Carburetor Yamaha blaster 760 Stock

[pioui1]

I just notice that the stock jetting on the 760 twin 44 on a Blaster 2 is different then what I am used to with a Superjet
, my set up is

115 low jet
high jet carb #1 is 135 and the number 2 is 137.5
needle and seat 1.5

I look on a yamaha dealer and I saw 135 for the number 1 and 150 for the number 2
the Carb # 2 is the one with throttle

I am very surprise with the needle and seat at 1.5

Is this normal

thank you

 

[kevbo]

Twin carbs don't need any larger N/S because they have time between intake strokes for the bowl to fill. Some of the big triples used 1.2 N/S. Single carbs on a two cylinder engine should have more N/S area than all the jets combined or else It becomes the main jet when pump pressure falls off due to air in the line.

 

[WB800BLASTER]

for the b2 it is staggered as the rear detonates under load if it was not. this is due to hull design and weight.