Reply To: 2005 GV250 Running rich
I have a 2005 GV250 that seems to be running way too rich. The CR8 plugs in it are consistently wet . Carbs were cleaned last year, fresh gas, decent spark. At idle when cold I have visible fuel vapor from the exhaust. It clears up when warmed up, but you can still smell the fuel.Quote
My 2008 Gt250R also ran rich, even before i put 90 & 92.5 JETS in the carbs. Jets are super easy to swap over, just unscrew them & screw a replacement in.
1. Did you put new FLOAT-VALVES in the carbs? Very easy to do. Keep your original FLOATS as their height should be good, but change the float-valves if they not new.
2. I removed the AIRBOX completely from my bike. I put 2x AIR-FILTER PODS on the top of the carbs. Fixed the rich running bike, sounds freaking aweome & i have all this room under the tank for more air-cooling & i intend to put some HEAT-INSULATIUON under the tank to keep my fuel cooler.
3. I had great success smoothing out the fueling by TURNING the IDLE SPEED DOWN to about 1100RPM’s. The manual says to set them to 1400-1500 RPM. But i found if you lower the idle speed the bike is much smoother acceleratiing throughout the entire rev range. The only problem is it makes the bike a bit harder to start. But only because i don’t use CHOKE to start the bike – the choke floods the carbs at the slightest touch. My carbs were toast & i haven’t fixed the choke but the bike runs well.
My carbs are not great but they were really bad and caused big FUEL Leaks into the carbs & into the airbox. I never fully fixed the carb issues – they still leak a little fuel into the air-filter but i can redline my 250 now and get about 150+km/h so it’s not bad.
I bought a Chinese dual-carby to try out, but the throttle is not in the same position so it may not be able to use it.
-----LaserBeam---->