My idle on Derbi senda x-treme 72cc 2-stroke with a dellorto carb 21 is too high (2000-2500rpm) and it doesnt fall.
Theres not a problem with the throttle cable, there are no air leaks on the vacuums and the idle screws are adjusted fine.
Also the carb is clean.
What could the problem be? When i put 1st gear in theres a hit on the gearbox since the rpms are high and it will destroy it. Sometimes when i put 1st gear the engine stops after the hit.
Please i need an answer fast because i am going to sell it in 3 days and the buyer will hesitate with this problem.