97 CR250 problem

[Hiddentrail94]

I don't understand my problem, I gas it, everything is fine once I get to the power band. When I take off it seems the motor doesn't want to do it. But the band. It works

[skippercross]

I don't understand my problem, I gas it, everything is fine once I get to the power band. When I take off it seems the motor doesn't want to do it. But the band. It works

Have you looked to make sure if the powrvalve ain't stuck?

[RedmistNZ]

Have you also checked all the breather hoses on carb? I had the same symptoms on my '06 with new top end.

After doing a jet change the float bowl breather hose bent 90 degrees,  forming a kink in plastic hose !!

Bike ran fine up to 3/4 throttle then would bog a bit in the powerband and then take off again.

I thought jetting was too lean so changed back to previous settings - same symptoms.........wtf??

The float level was inconsistent due to carb not breathing properly, new breather hose fixed that.  

Hope this is helpful and good luck.