Great site. Have a few questions and hope this is the right area to post in as I am new to this.
I started having carb problems with the Mikuni about 3 months ago so I purchased and installed the Weber kit about 3 months ago and all was great until about a week ago when I started to get a backfire thru the carb under load. I hadn't installed an electric pump when I did the install so I did that last weekend but my problems continue. New cap, rotor, and plugs. Timing is spot on and compression is good at around 150 on all 4. Any suggestions would be greatly appreciated! I have the G63B with 235,000 on her. No leaks and no smoke.