Good morning. I recently purchased a CRG Road Rebel with a CR125. ran great when I got it but given the unnown hours on the top end I opted to put a fresh top end on the motor and the throttle response on the top end is excellent, though I have a question regarding the low to mid range response. It seems like a dog on the bottom end. Kart will not launch from a dig and doesn’t seem to wake up until 6-7K rpm. The CR125 engine is a 2004 model with the OEM Keihin carb that has the TPS sensor. I’ve broken in the new top end and noticed the plug is reading very clean so the motor is not running rich or lean. The engine has the plugs for the power valve which is not connected and I was curious if the lack of responsiveness on the low and mid range RPM is expected with the power valve not operational or if the carb is the likely culprit and I can see much better responsiveness on the lower end of the RPM range even with the power valve not running if I address the carb. Appreciate your insights as I don’t want to chase the problem with parts if the power valve config is the reason for the lack of low end.