Bad bottom end bog ? ET967

[hink320]

This is just an issue ive been dealing with so far this season

This wasn't an issue before? It only started having the bog this season and you hadn't changed anything before it started to bog this season?

 

[WB1994]

I have a friend having the same problem with a 964. Ran perfect last season. So far we've....

Changed exhaust
Changed every bit of electronics
Rebuilt pump including fresh drive shaft
New reeds
Swapped carb setup
Pulled head to inspect
Pulled exhaust valves to inspect

Only thing left is crank and wrist pin bearings .

 

[Wetbuffalo]

I have a friend having the same problem with a 964. Ran perfect last season. So far we've....

Changed exhaust
Changed every bit of electronics
Rebuilt pump including fresh drive shaft
New reeds
Swapped carb setup
Pulled head to inspect
Pulled exhaust valves to inspect

Only thing left is crank and wrist pin bearings .

Are you sealing the bolts with silicone?

 

[WB1994]

Are you sealing the bolts with silicone?

What bolts?

 

[Wetbuffalo]

What bolts?

On a TPE 964 you have to put a little bit of silicone on the head nuts/bolts depending on what you have to keep water from spraying into the carbs.

 

[WB1994]

On a TPE 964 you have to put a little bit of silicone on the head nuts/bolts depending on what you have to keep water from spraying into the carbs.

Yes

 

[WB1994]

By chance are you running a power factor pipe?

 

[Yami-Rider]

Cracked pfp can cause a bog. I've also seen cylinder base bolts come loose and cause an air leak/bog. Re-torque everything and pressure the motor.

 

[Matt koe 08]

I'm having the same problem on a tpe 964 had a b pipe ran perfect put powerfactor on now has bad bottom bog changed jetting pop off changed atp epic to msd I'm usually pretty good at tuning a ski but this thing is kicking my ass

 

[Roseand]

I'm having the same problem on a tpe 964 had a b pipe ran perfect put powerfactor on now has bad bottom bog changed jetting pop off changed atp epic to msd I'm usually pretty good at tuning a ski but this thing is kicking my ass

Running the pipe wet or dry?

 

[Matt koe 08]

Running the pipe wet or dry?

Dry

 

[Roseand]

Dry

Your chamber might be leaking

 

[Matt koe 08]

Take out your chamber and test to see if it has an internal leak.

Sounds good I'll try it thanks I'll let u kno

 

[iQRTurbo]

No need to remove the pipe, just cap two of the 3 nipples and put a piece of hose on the third one. Put on some lipstick and give it a big blow. If you can push air in it’s cracked. If it pressurizes and your eyeballs turn red it’s good. I’ve repaired many cracked chambers and I’ve always been able to tell in 2 seconds if it’s cracked by 2 minutes of setup.

 

[Matt koe 08]

No need to remove the pipe, just cap two of the 3 nipples and put a piece of hose on the third one. Put on some lipstick and give it a big blow. If you can push air in it’s cracked. If it pressurizes and your eyeballs turn red it’s good. I’ve repaired many cracked chambers and I’ve always been able to tell in 2 seconds if it’s cracked by 2 minutes of setup.

What if I pressurize through the nipples held 10 psi for 10 minutes that way

 

[iQRTurbo]

I’d say if she will let you pressurize her nipples for ten minutes you have a good one!

 

[newbee]

Any luck on testing the pipe. Or find out what was hurting the bottom end