Join Date: Feb 2014
Location: South australia or in the middle of the australian desert...
weird eiger fuel problem...
Hey all, got a weird problem with a friends 400 eiger.
It happened all of a sudden after it was left in the shed for a week, the bike is used as a spay vehicle for grapes so it kind of needs to get back to good running order soon.
The problem is that is appears to be running very rich.. its hard to start and will only start when full throttle is applied and it still takes a while.
The weird part is that when running the engine with the fuel tank removed and with only the fuel in the fuel bowl it runs like brand new.
I have checked the petcock (fuel valve) and that appears to be working correctly ie. fuel only allowed threw the valve when a vacuum signal is present. apart from when valve set to "pri" I assume that setting is for priming the fuel system??? i could be wrong tho.
I have removed the carby and cleaned all fuel passages and checked all jets, the float level and all gaskets and o'rings for good seal. Ive got nothing wrong with the carby.
The other thing i noticed when pulling stuff apart was that there was a lot of fuel in the air filter box. I'm unsure if the fuel found its way there while i was checking the fuel valve or if its a symptom of the problem.
Any help would be awesome, i'm a engine tuner, engine builder and light vehicle mechanic by trade so 'im not confused by engines and the surrounding systems, but my experience and knowledge of small single cylinder engines is obviously lacking.
cheers Sam form Australia.