By all accounts, I have a 1979 Pantera 500cc motor. It's now in a golf cart, with the fuel tank above the motor and a Mikuni pulse pump feeding it. I'm not a 2 stroke pro, so I could really use some help with this issue.
- The good:
The motor starts immediately and idles very well. If I get in and go immediately after starting it, it goes like a champ. If I had to guess, I'd say it accelerates slower than expected, but it goes and goes pretty decent.
- The bad:
If it is left to idle for even a short while (less than a minute), there is no throttle response. You can hear the tone of the motor lower with the throttle wide open, but it doesn't rev a lot higher than idle, and it's inconsistent.
I cleaned the carb and it looks great. Everything moves freely and it is free of grime on the inside. I put a 4-7lb. fuel pump in place of the pulse pump to see if it wasn't getting enough fuel and that didn't change the behavior at all. I just ended up with fuel spitting out of the pulse pump nipple in the crank case and out of what I imagine is an overflow hole in the carb.
I don't know what a motor behaves like or sounds like when it's flooded, so I don't know if it's getting too much fuel or not enough. It has good compression, and there's definitely spark.
ANY help is appreciated. I'm at my wits end trying to figure it out.