Timken conversion
Seasoned HDF Member
Joined: Nov 2004
Posts: 8,129
Likes: 1,981
From: Ottawa, CANADA
Whatever floats your boat. I offered sincere advice, based on personal experience. You reply with a bitch comment? I won't make that mistake again.
You can take your bike, name it "Capt. *****", and shove it up your ***. That work for you?
You can take your bike, name it "Capt. *****", and shove it up your ***. That work for you?
Last edited by Clammy; Mar 27, 2023 at 10:24 PM.
Seasoned HDF Member
Joined: Dec 2005
Posts: 19,830
Likes: 7,968
From: poway
Changing to an S&S flywheel set of course makes the tapered bearing set mandatory.
One of the sponsors on this forum can do the tricky stuff for you:
https://www.hillsidecycle.com/
One of the sponsors on this forum can do the tricky stuff for you:
https://www.hillsidecycle.com/
To OP, I've heard stories of case alignment being off in some cases too. I don't think it's due to them not doing line boring but more due to them possibly loosening up the tolerances plus these motors see a lot of heat.. The cases shift.. If you're building a say a 124, I'd have the case alignment checked and case cylinder surfaces decked. You'll be boring them anyway.
You should be able to tell if the cases are matched as there is a number stamped in the bottom of each case that should match..
Last edited by Max Headflow; Mar 28, 2023 at 10:16 AM.
Road Master
Joined: Aug 2018
Posts: 1,102
Likes: 702
From: Ramseur NC
Hello all,
Before responding please, ask yourself, "does my response include a fact based answer to the specific question asked?" If the answer to that question is no, please refrain from commenting. Opinions are great things, but that's not what I'm looking for today. If you don't know how to help, start with staying out of the way.
I was planning on doing a timken conversion on my 09' FLHTCU. Another rider I was speaking to said that when Harley went to the left side roller bearing they also began having the left and right case halves manufactured separately and as a result the left side bore is often not true and needs trued to the right side before the conversion can be done.
I hadn't heard this mentioned in the YouTube videos I watched or a few articles I read. So, naturally I wanted to check with some other folks on this.
Thank you for the feedback
bikerpiper
Before responding please, ask yourself, "does my response include a fact based answer to the specific question asked?" If the answer to that question is no, please refrain from commenting. Opinions are great things, but that's not what I'm looking for today. If you don't know how to help, start with staying out of the way.
I was planning on doing a timken conversion on my 09' FLHTCU. Another rider I was speaking to said that when Harley went to the left side roller bearing they also began having the left and right case halves manufactured separately and as a result the left side bore is often not true and needs trued to the right side before the conversion can be done.
I hadn't heard this mentioned in the YouTube videos I watched or a few articles I read. So, naturally I wanted to check with some other folks on this.
Thank you for the feedback
bikerpiper
Grand HDF Member
Joined: Sep 2017
Posts: 4,359
Likes: 1,219
From: Dubuque, IA
Whoever said going to an S&S crank requires a tapered bearing needs their head examined. 
*** DELETED ***
I have an S&S crank. It was installed by someone from S&S. He refuses to do a timken conversion!
There are no known or documented cases of a lefty bearing failure! Or of any benefit of a tapered over the lefty. John at darkhorse has been quoted as saying the tapered bearing CAN affect self alignment of a crank depending on each case. It is due to the cases no longer being line bored according to Darkhorse as I recall. It is why they need both case halves.
I would like to know the end play used by those doing these conversions to assure proper alignment.
Not sure this meets the OPs standards of an expected reply.
*** DELETED ***I have an S&S crank. It was installed by someone from S&S. He refuses to do a timken conversion!
There are no known or documented cases of a lefty bearing failure! Or of any benefit of a tapered over the lefty. John at darkhorse has been quoted as saying the tapered bearing CAN affect self alignment of a crank depending on each case. It is due to the cases no longer being line bored according to Darkhorse as I recall. It is why they need both case halves.
I would like to know the end play used by those doing these conversions to assure proper alignment.
Not sure this meets the OPs standards of an expected reply.
Last edited by BuzzCap7; Mar 28, 2023 at 05:09 PM. Reason: Insulting.
Seasoned HDF Member
Joined: Aug 2011
Posts: 11,814
Likes: 5,120
From: SW Ohio
Thank you for the reply, but again: I'm looking to get a specific question answered, which you too failed to do in your response.
The question is:
In installing a timken bearing conversion, does the left side bore require trueing to bring it in proper tolerance of the right side?
The question is:
In installing a timken bearing conversion, does the left side bore require trueing to bring it in proper tolerance of the right side?
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Seasoned HDF Member
Joined: May 2008
Posts: 21,031
Likes: 12,555
From: South Carolina
I was mistaken, there was nothing malicious about my post (the S&S crankcases are the items that are all timken sprocket shaft setup).
Never claimed to be an oil expert like you (the *** DELETED ***).
Last edited by BuzzCap7; Mar 28, 2023 at 05:10 PM. Reason: Insulting.
