replaced my entire fuel system including a new carb. starts and idles fine, but as you raise the rpms, it starts to sputter and bog down until it stalls. i'm at a loss as to what my problem could be. any help as appreciated

 

If your new carb was Chinese it could need cleaning out and will need setting up, may even need different jets. Other possibility a rev limiter coming in early, either due to CDI getting a wrong signal saying you are in reverse, or faulty CDI. This is unlikely to cut the engine altogether though.

One thing to try before anything is a new plug, even if the one that is in was new before the fault started.

 

i just replaced my plug and CDI. if i feather the throttle and get into higher RPM's, when i let off the gas, it will backfire