KX500 WR or overdrive transmission, is it possible?

[Sandblaster]

Wow!
That sounds great!
Are you going to offer your services when done?

[81cr450]

Well failure #1 , kinda. It goes in all gears just a slight neutral 1st gear rub going on I'm sure it'll be obvious "where" the touch is going on when I open it back up. Rode for 30min or so drove it in every gear & did fine other than the little damn chatery box of rox sound & fifth would only engage or disengage clutchless ??? I was your gonna ruin it noises just you got issues so hopefully thats a plus
Arghhh I'm tiered & I gotta do it again

[Sandblaster]

I didn't know you were that close to trying something.
That's cool
If you ruined the gears or shafts let me know... I may have an extra set I'd be willing to donate to the cause.

[81cr450]

Just sucks cause the bikes gotta come clear back down. I can see why fiddling with the trans hasnt been done more.
Thanks for the offer on the parts. I dont think I hurt a thing just marked them to see where the problem is
First should just be a shim adjustment or maybe a slight shave on a gear, fifth really has me boggled though where thats the complete opposite end of the trans. Hope its apparent.

[Sandblaster]

Yeah, that's quite the job assembling and disassembling and reassembling...
Keep us apprised as this could really help a lot of fellow KX riders...

[81cr450]

Thinking about it today, I think I got it figured. I used hardened valve spring shims for the input shaft washer on the clutch arm side , they were bigger in OA diameter than the stock one so theyre rubbing on the 5th gear tooth tip , gotta be it. the other bit is just playing with hardened valve shims on the other side to get the depth right, thought I had it . feeling better about it today anyway. I know where the crucial measurement will be for replicating the process too, whether anyone will want to... Billet hub is gonna need to be part of this , stock has a steel insert in the center & narrowing that area to .475 just seems like an aftermarket hub might be better. Sorry if this is just random blather at this point , but it helps to think it through. I want to have it "working" by the first of Nov, so I can take it to vegas & let KXPegger ride it so I have a witness
As for pics I have a bunch & its basically what I commented on doing on ,that other site, but I need to get it right before I detail it. It would be nice to have you help with it Sandblaster as you do excellent presentation. Delete my nonsense as you see fit & all that

[Sandblaster]

I'll be happy to help any way I can.
If you want, send me the pics and I'll do the work up here and then transfer it over to kxriders.
You mentioned a billet hub?
Which hub would that be?

[81cr450]

Dur billet not the right word , just thinking after market without the insert, Im just a little nervous the insert might spin in the hub now

[81cr450]

I did it. No box of rocks sound, 5th is smooth. Ride tomorrow weather permitting . Raining right now & dark but initial run up & down the street. I gotta get the other computer up & sort pics. Woohoo

[Sandblaster]

That is great news!
Did you ever figure out what percentage of under drive you'll achieve with that gear box?