Super Jet superjet no bottom end no top end

[superjetchet21]

hey guys i have a 2001 yamaha superjet with a 701 with fresh rings on the top on the ski ran aweomse with the stock pipe i threw a b pipe on there and put the new jets in and now it runs terrible but i cant get it dialed in it feels like its building up on bottom and and once i get going if you hold it 1/2 throttle it wants to go it pulls hard but full throttle it builds up again i also put a 2012 SJ impeller on there and a pump cone i just cant get this thing dialed in anyone have any suggestions. im about to just throw the motor and carbs out and buy biggher and better but i would like to dial this thing in please help

 

[BruceSki]

What are you water screws set at on the pipe?

the 08-up impeller usually wakes up with a pump cone on it. I'm surprised you are having issues and would attribute them to either carbueration or water screw settings on the pipe. A dried out pipe makes power.

 

[superjetchet21]

well so far ive rdden with all a quater open which was eh the other day i rode with all closed which was terrible and one time i dide top middle closed and then bottom a quater open but i just feel it should be running alot better and i cant figure it out.

 

[txsuperjetfreak96]

U dnt wanna run with all closed will get way to hot, try with bottom open a lil, rest closed probaly your problem

 

[superjetchet21]

alright and how about fuel mixture screws just stock setting? or just ride and keep ing with it?

 

[BruceSki]

Best bottom end I've ever noticed was parallel dual cooling(1 line to pipe, 1 line to motor)

bottom and middle screws closed, top open 1/8-1/4

(*just remember with parallel cooling there is much more pipe pressure so you have to close way in on the screw) with single cool or dual cool through the motor first, the water pressure in the pipe is lower so you may have to open the screw more than that. The number or turns is arbitrary, just dial it in where the pipe sizzles but wont melt hoses.

 

[superjetchet21]

ok yeah i had dual cooling on the manifold and since its only a 701 it ran like crap so maybe ill try that way or just keep screwing around with the pipe.

 

[Vumad]

What is your jetting and pop off?

 

[BruceSki]

How many pissers? You have to get that pipe temp and pressure dialed along with your screw settings.

 

[superjetchet21]

spring is stock on carb jets are 130 today i took it out adjusting the water fittings and its getting better slowly but not 100 percent still no botttom end and i have 1 pisser