Moved to the tech section.
The slower the charge the better... the only reason you would use a higher amp is for impatient people.
The question is... is it a automatic charger? If so the length of time shouldn't be a issue. Just plug it in, go to bed, take it off in the morning.
If not and its a manual charger...
How dead is the battery? Totally dead...
I would say run it for 4 hours, then take it off for 2 hrs then for 4 more hrs. I always can tell by how warm the battery is.
Why is it dead? Charging a F'ed battery or on a bike with a worn out charging system isn't going to help.
aka Gas Man
Was: 2002 Kaw ZX-9R
is me till the