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2007 Suzuki LT-R 450 Won't Fire Up!!


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If the battery isn't fully charged, the FI won't operate. The motor will crank, but it will not fire. I would start there, put the battery on a charger to make sure it is 100% charged and then try. I was told the battery needed to be put on a tender once a month to keep in in top shape to avoid that problem. I haven't done, it, nor have I had any problems, but I do know that the FI needs a certain amount of voltage to operate. You also might check your kill switch and attatched wiring, make sure all the ignition components are plugged in tight. The motor will still crank if the ignition is off. Good luck, I know how much of a pain it is to take the tank off.

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Have the battery load tested, it is free at most auto parts stores or repair shops. As far as an easy way to get to the plug, there is none, you need to take the tank off, it literally sits right on top of the plug. There are instructions on how to remove the tank in the owners manual. It is a pain, but after you have done it a few times, it becomes routine. Since it sounds like you have never been in there, you will want to pop the vavle cover off and check the valves while you have the tank off. If the valves are too tight, that could be causing your starting problem too. That usually is a progressive issue, the machine becomes hard to start before it stops starting completely, but I wouldn't rule it out. Either way, I'm sure it is time to check your valves anyway. Better safe than sorry.

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