Reply To: GT125 2003 Performance Issues
Hey Mike,
If you can see the filter filling up, that’s good. That means the TAP is on from the tank area.
Next, take the fuel hose OFF the carb and point it to a bucket , then see if the fuel pump is shooting fuel out ? The pump is the one that sits near the battery ofcourse.
- This will check if there is enough vacuum to open the pump so it can do its job, it works in a pulsating nature of the engine intake cycle strokes , and it needs fuel flowing through it to work. Henceforward check the tank tap is working first by observing if you see the fuel flowing through the filter.
- Consider the hoses not to be kinked, the bike does also like gravity assist, so consider how the neat the lines are routed.
If the pump is good to go, then ofcourse the carb needs addressing again…
- Take the pilots out, and look in the sky. If you can’t see through them, there is debris inside you will need to clean them harder. It is these jets that will cause the bike to act moody and cut off.
- Mixture settings all good from my last advise ?
- Get a clean hose..connect it to the carb, consider your mouth please as i rarely advise this redneck method of doing something but lift 1 float, blow through the hose , and let go of the float. If you sense air is flowing through with ease.
Repeat with another float. Then you know your fuel valves do open/close based on the float raising or resting on the needle.
If the slide needle is on the 3rd grove pointing towards the tip, place it on the 4th groove facing the tip, that lifts the fuel up sooner as bike revs increase.
Check the slide cap isn’t leaking any air by ensuring the slide caps were flat and screwed in well, as if there is a chance of air leak, the slides won’t lift efficiently , thus the bike dies when revs increase.
I haven’t address the air intake system (orings, manifolds, airbox) as you have said you installed them as religious as you could.
I hope after this you can finally have results and test ride the bike yourself to see how it is behaving.
if the rpm needle drops fast ….and the revs stay at 1700 rpm (ideal) hot, the bike is OK.
if the rpm needle drops really slowly … you either have a pilot jet clogged that’s hunting fuel or there is an unknown air leak.
// Meditation doesn't mean you have to sit still....
