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[snowrider13]

With out finding a qualified machinist in my area who I trust, would/does the "lefty" bearing that HD sells serve the same purpose? Would be using on a roller bearing bike. 2003.

[HD Street Performance]

The "lefty" is just a replacement updated for your original part. Anybody with the right tools and experience can do the job.

[HILLSIDECYCLE.COM]

They work just fine.
And actually, prior to the Timken conversions, and the advent of the Lefty, we built some very powerful engines utilizing the OE roller set up.
S&S 116"s to be exact, with power squaring off in the 130's.
4" hole X 4 5/8" arm.
Never had any issues.
When the OE cranks were sissoring constantly years ago, many folks thought the roller bearing was the issue, in chicken/egg thinking.
Not so, as we all know now that the crankshaft assemblies were not built correctly from HD.
Scott

Oh yeah, almost forgot sharing is caring.........

[prodrag1320]

personally,i wouldn't take a motor aprt to replace a bearing with basicly the same bearing (exept for being black & saying "screamin eagle"),do the job right & install a Timken conversion

[HILLSIDECYCLE.COM]

That's all they really look like.
Scott