Post by dummy on Feb 28, 2022 18:52:58 GMT -6
I recently bought a Chinese 200cc Dongfang scooter. From the get go it was very hard starting and wouldn't idle until the engine warmed up. So, I replaced that cheap carburetor, with a performance CVK 30mm carburetor. Now it starts right up and idles perfect. However, I removed the Pair system EGR and plugged up all the vacuum lines. Now at full throttle it started to sputter and backfire. So I adjusted the fuel mixture to allow more fuel into the carb. Well the backfire stopped but the engine hiccups at full throttle. I adjusted my valves to.004 on both the intake and exhaust. Just wonder if my fuel flow is just too slow since I have installed a regular shut off valve and got rid of the Petcock. HELP