Originally Posted by poncec23

this should be a simple one to fix
First check to make sure that the carb doesnt close all the way when you apply the breaks. if it does adjust the idle screw in untill the carb is cracked ope about 1 mm. it sounds like you did one way to tell is if the idle is properly adjusted the car will remain stationary and idle well without breaks

second insure your idle is not too high. if it is unscrew the idle screw till it is properly adjusted see solution one

third the clutch is most likely the problem if the first two didnot solve it and this will involve some know how and please use your instructions as i can only use past problems to help you. you can do this with the engine in the car but it will be easer to do it out of the car.
1. remove the engine from the car, remember to dis connect the pipe, fuel line, and linkages
2, remove clutch bell and inspect the inside for melted clutch, debris, and damage. CHECK THE CLUTCH BEARINGS, if they are seized or burnt they must be replaced!!! if the clutch bell is damaged replace, if not use light sandpaper, emery cloth, or steel wool to remove melted clutch particals. untill the inside is clean and looks new.
3. inspect the clutch, check for extreame wear, broken shoes, broken springs. if nothing is broken apon removal check for debris that held the clutch open. if not clean the springs with break or electric motor cleaner. next clean the shoes, by using the sand paper or emery paper ot bring the face of the clutch back to a like new appearance and also dont forget the moving surface for burrs, if so remove with sand paper.
4. place shoes back on fly wheel and check for free movement. if you are good to go replace all things you took apart in reverse order.
also besure to take note of shim placement and gear mesh on setup.
hope this helps and let me know
chris