Cylinder drops out at wide open throttle

[yamagramps]

My sled is a 1998 SRX 700. If I instantly open the throttle, the sled runs fine until about 85 mph. At that point the PTO side cylinder begins dropping out and it loses power. If I back off on the throttle the cylinder will come back and work fine. If I gradually go to WOT the PTO side cylinder will begin overheating so I have to back off before reaching full speed. I am running V-Force reeds, Bender cold air package with baffles removed from the air box, the heads are milled .030" with a thicker base gasket and a tempa flow. I have a Digitron EGT so I can see whats happening. I have installed new plugs and carb boots. The compression on this cylinder is between 122 and the other two 125. I have 170 jets on each side and 155 in center. Does anyone have any idea as to what might be happening? Your help would be greatly appreciated!

 

[maxdlx]

bypass the tempa flow and try it. I bet your problem will go away. How hot is to hot, and which carb is the fitting in. You can bypass by just unhooking the vent line. Maxdlx

 

[yamagramps]

Maxdlx,
The fitting is in the carb on the other side. The temperature was at 1360 and rising when I backed off. Thanks for the input. I will try disconnecting the vent line.

 

[maxdlx]

Be sure to plug the one in the carb. My pto will drop way cool, after a long run, but thats a rich cool thats clears itself up. Keep us posted. Maxdlx