Maintenance & Technical > KX500 Original

Billet shift forks?

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cwtoyota:

--- Quote from: k9Mike on September 27, 2019, 05:30:49 AM ---Again, I'm def no expert, but I think hardened steel can be milled/machined.

--- End quote ---

The proper way is to machine it in the annealed or normalized state, then heat-treat and grind. 
Hard milling and hard turning are fairly troublesome.

I've done some parts for my other bikes...
Of course, now that I'm into this KX500 thing, I'm considering manufacturing certain gears and forks here in my shop.

Here's an older 1st attempt prototype shift fork for a YZ tranny upgrade I run in my own bikes:

sandblaster:
Nice.
Mfg them with a replaceable pin.
After machine and heat treat have them Industrial chrome plated.
Very high lubricity and they will last forever..

cwtoyota:

--- Quote from: sandblaster on September 28, 2019, 03:20:19 PM ---Nice.
Mfg them with a replaceable pin.
After machine and heat treat have them Industrial chrome plated.
Very high lubricity and they will last forever..

--- End quote ---

Hard chrome like that stocker would be a good idea for production.
I thought about doing replaceable pins on those YZ forks, but there's not much meat there for pin-bore depth (less than a diameter).
There's a nice generous radius where that pin meets the body of the fork.

I throw out the stock cross-drilled, hollow rod (or rail) and replace it with the longer solid tool-steel rod.  They don't flex or bind like the OEM ones.

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