2007 K12GT Running rough

This started a little before Christmas last year and have just now got around to looking at it more in depth. I changed the battery with a fresh Odyssey just the other day and she started right up! Then I hopped on and took a spring ride only to have a huge loss of power and then a lower note coming from the engine…? No codes on the 911 …..I’m thinking maybe plugs or fuel pump issue? Any ideas ??


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Water in gas?

Clogged injectors?

Clogged fuel filter?

How many miles on the bike, when was it last fully serviced and to what extent? Is the bike up to date on recalls and bulletins, especially WRT the fuel pump recall that may apply to this bike and the cam chain jump guard campaign?

For a bike that’s been sitting, water in fuel or degraded fuel, and clogged or sticky injectors are possible. Fresh gas and a dose of red HEET would help with water, and a dose of SeaFoam or BG-44 should help with injector issues—but those are all dependent upon the bike being rideable enough to run through a couple tanks of fuel. No fuel filter to worry about on this model, but depending upon service history degraded sparkplugs or plug coils could be possible. Lastly, there were issues on the early wedge-k bikes with sticky valves or solenoids in the airbox, but IIRC that usually presented as an idle control problem, not a power loss while running.

Start with the easy stuff first, like fresh fuel and treatments, and see where that goes.

Best,
DeVern

120k on the bike…I think….All recalls were done and the bike has been running fine for the last 30k miles….it just occurred to me that at about 92k miles, the bike lost a coil and was running in three cylinders……that is what I’m experiencing now that I think back on it….and I’ll have to consult my paperwork, but I think only the offending coil pack was replaced. It might be a good time for new plugs and coil packs….needs to be done anyway….now to only find time to break it all down and get in there.


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