Thanks, any snippet of information helps! Standard RD350 ones would be OK but I want to cut out the bridge piece if possible and I'd need the 2-stage ones for that.
Hi, obtained the reeds from the USA (607 or 608 I think they are) and did the mod yesterday including removing the bridge from the intake. I also drilled the 'heart' under the air filter.
I have a bit of a blockage at the moment because it's dying on the throttle (as if it's cold and needs choke) but it was doing that before so it's not related to the reed valve. I should probably have sorted it first before doing the mod...