This Pilot Jet Kit is for our aftermarket 20mm Carb (Not Keihin PC20) and includes the following sizes (stock size is an 35): 38, 40, & 42. IF YOU DO NOT HAVE ONE OF OUR 20MM CARBS, PLEASE DO NOT BUY THESE AS THERE ARE NO RETURNS/EXCHANGES ON JETS AND THEY ONLY WORK ON THE CARB MENTIONED.

These fit the 20mm carb that comes in the 88cc bore kits and also the 88cc bore kits with race heads & 20mm carb.