What’s the difference between clutch slaves on 5th, 6th and 8th gen bikes?

[Stray]

Hello All, 

 

Can you please school me on the difference between different models’ clutch slave cylinders? 

 

Looks to me like the early 5th gen (‘98-99) are one part number and all other models are interchangeable. But they look identical to me! 

 

Is there a difference in piston size or something? Are they all interchangeable? 

 

Oberon make a trick clutch slave for 1998-99 models only. That got me thinking there must be a difference. 

 

Looks like the early 5th gen clutch slave is shared with quite a few Hondas, like rc51 and some mid-naughties Fireblades etc. 

 

I ask ask because I’m eyeing up a nice low mileage 8th gen unit for my 1998 engine. Just want to make sure it will work! Does the clutch cover change at all? 

 

Thanks in advance, 

 

Stray 

[Stray]

Been doing some research on this and it turns out 5th gen clutch slave has 35.6mm diameter whereas 6th gen has 33.5mm. 

 

Afternarket Oberon clutch slave piston is apparently 38mm but only marketed for 5th gen (possibly not enough clutch disengagement on 6th gen as piston too big?). 

 

Stray