Topic: Honda cb500 four k1 - extra clutch plate?

[roque75]

Hi everyone!!

Recently I had some gear dogs rounded and needed to change them.

I notice that my clutch had an extra clutch plate. So there was a plate between the gear and the first friction disk…
I measured the friction disks and they were fine!

I removed it and now I can’t get the clutch working properly.
Or it’s too loose and I seams that I’m forcing the gears selector, or it too tight and it seams that it’s reeving like some clutch is applied.

I know that o can reinstall it but I want to understand why since it’s not supposed to have 7 clutch plates. I think it’s suppose to have 7 friction disks and 6 plates.

Can someone help me understanding this?
I also want to be sure that installing an extra plate will not damage anything.

Cheers

[bryanj]

What model and engine number is it, Honda did do some mods early on in the 500's life

[roque75]

Not sure about the version now that I’m checking.
Engine has Cb500E-21xxxx
Frame has CB500-20xxxx

[bryanj]

That should be after any clutch mods unless a po has fitted old parts.
Check out a K0 parts book to see if it looks more like yours.
Should be a pic of K0 clutch attaced where the back of the clutch centre is a loose plate held by a big ciclip, later ones were cast in one piece

[roque75]

Mine is already cast in one piece.

But it had an extra plate between the plate already casted and the first friction disc.

Before I removing it, it was shifting ok (but with dogs rounded). 

[bryanj]

I think somebody previous has mixed up a manual and years and put the extra plate in by mistake

[roque75]

Yeah, I also think so.

But the truth is that before the shifting was working properly!

Could be any logic for adding the extra disc?

[bryanj]

Logic no, dumbness yes

[HondaMan]

I've seen the extra steel ones installed when the aluminum ones warped and the owner could not get a new un-warped one (back plate). Then he switched plate counts steel & fiber to make the stack height come out right.

And it worked!