bogging past around 4500rpm. 06 EC300

[GasGasDreamer]

I have the same bike and had a nearly identical problem.
changed from hi test pump gas to race fuel and it solved the problem 100%
my buddy has a 04 and it had started showing the same signs and his was fixed with race fuel also.
some have replied that im running lean but its not true.
it seems that the oxygen or whatever they have been adding to the fuel makes it turn into a pos.
ive always used the same motul 800 oil
the only thing that changed was to use race fuel and that solved two GG just like yours

[stian]

Originally Posted by GasGasDreamer

I have the same bike and had a nearly identical problem.
changed from hi test pump gas to race fuel and it solved the problem 100%
my buddy has a 04 and it had started showing the same signs and his was fixed with race fuel also.
some have replied that im running lean but its not true.
it seems that the oxygen or whatever they have been adding to the fuel makes it turn into a pos.
ive always used the same motul 800 oil
the only thing that changed was to use race fuel and that solved two GG just like yours

Im running 95 octane. I can try out 98 octane, even 99 octane on pumps, but compression isnt even high enough to fu** things up - even on 95octane.

Ive taken down powervalve, blasting it, changing bearings and checking that the balls are in the governator or what not. I am in need for a new bellcrank-actuator arm. So if someone have one, or know a shop who do sell one, please speak up.

This could mostly be an electrical problem, as in CDI, coil, but OK to check the PV anyhow I guess.

[GasGasDreamer]

Originally Posted by stian

Im running 95 octane. I can try out 98 octane, even 99 octane on pumps, but compression isnt even high enough to fu** things up - even on 95octane.

for me, I think it had to do with the pump additives.
we have gas stations that sell race fuel from the pump, just like diesel or gas.
im not saying youre pushing the limits of the fuel.
im saying that I changed to race fuel and the bike rips again

[motopsycho87]

Never had any problem running 95 or 99 on mine...

[stian]

Video of engine running, full throttle.

https://www.youtube.com/watch?v=xPVy...ature=youtu.be

Tested new CDI, new coil, no change. Im taking the engine for a close up tuesday.

[DaveJ]

So what was the final diagnosis?

[stian]

Originally Posted by DaveJ

So what was the final diagnosis?

thought I deleted this topic.

It worked 10min down the road. 3x0,5mm cylinder gaskets, head shaved 1mm, squish 1.6mm. AS1 with 178,40 pilot, N1EG, top clip, 1,5 turns out on the airfuel screw. Vforce reeds OK. New bellcrank, governator OK. New Br9eg. 25h piston withing specs, rings well within spec (0,30). PV without arm spins smooth as butter, new bellcrank arm, also spins nice wired up. There is needing some force to turn it thought, but it is normal.
New oil, new fuel (ron 95). Cylinder good, all new gaskets. No smokey. New crank-seals, new bearings (hole engine). PV cleaned.
Tried KTM working CDI, and I swapped out the coil, and the stator.

Still problems. Going to change the carb out with a AS2 i have laying around.

Hate this fu**ing bike