Evo original vs Crate
Seasoned HDF Member
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From: Coromandel Peninsula New Zealand
Timken is a brand, what you meant to say is that all Evo's have a Taper Roller bearing on the drive side of the crank. They are a very different beast from a Timken inner cam bearing.
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From: W. Texas
I may have posted this earlier in wrong forum section.
I'm looking at a custom softail that has an evo 80" harley crate motor. Since Harley moved away from Timken tapered bearings would anyone consider current crate motors inferior to the original evos? the engine number is AA12X7855.
I'm looking at a custom softail that has an evo 80" harley crate motor. Since Harley moved away from Timken tapered bearings would anyone consider current crate motors inferior to the original evos? the engine number is AA12X7855.
Are you talking about the crank bearing or the cam bearing ???
WP
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From: Oxford, Nc
HD changed the TC88 left main bearing which had been back-to-back Timken tapered rollers to a straight rollers in 2003 on the TWIN CAM.
OP is confused on the engine era I would assume
OP is confused on the engine era I would assume
Stellar HDF Member
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From: College Station, TX
The engine number the OP listed does not look correct. A photo of the engine number and a few others of the engine might provide more details.
If it is an aftermarket engine, there are a limited number that have good reputations for reliability.
Paul
If it is an aftermarket engine, there are a limited number that have good reputations for reliability.
Paul
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From: Bradenton, Florida
Yeah, but common nomenclature refers "Timken" as "Tapered roller bearings". Like "Q-tip" and "Cotton swabs".
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From: Poolville
Again Timken, SKF they are all just brands and should not be mistaken for type. The Timken A2 bearing which has been in use for over a half century in Shovels and Evo's and Automobiles is the actual bearing but easier to refer to as the Timken. Have not seen a Timken inner cam bearing but have the Koyo AKA Torrington.. or even a Boca b138 full compliment bearing.. All very good quality bearing company's...
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Last edited by Hardtail83; Jan 9, 2023 at 03:17 PM.
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From: Coromandel Peninsula New Zealand
Not where I am from it isn't....
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From: College Station, TX
As has been mentioned above, HD stopped making EVO crate engines a good while back. That doesn't mean someone found one in a warehouse etc, but they would be rare at this point. Also, I think mentioned previously by someone, with the HD Longblock program, they would take your left engine case back and stamp the original VIN on the replacement Longblock engine. Ideally it would be an S&S EVO engine, but I do not see anything that identifies it one way or the other. Usually S&S proudly marks their products for easy identification. Sorry I don''t have more to offer.
Paul