from start to finish
2 month ago a bought a used 10month old good used bike EC 300 Nambotin 2009 60h or 2000km or 1400miles .
The test drive was OK but I can't wide open because the piston was new.
I believe the mid range feels normal.
Before I ride I wan't to check everything that can stop me in a race.
I checked the piston myself because trust is good but checking is better.
I release the complete cylinder - yes the piston was brand new.
I can't see any damages in the nicasil cylinder surface.
I hope I rebuilt everything right.
From the beginning there are some leaking - first I checked the float - I adjust it but leaking go on.
Then I found dirt in the tank and the carb - I clean it and install a petrol filter. No more leaking after this.
Then I checked the V-Force reed valve (2 reeds was frazzle) and I replace with 2 good used as a precaution.
I replace the plug BR8EG and the spark plug cap NGK LB5EMH.
My jettings are:
main:182
idle: 42
idle screw: 1 1/2
needle N1EF #1 from top
Temp: 5-12°C or 41-53°F
altitude: 120m
original pipe and turbinecore silencer
Today I test the machine the first time on a wider area.
The piston is 1/2h old.
In low range the torque is good and the engine feels OK but when I wan't to accelerate the engine needs a minute of silence and then he comes explosive.
Wide open is also OK.
But in the mide range this isn't a good feeling.
The new plug was often very wet!!!
My be a problem with the exhaust valve or a too low float?
I don't see a air leak.
Where can I looked for the problem?