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[trippy]

Hi all,
My 07 CVO Road king has had the Baker high performance inner primary sealed bearing kit for about 6/7 years, but in the last 2 years have been unable to stop the seal from leaking, the latest attempt with new seal etc lasted for about 250 miles then has started leaking again, Have used several different makes of seal without success, any one know of any type of device that will catch the oil or any thing that might help manage the leak, have given up trying to stop it now (Costing me a fortune, gaskets, inner primary bolts etc). Thanks.

[Twolanerider]

Likely not your problem but, just in case...

Is there any chance you're using the stock seal as your replacement?  With the Baker bearing kit you're eliminating the race so the seal with that kit has a smaller ID.

[HOGMIKE]

Hi all,
My 07 CVO Road king has had the Baker high performance inner primary sealed bearing kit for about 6/7 years, but in the last 2 years have been unable to stop the seal from leaking, the latest attempt with new seal etc lasted for about 250 miles then has started leaking again, Have used several different makes of seal without success, any one know of any type of device that will catch the oil or any thing that might help manage the leak, have given up trying to stop it now (Costing me a fortune, gaskets, inner primary bolts etc). Thanks.

If you’re using the Baker primary shaft seal did you check orientation? The ribbed side goes towards the inside of the primary, the flat side goes to the outside, facing the trans.
Is your shaft smooth and clean? No nicks, burrs or anything like that?
Check the Baker website, they have some instructions listed there I think.
I do remember my shaft not using the stock pressed on sleeve. I’ll check my install sheets when I get back home.

[trippy]

Hi guys, thanks for the comments, I am using the correct seal, have tried 4 differing makes, some a lot more exspensive than the one from  baker, without success, shaft appears smooth and polished, checked it for run out and its well within spec. Not sure where else to go wtih this, may just have to live with it.

[HOGMIKE]

Hi guys, thanks for the comments, I am using the correct seal, have tried 4 differing makes, some a lot more exspensive than the one from  baker, without success, shaft appears smooth and polished, checked it for run out and its well within spec. Not sure where else to go wtih this, may just have to live with it.

Something has changed over the last 6-7 years if it was fine before. Any work done to the bike before this issue?
Are you sure it’s the primary? Maybe the shifter shaft seal? Or main drive seal?
Only other thing I can think of is positive pressure in the primary? The primary is vented through to the transmission to atmosphere so there should be no pressure in the primary or transmission.
Curious. :nixweiss:

[trippy]

My transmission was rebuilt 6 years ago when I installed the Baker reverse gear kit, so cassette removed and rebuilt with their secondary shaft and shifter drum, all new bearings and seals, all checked for run out etc, all fine, Reverse works fine, so cannot figure out why this keeps happening.

[trippy]

Did think about pressure build up in the transmission so fitted the Fueling vented dip stick, but am sure its primary oil as I use differeant oils in all 3 holes.

[HOGMIKE]

Don’t think the fueling dipstick will have any affect on the primary. Your transmission already has a vent.
Issue sounds like just a bad seal.

I assume you run the baker sealed bearing on the inner primary with the 25-52-7 oil seal? I believe it’s a double lip. Smooth side facing the transmission.
Check the bearing.
Check again the shaft where the seal rides and it should be a tight fit and smooth.
If that’s where it’s leaking there may be a bad spot on the shaft or on the inner primary with the 25mm or 52mm hole.

 Be careful sliding the primary back on over the splines. The splines are a smaller diameter than the race area of the shaft.