I have a pyramid derbi. I upgraded to a 16.16 sha and carbon reeds. Stock everything else. I enlarged the stock intake for the new carb.
After I made these changes my bike doesn't idle unless the choke is on. Runs okay with full throttle, but if I ease up it wants to cut out unless I put the choke back on.
I've tried jetting at 76 and 79, but I don't think it is the jetting.
Could the carbon reeds be causing this? I replaced the stock metals ones.
I am hitting around 30 right now.
Maybe my exhaust is limiting me? It is stock.
I am new to the derbi/variator world!