clutch o-rings???

[vs7]

So I was breaking belts...Took apart the clutch--over the course of about an hour I managed to pry off the cover which houses the pins; it was so full of belt debris it would not just slide off. I ruined the o-ring at the top that is supposed to keep the debris out, though I suspect it wasn't doing its job anyway. Does anyone know what size o-ring I should get to replace it? Its a 150cc gy6 scoot.

[vs7]

I am wondering if most people run the stock clutch and, if so, do you often find yourself cleaning it?

[vs7]

I should add that once I thoroughly clean the clutch I don't break belts. I'm just wondering why I have to do this so often. I am just guessing that the stock o-rings are crap.

[vs7]

http://www.scootdawg.net/attachment.php?attachmentid=1051&stc=1&d=1538849157
So to sum up all my ramblings on, I am trying to find a quality replacement for number 15 (o-rings) for a 150cc clutch:hmm: