300/440/550 1994 750 sx jetting problems! low bog!

[550headache]

my buddy bought a 750sx that has a factory wet pipe on it along with a SBN 44 carb and aftermarket intake. the ski starts and idls fine and anything past halfe throttle to full throttlethe boat screams! from off idle to half throttle there is a flat dead bog. any ideas on jetting? thanks for the help!

 

[u887266]

What kind of intake is on it? If it has a aftermarket intake, try this jetting. 120 low, 150 high, and put your pop-off at about 14psi. Try putting both the screws 1-11/2 out and start there.

 

[550headache]

it does have a aftermarket intake mani. i'll try that jetting. what are you running for a needle and seat? i dont have a pp guage. we ride low elevation. thanks for the quick reply!