scooter idls fine but when rev it cuts does nothing

Basicly i have a sym jet 50cc, i have installed a 100cc sym jet engine , The engine starts fine and idles fine but when i rev it it does nothing i have checked the rev cabels ect i have tryed two different carbs on it and still the same, it revs up the tinys little bit but thats all it does, maybee i should get a 100cc sym jet cdi unit would that work? because iv read some were that you cant use a 50cc cdi unit on a 100cc engine would that be true, would appreciate help thanks , luke.

 

i did adjust the mixture screw and nothing happend i meen normally it either dies or revs more doesent it if ya mess with it but it did nothing , i know its not the carb tho because i have bought a new one and still does same ???

 

Your turning your mixture screws and nothing is happening? is that even possible you dont notice a change in engine sound/rpm

 

no no change in rpm or engine sound just stays the same :/

 

The Cdi Needs Changing as its all setup for 50cc's of power...

And As for tuning the Carb and nothing happening your Carb is setup wrong your telling me you can turn both screws fully in and out and no change in rpm, Even if your cdi is Messed up it cant stop the amount of fuel Going through the carb when you turn the Idle Screw thats a mechanical Procedure not electrical so its carb related 100% imo

 

but i have changed the carb and bought a new one , erm one other thing i did witch i shouldent have , i cut stripped the ht lead down and joined another one could that be causing it

 

allso how do i set up the carbb thanks,

 

try another ht lead mate see if any different

 

check your carb slide is closing properly and that your thorttle cable is adjusted properly..take the air filter off and see if the slide is resting on the idle screw a tenner says its not.