IMS Fuel Tank / WR400F Carb issue
Posted April 07, 2003 - 03:48 AM
Just for the hell of it I decided to blow through the lines and listen for air escaping from the lines in the air box....The lines were clear....I then re-routed the lines back between the swing arm, and attempted to re-light the beast.....Dammit it fired up and I rode the hell out of it for the 10 miles back to the trailer with no problems..... WHAT IN THE HECK IS UP WITH THAT......
It appears that the damn thing vapor locked, I have never seen a Yamaha do that before.... This is the second time in the last three rides that the WR has done this....The last time was at another location, I got fed up and took the bike to the wash rack, once all the mud was removed the damn thing ran like a raped ape.......
Any Thoughts ?
Posted April 07, 2003 - 04:26 AM
Posted April 07, 2003 - 04:31 AM
This evening I'm going to replace the last two hoses on the carb (All will be new then. I'll also drop the bowl and make sure I don't have a piece of trash floating around and intermittently blocking a jet.
Posted April 09, 2003 - 12:44 PM
Posted April 09, 2003 - 01:51 PM
Turned out my decompresion actuator cable was over stretched in the frame loom by the oversized tank and opened the exhaust valve only on left turns. Could your unit be doing this too ?
Does the bike lock the rear wheel in gear when it dies ? Or does it run on ? Try flicking the decompression lever at speed when it dies. This, by accident, is how I figured out the problem on the 98'. Just for grins, pull the tank and inspect that cable and lever for play and/or blockage.