`s that did not centre the mainshaft in the bearing causing rapid wear & multiple failures. The bearing can fail at between 5 & 10 thousand miles.

We have seen quite a few of these. The only fix is to replace the tranny case & inner primary.

We have only seen this issue on Tourers & Dynas.

[lawnmower]

What a f**king lash up. I had my 2007 TC96 Streetbob serviced at Silverstone HD after returning from The Finnish Superrally. 10k service was 384 quid. Bloody hell it would be cheaper to run an Aston Martin. compounded by the fact that the Bullshit techie tells me these IPB needs to be changed on the 2007 models as a matter of routine. We had a rather heated discussion re this. (he is the same guy that told me it doesnt rain in America when my Ultra kill switch failed. ) So im guessing that the already outrageous 384 service will next time be nearer 500 quid. Its a real shame coz i love the bike but honestly if this is progress you can keep it. Im seriously thinking of selling it and buying something less expensive to run. Any comments or experiences on 2007 bikes??

[Chris L]

Originally Posted by lawnmower

coz i love the bike but honestly if this is progress you can keep it. Im seriously thinking of selling it and buying something less expensive to run. Any comments or experiences on 2007 bikes??

How about a ten year old Evo ? all the problems ironed out...

[Battersea]

Originally Posted by Chris L

How about a ten year old Evo ? all the problems ironed out...

Or an early Twin Cam, they were made better in the beginning .......... oops forgot about the cam tensioner problem Don't yer just love-em though

[banquo]

Originally Posted by lawnmower

10k service was 384 quid. Bloody hell it would be cheaper to run an Aston Martin. ??

I know this is no consolation, but I know someone, who, in a moment of weakness, bought an Aston Martin. The service cost was over £1500, and I can tell you that the oil used cost about as much as your entire service. must have been made of gold or something.... Any they treated him like a dog turd. Having paid his money, and travelled 50 miles to collect the car, it wasn't ready as promised, and they just old him to ferk off and come back when it was.... maybe tomorrow, if you're lucky....

Oh, and if you must use a dealer, sounds like you should choose another one.... With an attitude like that, you don't want them anywhere near yer bike...