I'd like to go about 70mph top speed, and 60mi range with an AC motor. The bike will be a KLR 650. I was thinking about many of these:

http://www.happy-trail.com/KLR650/KL...X14L5BS12.aspx

Is there a negitive side to Li batteries other then price? They seem the obvious choice for power, and weight.

Also is there any down side to having many smaller batteries, vs a few larger ones? The smaller ones seem like they would be easier to pack in on the bike.

Thanks for the thoughts, and advise.

-Cap