Power valve did it stick?

[mattdenn]

Hi Guys
07 gas gas ec250, owned for a year and always run and been reliable. At the weekend whilst riding on a uphill gradient the bike note changed and i lost power. The engine continued to run but the exhuast sounded rattly and although the bike still moved it seemed to have no power at all. After stooping and starting the bike seemed fine again. about an hour later it done the same thing. with a good handfull of throttle it cleared itself again. it then run the rest of the day o.k. anyone got any ideas what might be going on?
thanks

[GMP]

Classic dirty, sticking PV.

[mattdenn]

Thanks
Is it just a case of cleaning it? and does it mean complete disassembly of the powervalve?

[GMP]

Yes and yes. Good news with a GG is you can pull all the PV parts from the cyl without removing the cyl from the motor. R&R the main flap is easier with the head removed though.

[mattdenn]

Thanks Glenn
Never cleaned one before so it will be a sharp learning curve.

[gasgasman]

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