Bleed vs Emulsion. The stock RD350 carbs have the 4-stroke type of needle jet... which is the bleed type. Anyways, the RD350 28mm carbs have bleed type needle jets. If that's what you need, then check ebay for them. They tend to go for under $20/pair.quote:
It's been my experience that the emulsion tubes on Mukuni two stroke carbs are different than the four stroke carbs...Bleed type vs. some other type, I forget.