Changed battery because it ran down last year. Had it on battery charger [Battery Tender] all winter. Will take a jump ,run but won't start again . Something is draining the battery . I checked all connectors .

Its possible the charger is telling you the battery is too dead for the charger to work. A safety feature to keep from burning up the charger.
I'm not aware of any fuses between the jumping post and the battery. You may have a short in the car that is draining power.

check the voltage at the motors with a multimeter and see if 12volts are being sent there

taking the seat of a vmax is really easy. open the seat like your gonna full the gas tank, on both sides is a plastic piece coming from the seat. on nut on each side comes out and the seat lifts back and up. if your talking about just starting with a battery cable you can just reach the battery cables with the seat off. if your talking about jump starting by forward motioin and using the clutch its best to find a hill and get it going and put the bike in 2nd gear and let the clutch out. WARNING. If the bike don`t start you probably won`t be able to push it up hills, it weighs 650 lbs. but you can not jump start the bike without taking off the seat. suggestion, buy a battery tender terminal hookup for $5 and screw the two wires onto your batter and let if hang out the side of the seat, it has a cap over to keep it dry in the rain and if you buy a battery tender you will be able to jump the bike or charge the battery without taking of the seat every time. the battery tender cost from $20 to $40 it s worth the money. if your not going to ride you bike in the winter hook up the battery tender and leave the battery out of the bike for the winter in a garage or basement hooked to the battery tender. cost pennys a month and save the battery life.
hope this helps

How long is the bike setting between when you park it and when you try to start it again? When you get ready to ride it, did you put a battery charger on it and bring the battery to a full charge?

When thinking it's getting to be time to ride, I recommend charging the battery with a charger disigned for ATV'S/motorcycles. When the battery is fully charged, take the charger off and test the battery with a load tester. If it passes the load test, attempt to start the bike. If it starts, and there is no further problems, Enjoy the ride till you park it long term again. I might suggest putting a battery tender and very slow trickle chat=rge on during storage

Hope this helps you

sounds like the alternator is not charging the battery. and/or the battery has a short in the plates

The best place to store a battery is in the back of your refrigerator, but you don't want to do that.Your battery will hibernate in the cold, but will age in the warmth. Your car battery is outside all winter and it does not freeze. I put my batteries in a tray, fully charge them and leave them in the garage, topping them up one or twice during the winter and once before installation in the spring. If a battery freezes I would have had to replace it anyway it would not have been good for the season anyway. Put your battery on a different charger and have your battery load tested at a shop. You either have a defective battery, or a defective battery tender, or both. At any rate warm storage for batteries is bad, cool or cold is better for longevity.

install a battery tender this will mantain the voltage in the battery these work great and will not harm battery or car

www.batterytender.com

try cleaning the battery terminals, check the battery voltage when you hit the starter, If you run it too long and it isnt charging a good battery you can damage the regulator again, same if you jump it off a car battery, it can cause damage

you need to get a battery tender, and when you put your new battery in it has connections that will stay on your battery and you just plug it in after you are done riding and cleaning her. oh one more thing when you get a new battery you need to charge it for 8 to 12 hours before using it, they are not like a car battery buy it, put it in, and go, you have to charge them up first. The tender should keep you battery charge all winter long. I hope this helps you. One more thing, 749's do not like weak batteries as you have found out. Buy a new one, install a tender and and use it, the battery will last much longer.

and found this Battery Tender. http://batterytender.com Look likes the solution. Anyone know these? which model do I need? Also I saw this ad: Cigarette-Adapter http://www.amazon.com/Deltran-Batter...=pd_sim_auto_3 Does it mean I can charge through the 12 v cigarette socket? BatteryTender Jr. is all you should need.....they work great.....I plug mine in whenever the bike of scoot is not being used......batteries last a lot longer and good starts all the time,