Here's the deal -- I have two F4i's -- one I bought from an auction wrecked and the other is my mostly clean stuntbike. The one I bought from the auction doesn't quite run right. Some of the cylinders aren't firing -- it sounds like an electrical problem. After it runs, and it sounds like a Vtwin at low RPMs, it drains gasoline from between the header and the slipon, so it's obviously flooding some cylinders which aren't firing. I have replaced the rectifier, the coils, the sparkplugs, the ignition wires, the cdi box, and the wiring harness. I've also replaced all fuses and relays. It's been through two different fuel pumps that worked fine on my stuntbike. Still it sounds like a Vtwin and will not run correctly. The motor doesn't sound like it has any problem with it; it runs smooth other than sounding like a Vtwin. It doesn't have any clacking or anything, but it does eventually conk out after it runs for a little while and the gas pours out. Any advice on what this problem could be? It would be greatly appreciated!

 

for anyone in the future the problem was a fule pressure regulator :YEAH

 

did it bog out when you gased it in the air?

 

sounds like to me that you have a couple of fuel injectors stuck open dumping fuel in the cylinder and it is squeezing it out the exhaust . just for your info you can't compress fluid in a cylinder