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Lefty bearing VS Timken

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Old Jan 7, 2016 | 01:55 PM
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Default Lefty bearing VS Timken
Hi everyone;
I wonder if it is cost effective to swap a lefty for a Timken? I guess so if going over 125 ft/lbs or high revving, but what about a mild 110 or even a 120
ST?
 
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Old Jan 7, 2016 | 03:16 PM
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Originally Posted by avn514
Hi everyone;I wonder if it is cost effective to swap a lefty for a Timken? I guess so if going over 125 ft/lbs or high revving, but what about a mild 110 or even a 120
ST?
I would not do it.
 
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Old Jan 7, 2016 | 05:31 PM
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Tnx;
The engine would be taken down anyway (crank welding), but wouldn't want to Timken
just for the sake of it...
 
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Old Jan 8, 2016 | 05:46 AM
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if your going to tear it down to install a SE "lefty" bearing,i would definitely do the Timken conversion.the SE "lefty" bearing isnt any better than the stock bearing.if the HD lower ends where a one piece crank,the 2 roller bearings would be OK,but being a 3 piece unit,the timkens give the lower end much more stability
 
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Old Jan 8, 2016 | 08:23 AM
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Originally Posted by avn514
Tnx; The engine would be taken down anyway (crank welding), but wouldn't want to Timken
just for the sake of it...
You left that out of your OP. If tearing down anyway, replace the roller with the Timken.
 
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Old Jan 8, 2016 | 08:44 AM
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Didn't know the lefty isn't really better than stock; will definitely do the conversion!
The engine (120R) has to be be taken down anyway...
 
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Old Jan 8, 2016 | 11:22 AM
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A Timken locks the wheels solidly in that left case.
Scott
 
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Old Feb 8, 2016 | 02:06 PM
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Originally Posted by Hillsidecyclecom
A Timken locks the wheels solidly in that left case.
Scott
Is it tricky to install to get the proper bearing preload?
 
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Old Feb 8, 2016 | 03:05 PM
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Originally Posted by InthewindMN
Is it tricky to install to get the proper bearing preload?
Not really but a service manual is highly recommended. A "dummy" shaft to set preload is pretty handy and will save time.
 
Last edited by djl; Jul 12, 2016 at 09:37 PM.
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Old Feb 8, 2016 | 05:18 PM
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I make up dummy shafts if anyones interested.a must for setting up any timken motor from pans to TC's
 
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