Reply To: need some help! with my gt125rc

[Kernow]

I would say slippy clutch. Engine revs would climb without immediate speed increase, especially under high exceleration.  How old is the oil/what oil have you used? Is clutch adjusted properly (where is biting point on clutch lever)?

https://powersportsguide.com/motorcycle-clutch-maintenance/        Here is loads on clutch adjustments and symptoms.