29th Aug 2011, 09:51

It sounds like you may have an air leak somewhere. First check to see if the carbs are seated properly to the rubber boots. If that's good, check for cracks in the boots, and if that's OK, maybe the gasket between the boots and head are leaking. It should be fairly easy in either case to fix.

6th Feb 2013, 22:24

You want to check for air tubes on each side of the carb. Also you could have a hole or crack in the intakes. Otherwise your choke assembly could have issues.

My XJ750 is hard to start in the cold, or if it sits for more than a week unless it's above 70 degrees.

2nd Jun 2016, 21:45

Mine was doing the same thing; it was the that carb clamp on the boot nearest the throttle linkage. The throttle linkage was hanging up on it sometimes. I just loosened the clamp and turned it a little and that fixed it.