Engine won't turn over. Has been sitting for

Low voltage at battery. The trickle charger failed to adequately keep battery charged. Failed charger, excesive parasitic drain, and/or other battery related failure.

Probably starter or a discharged battery. Try charging up the battery first. Anyone with a voltmeter could check the battery condition. If it is at 12.2 volts or higher, it should turn the engine over at normal starting speed. If under 12 volts, it is discharged and maybe too low to crank the engine over.
If your battery is at full charge, you probably need to pull the starter off and have it tested for free at any parts store.

Have you checked the charging output from your alternator? With the engine running, you should get about 14 volts across the battery terminals. If the battery is good, after a charge you should get a reading of around 12.7 to 13.2 volts. If the voltage is less, especially with the motor running, you may have a charging problem due to rectifier bank failure or battery breakdown due to "overcharging" if the reading is above 14 volts. [This is also a rec' fault]. My assumptions are that this batt' goes flat when run on the bike after a full charge. I hope this helps a bit.

try your battery first most of the time thats the problem when you turn on your engine you should have lights if you dont then your battery is dead and that is the problem would reccomend you either charge the battery if that dosent work replace it but check first if lights are working a 6 month lie up would deaden your battery best of luck also any battery charger would do for the charge and also on a short term you can jump it from a car battery with the leads just to make sure its the battery also but do not try and charge from the car just check to make sure its the battery by doing this

fixya is a site that you can ask any question you want. most questions are free. the more technical the question the further up the ladder of experts ready to assist. fixya offers phone support,not always free.you can chat live online with an expert if you choose to do so. fixya does not come to your home to repair your problems but fixya does offer a top line of experts in many feilds of technical assistance for the do it your self mechanics. your problem sounds to me like a simple bad or overcharged battery. they do go bad. the best way to keep a battery charges is to run the vehicle at least once a week. trickle charge may have shorted your battery out. i suggest you try to do traditional boost from another vehicle or take battery to autozone,advance auto parts,they offer frre testing and charging of batterys. thank you for choosing fixya.com

Hi, Do you have an alarm & Immobiliser fitted on your bike as these drain the battery on your bike very quickly? If so i would recommend removing your battery and fully charging it with a decent amp-age charger. If you have your garage attached to your house then i would definitely recommend purchasing a trickle charger and when not using your bike keep this plugged into the mains and you should not have this problem again. all motorbike shops sell these chargers If after this the battery goes flat again i would suggest purchasing a new battery. This is a common fault as most motorbikes sit in the garage through the winter months and if not kept on charge will deteriorate. Hope this helps.

A battery that might sit for a month at a time, would only need a trickle charge or about 1 amp, a charger of this type can stay hooked to the battery for the whole month. A 10 amp would be for a quick charge or only about 4 - 12 hours depends on how fast the battery lost the charge. A 10 amp charge would cook the battery if left for days.

your car will always have something being powered but its a trickle amount[computer-entry control[keyless entry]-radio memory-etc if ur going to let it sit for a month with battery connected yes your battery will more than likely be dead when u disconnect it ur also clearing all codes and memory in computer and components auto stores sell a trickle charger/maintain charge charger for long term storage there used for any type battery boats ,cars,atvs ,planes,etc the charger maintains the charge in a battery it goes on and off when needed

they make a charger called a battery tender which keeps your battery topped at all times with a trickle charge. get one and your batteries won;t die.

A new motorcycle battery will not sit for 18 mos and still work unless it has been on a trickle charger all that time...Do yourself a favor and spring 4 a new batt....the one u have wo'nt charge...believe me....good Luck to you friend....Tim