TC88 Rebuild
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4th Gear
Joined: Nov 2017
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From: Ca
TC88 Rebuild
i have a 04 Low Rider that is currently going through a complete rebuild including bottom end due to excessive wear and runout on the pinion shaft. At this point my plan is to buy a stock stroke crank and turn it into a 95 once I get to the top end. Question is, do I have to do the timken upgrade for the crank or can I replace the crank bearings with the stock type and be ok? This is the first time I'm rebuilding so newbie at it, but am mechanically inclined to do it. I did search but I what I found was 50/50 on whether it needs done but the threads are several years old. So I was hoping there is some new input on the subject. Thank you all for your help.
Last edited by andre.loayza; Mar 7, 2018 at 07:33 PM.
HDF Community Team
Joined: Jun 2006
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From: san antonio
First thing I would suggest is passing on the stock crank and spending more money on a 4.375" crank; you are there now and believe me it is worth the extra $$ if you have it to spare.
The Timken upgrade, IMHO is not necessary. The SE "Lefty" bearing is a decent upgrade. There are some that will insist the Timken conversion is the only way to go and, for sure, it is the best way to go but again, IMHO, not a must. I just built the bottom end on my '05 FXSTD for a 98" build that should make 115/115 numbers and I went with the Lefty bearing. I have a builder/friend that runs a healthy 98" motor and runs the Lefty bearings. If I was building a 110" or larger motor, I would probably go with the Timken conversion.
The Timken upgrade, IMHO is not necessary. The SE "Lefty" bearing is a decent upgrade. There are some that will insist the Timken conversion is the only way to go and, for sure, it is the best way to go but again, IMHO, not a must. I just built the bottom end on my '05 FXSTD for a 98" build that should make 115/115 numbers and I went with the Lefty bearing. I have a builder/friend that runs a healthy 98" motor and runs the Lefty bearings. If I was building a 110" or larger motor, I would probably go with the Timken conversion.
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4th Gear
Joined: Nov 2017
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From: Ca
Thank you all for the input I've gotten so far, greatly appreciated. i was contemplating the longer stroke I think i will get the longer stroke. I've never rebuilt an Harley engine so at this point the order I'm going at it I'm kind of winging it, I was hoping to get some guidance/input as i do this build, if its OK to continue it on this post at least. At this point my next step is buy the new 4.375" flywheel and find someone in southern Cali that can true and balance it for me. While i wait for that I'll replace all bearings inside the crank case.
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Joined: Sep 2009
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From: deland,florida
get a S&S 4.375" stroke F/W (a OEM one wont work),also do a Timken conversion,the lefty bearings do not stabilize the crank anywhere near as good as a Timken set up.then bore your cylinders to 3.937" with a set of CP 107" pistons
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4th Gear
Joined: Nov 2017
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From: Ca
My original plan was to do the conversion the only reason i dont want to do it is that it seems all places that will do it is on the east coast and i live in the northern part of Los Angeles County. My only other solution was to by JIMS conversion kit but thats $1500 extra on something im only using once. Thats why if im ok with not needing to do it for a 95 or 98 build i dont want to do it and apply that money for something else on the build. I did buy a manual. that was one of my first buys for it when i got my Dyna.