Recently i have been running issues with my carb. Wide open throttle was empty feeling (as if no/little fuel is flowing). Went to planet to get it checked. ah chong rode my bike and agreed there was something wrong with my WOT. He opened the top part of my carb and replaced the spring and the rubber diaphragm. Initially problem was remedied but after a while the problem persists again. So went back to ah chong and he replaced the same part the 2nd time. Ok for a while then problem came back again. So came back third time, ah chong gave up on changing that particular part and he changed my carb to a 2nd hand carb. So far so good, but after a week there is some feeling of the problem reappearing slowly. Ah chong told me my air suction valve has also spoilt cos my exhaust would pop during deceleration and i told him no need to change cos i dont want to pay additional. Besides it sounds good haha. I researched on the internet and from what i learn, the air suction valve only function to supply air to exhaust gases to ensure complete combustion and reduce emission. Is there any possibility that the spoilt air suction valve is causing my carb to spoil again?
Any suggestions guys? Im quite sian to travel back to planet over again. I missed my old carb when it was working. FC, acceleration and top speed was good. Now this new carb doesnt idle well and acceleration a little sluggish. My phantom has been problem free for the past year but now many problems surfacing. Dont want to spend money more than I should cos im just a student.