Reply To: My motorcycle loses power at high RPMs and full throttle – Hyosung GTR
Check your float height , after every ride on my carb bike = the big filter is usually full. Or your float needles are jamming causing some internal engine slow leak of fuel in to cylinders = Your manifolds will be “wet†inside as a hint. Also open “OIL FILLER CAP†( on the clutch cover) and sniff inside hard. ==> If you smell fuel => change oil before riding again. Can you also clean your spark plugs , go for a short ride => wait to cool down => Take pictures of spark plugs so we can see the mixture ? Simon also has the EFi 250 motor, he knows if the fuel system is too rich or too lean,. Pictures of spark plugs will help OR It could be electrical! (Coils? Stator unit?) (Since stator is also part of ignition system = high revs , more pulses to cdi , cdi talks to coils to spark the plugs. , dashboard tells you how much RPM engine is doing
Okay, I’ve never checked the float height. One question, should I change the needle jets on the carburetors? Because in the manual, I see that for the 250 and 125 they are different. The spark plugs now are new CR8E, I’ve ridden 150 km today, I’ll take them out and upload a photo. This might take a bit because I’m a bit busy this week.
If the float needles aren’t working, the fuel filter should lower the level when the bike is off, right? It doesn’t. Last week, I removed the airbox and the carburetors to change the spark plugs, and the intake manifolds weren’t wet with gasoline. The fuel filter only empties if I accelerate to the maximum.
Do you then see it’s alright how I’ve connected the vacuum lines?
Thank you very much to you and Simon for the help.