Top end power

[Nicktamps]

Hi all. So, after a bit of advice again. I've got a 2015 ec250 and I've noticed in the last ride that there is no top end power there. It's like it's going flat when it's revving higher. The bottom end grunt is still there and when I'm going slow through climbs or whatever I don't notice it. But as soon as I try to get a bit of speed there's nothing there. My mates got exactly the same bike year bike as mine but a 300. He's ridden it a few times and after every ride he says it's like the power valve ain't kicking in

Other than that the bike rides fine. Kicks first time. Idles lovely


Any help greatly appreciated

[Anders]

Perhaps your friend is right? Did you check the power valve operation? Take off the expansion chamber and the right hand power valve cover. Start the motor and look at the actuator. It should move as the revs rises.

[Nicktamps]

Awesome. I will try that tomoro and get back

[rodent]

I had the same issue from brand new, it was the power valve adjustment.

[Nicktamps]

Originally Posted by rodent

I had the same issue from brand new, it was the power valve adjustment.

Cheers mate. So what did you have to do to adjust it? Side of the engine off is it?

[rodent]

Mine's a '19, you have to pull the large nut on the right hand side of the engine and adjust the grub screw and nut.

Download link for '15 manual below. Adjustment is on page 79.

https://gasgas.com/index.php?mact=CG...template=false

Unlike myself, hold the screw and undo the nut a few turns(CCW) and hold whilst turning the screw CW till it stops. REMEMBER TO COUNT HOW MANY TURNS SO YOU GET AN IDEA FROM THE CHART WHERE YOUR SETTING WAS BEFORE YOU RE-ADJUST.

[Nicktamps]

Originally Posted by rodent

Mine's a '19, you have to pull the large nut on the right hand side of the engine and adjust the grub screw and nut.

Download link for '15 manual below. Adjustment is on page 79.

https://gasgas.com/index.php?mact=CG...template=false

Unlike myself, hold the screw and undo the nut a few turns(CCW) and hold whilst turning the screw CW till it stops. REMEMBER TO COUNT HOW MANY TURNS SO YOU GET AN IDEA FROM THE CHART WHERE YOUR SETTING WAS BEFORE YOU RE-ADJUST.

So I've already done this but my interpretation of what it's saying is to run the screw all the way clockwise until it stops. Then back it off 3 turns for it to be at it's fastest. Is that wrong?

[rodent]

Originally Posted by Nicktamps

So I've already done this but my interpretation of what it's saying is to run the screw all the way clockwise until it stops. Then back it off 3 turns for it to be at it's fastest. Is that wrong?

No, that's correct

[Nicktamps]

Originally Posted by rodent

No, that's correct

Okay. I'm Gona have to get it apart later to see if the power valve is actuating

[rodent]

Cool, While you're doing that I'll have more beers and pass out