Midlake Crisis
Site Supporter
- Location
- Bakersfield, CA
I have an intermittent bog issue that happens usually right after a nose stab or vertical wake jump.
Things have gotten much better by cleaning up exhaust leaks, JSS coil, etc. but still reoccurs. I have also eliminated water in the tank, and have a new check valve on the tank pointed in the right direction.
I discovered this info today on the Factory Pipe website, and am wondering if anybody has experience with this solution. I usually have the bog when the ski revs high as I pin it to get airborn, the pump unloads and revs even higher, but then decelerates quickly as I land the trick and/or pull out at low speed. it sounds similar to what they are describing:
FROM FPP:
Engine Hesitation When Accelerating After a High Speed Deceleration
You may find it desirable to increase the number of anti-siphon valves (part# BN34/107), If you ride very fast and find that you have a noticeable stumble when reopening the throttle after a long, high speed deceleration. This is caused by excess fuel in the carb. The engine revs fairly high while decelerating, but it uses very little fuel. The fuel pump still pulses hard, but there is no demand for the fuel. A small amount of fuel will overfill the fuel chamber, leak through the high speed circuit and get deposited on top of the closed throttle valve. This fuel causes a momentary rich condition when the throttle is reopened. The solution is to use one or two additional anti-siphon valves. Never use more than two extra, and recheck your calibration after installing any extra valves; in some cases extra valves can adversely affect throttle response.
What do you all think?
Things have gotten much better by cleaning up exhaust leaks, JSS coil, etc. but still reoccurs. I have also eliminated water in the tank, and have a new check valve on the tank pointed in the right direction.
I discovered this info today on the Factory Pipe website, and am wondering if anybody has experience with this solution. I usually have the bog when the ski revs high as I pin it to get airborn, the pump unloads and revs even higher, but then decelerates quickly as I land the trick and/or pull out at low speed. it sounds similar to what they are describing:
FROM FPP:
Engine Hesitation When Accelerating After a High Speed Deceleration
You may find it desirable to increase the number of anti-siphon valves (part# BN34/107), If you ride very fast and find that you have a noticeable stumble when reopening the throttle after a long, high speed deceleration. This is caused by excess fuel in the carb. The engine revs fairly high while decelerating, but it uses very little fuel. The fuel pump still pulses hard, but there is no demand for the fuel. A small amount of fuel will overfill the fuel chamber, leak through the high speed circuit and get deposited on top of the closed throttle valve. This fuel causes a momentary rich condition when the throttle is reopened. The solution is to use one or two additional anti-siphon valves. Never use more than two extra, and recheck your calibration after installing any extra valves; in some cases extra valves can adversely affect throttle response.
What do you all think?
