Intermittent Rough Running WR400
Posted June 26, 2003 - 05:26 PM
During the last couple of Enduros, I have noticed that occasionally the engine runs very roughly, Backfiring on deceleration, Severe bogging when the throttle is opened, only under load though. It's fine when revving in neutral.
It feels a little like it has water in the Filter, but that is OK.
It usually clears after a couple of Kms, and is fine.
One time it did it immediately after a big G-Out.
I have drained the carb, no change.
New Plug, no change.
Feels very rich, and then clears itself, and is fine for another hour or so.
I have wondered about the Filter screen getting blocked, but seems unlikely.
It occurs more often just after starting the engine. Even when warm.
I thought possibly the accelerator pump was not working correctly, but that would make it lean, not feel rich, am I right on that?
Will pull the carb this weekend, and check everything.
Another thing, this is a Euro model in New Zealand, and it came without all the restrictors-grey wire etc that the US models seem to have. Also the accelerator Pump squirt has from new only had approx 0.25 sec duration.
This bike runs really strong (except for this intermittent problem)
Anybody who can offer some advise would be appreciated.
Posted June 27, 2003 - 04:03 PM
Posted June 29, 2003 - 11:43 AM