Re: Idle Mixture Screw Factory Setting
The idle needles on my XJ650 were factory set at: 3 7/8, 3 3/8, 1 3/8 and 2 3/8 turns - all over the place. One wonders how four identically engineered cylinders and carburetors can run well with such an idle mixture variation. Supposedly, they were set with a sniffer in each pipe at the factory, since each head pipe has a smog bung in it. Problem is that they can only set the smog on a zero-mile engine when they do this. They have only to show that it met smog regs when it went out the door. Apparently, they expected the dealer to clean it up if the customer complained about it. However, the EX has no smog bungs in the head pipes, so I really wonder what their reasoning was.
I finally figured out why I like Ducatis: With their exhaust note and dry clutch, they sound almost like a Guzzi!