so when i kick start my bike it wont start, but when i bump start it runs fine. any suggestions? tried the carb 3 times, and checked the valves. and the cdi works, we tried it on another bike.
One thing to check, the play in the throttle. If the throttle cable is tight, it might be pouring gas into the carb. It would start under bumping but not kicking.
Clean the carb, adjust the valves, and put a new plug in it. When the CRF valves start to go, they will go really, really fast and hard starting is a typical symptom. When they go, the intake valves tighten up and it's not uncommon to see the gap go to zero in one ride. You can adjust then and get it to run but once the coating is worn off you'll need to do a valve job very soon.