I have a 1984 XP150 that lean sneezing horribly. no matter the rpm. It sneezes out of the crankcase nipple (vacuum line?), and can even shoot a spark out of it when you increase the rpms.
However, if I hold my finger over the air bleed jet on, what i believe, is cylinder #4, the sneeze stops completely. Sounds like the carbs would be dirty, but they have been rebuilt, and all passages seem clear. What could be causing this? And what is the crankcase nipple for that it is sneezing from? It looks like it would go to the VRO, but it doesn't.
Here is a picture of the sneezing carb, with an arrow pointing to the jet i can cover with my finger to smooth it out.
This is the nipple that the sneeze is coming from on the crankcase. it isnt sneezing out of the carb either. I just placed a hose on the nipple to direct it away from the back of the VRO. Compression is good on all cylinders. I have sprayed some brake cleaner around the carb, and hear it smooth out. spray it into the carb, it smooths out. So I know it is too lean, just cant figure out why!!!
Any help would be greatly appreciated!
However, if I hold my finger over the air bleed jet on, what i believe, is cylinder #4, the sneeze stops completely. Sounds like the carbs would be dirty, but they have been rebuilt, and all passages seem clear. What could be causing this? And what is the crankcase nipple for that it is sneezing from? It looks like it would go to the VRO, but it doesn't.
Here is a picture of the sneezing carb, with an arrow pointing to the jet i can cover with my finger to smooth it out.
This is the nipple that the sneeze is coming from on the crankcase. it isnt sneezing out of the carb either. I just placed a hose on the nipple to direct it away from the back of the VRO. Compression is good on all cylinders. I have sprayed some brake cleaner around the carb, and hear it smooth out. spray it into the carb, it smooths out. So I know it is too lean, just cant figure out why!!!
Any help would be greatly appreciated!