Originally Posted by
mblgjr
I'm not speaking for 'other' aftermarket branded inserts.
However; the S5 and S7 that I've handled were fixed venturi 8mm carbs. They will not (or at least are not molded to) accept the standard molded plastic RB/Novarossi style inserts.
If you compare a "fixed" 8; vs. and insertable 8 or 9mm unit from Nova or RB you will see the difference and the "seat" where the insert is supposed to sit (which a fixed 8 doesn't have).
Hope that helps.
The S series has an 8mm carb, however it is insertable. trust me I have an S7 and an S5 both running novarossi plastic carb inserts. I don't know about the really old S series carbs but the ones you get on the MSC and L2G and even the model prior to the MSC line all have an insertable carb.
Here you go. A step by step process of putting a novarossi 7.5mm restrictor into an RB carb. This is the carb that came on my S5 L2g and is the same as the one on my non MSC S7 II
Sorry for the crappy pics.