homebuilt electric motorcycle help
 

im building a "low-buck" EV motorcycle i have stumbled across 9 each of the following batteries Power Patrol sla0925 6 volt 7 AH, interstate pc670 6 volt 7.2 AH would these be of any use to me ? range ?

you have less than 1 90ah 12v trolling batteries worth of energy there. Good for experimenting, but you cant expect much range from them.

Those batteries are small enough that they might work for an electric bicycle but not for an electric motorcycle.
I would go for at least 100 amp hour batteries, otherwise you are going to discharge them so fast that they are either going to be damaged or at the very least you are going to have reduced range.