I have a 23 KAW 3 years old which is hard to start for the first itme each day. It normally takes about 10 - 15 minutes of multiple tries to start. After it warms up it will usually start within 15 - 20 seconds. It has been to the shop multiple times and they cannot find whats wrong (or too busy to spend the time). I have replaced the air filter, both coils, new carb, coil wiring harness, new plugs with no change. First start of the day I use a little starting fluid but that doesn't help too much. I get a lot of backfiring or popping through the carb. It appears to be flooding the carb but I can pull the plugs and they are pretty dry. If I put a new set of plugs in it everyday it tends to start a little better but still takes quite a bit of cranking. The plugs turn very black after a couple of days. PLEASE can anyone advise. Seems like the shops either can't fix it or don't want the challenge.