I have a 42mm Mikuni that would be perfect for a 107. The 38mm Edelbrock will starve that 107 for fuel. also there is a stamp on the edelbrock Qwicksilver next to the pat numbers that is 38 or 42.I just picked up a used Edelbrock Quicksilver 2 carb. Was wondering if anyone has used an Edelbrock with good or bad results. I have never had an Edelbrock motorcycle carb. I won't be using it for a while and was wondering if it will be worth using. I may try it on my 107". Not sure if I can jet it big enough for all this motor. I would love to hear back from anybody that has used one. Thanks.