James Calandro wrote: > I have a 2006 Monster with 29,700 miles on it. I removed the tank for > my > normal winter storage so it will sit empty and shrink back to its > normal > shape. At that time I removed the battery and air box and checked the > valves and only adjusted one. When I put it back on the road it did > not > run correctly. Part and especially steady throttle have a lot of > surging. > Moderate to full throttle seems to work pretty well. A friend > suggested > having the fuel injectors cleaned. I have run enough car and fuel > injector cleaner through the motor it should be nice and clean. I > rode it > Monday and it is actually a little better but still not right. > > Yesterday I put it on the lift and started stripping it down. Well as > I > removed the air box I noticed the coil mounted to the let rear had one > of > the plug wires disconnected. That would be my fault because I did the > valves a while back I had to unplug them to remove the air box. It > has > not been running right since. Now it is a dual spark head and the > other > plug wire was fully seated. Could only having one spark plug working > cause > my symptoms? I am on the horns of a dilemma. I can put it all back > together and go for a ride and if it works I am done. If not then I > have > to spend all that time taking it apart again to remove the fuel > injectors. > Any thoughts? G'day Jim, I think you answered your question. Part throttle surging but full throttle ok running a dual plug head with one plug idle sounds like a recipe for what you have described. Which plug is down???? I would suggest that if your main plug is the dead one, you could get insufficient ignition of the intake charge at lower throttle settings caused by the second plug being in a less than ideal location in the chamber. It is probably worthwhile to give the injectors a look over while you have them exposed anyway if you have access to cheap service agents/mates with the gear and know how. Over here in Oz, they charge like scrub bulls for injector servicing/checks. As it is low miles and probably ridden shall we say, with enthusiasm, as I expect you do then it would be viable to just button it up and go with the ignition firing on both plugs. Pretty certain it is the inefficient combustion due to one plug that is the issue. Regards, RAD