Steering head: taper rollers, press or mix and ??match??

[bikenut]

Yes, but htf are you gunna get the old cone off and the new one on, or are you just gunna replace the bottom yoke complete !

Take that to its logical conclusion, get a new bike when the oil needs changing ?
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nuts about bikes

[MarJay]

He plans to leave the cone and put a new race over it... Which I think is a mistake. You don't know how much wear is on the old race, you don't know the tolerances used by the different bearing manufacturers and you don't know what crappy chinese fab shop knocked up the parts.

It is theoretically possible to interchange bearing parts:

If they are the same make

If they are the same model

If they are both brand new

If they aren't chinese copies.

That's a lot of ifs.
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British beauty: Triumph Street Triple R; Loony stroker: KR1S; Track fun: GSXR750 L1; Commuter Missile: GSX-S1000F
Remember kids, bikes aren't like lego. You can't easily take a part from one bike and then fit it to another.

[bikenut]

Yep, he shows talent as he says he has changed a main bearing on a 50cc crank, and/or buggered a puller in the process.........

Similar task.........did he get a new/s/h crank also ??
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nuts about bikes

[Riejufixing]

Well that worked out OK. Components interchangeable. Cleaned, greased, refitted.

[bikenut]

Same protrution of the steering tube and enough upper thread available, some pics would help.
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nuts about bikes

[Riejufixing]

"Components interchangeable. Cleaned, greased, refitted." Statement, not question.

[bikenut]

so a pic will say it all then !
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nuts about bikes

[MarJay]

[Riejufixing]

[MCN]

TLDR.

Redundancy max+ to fit a new part of a bearing with an old part.

If you cannot replace all of the bearing system then leave things as they are.

The point with roller bearings is that a lot of wear is invisible to a naked eye. The wear takes place under the surface. The surface of a roller bearing flexes in service and it it this part that most commonly fails. Pitted surfaces one notices in 'failed bearings is usually due to not being replaced soon enough.
They should be replaced long before they become pitted.
That can be determined by OEM service guides or hard won experience.
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Disclaimer: The comments above may be predicted text and not necessarily the opinion of MCN.

[Riejufixing]

[cb1rocket]

still bad practice, that's like putting a new chain on worn sprockets.
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Honda H100S2 Rebuild - https://www.bikechatforums.com/viewtopic.php?t=253852

[MarJay]

[Riejufixing]

So tell Skef & others about it. This is becoming like discussing Brexit with that other fellow. I'm out.

[MarJay]

[Suntan Sid]

Dremelling the thing off is not difficult!

Copied this from my rebuild thread:-

[MarJay]