In a message dated 96-05-02 10:40:41 EDT, miller@spk.hp.com (Brian M. Miller)
writes:

>
>I just recently faced the same problem and, near as I can tell, you are out
>of
>luck.  The battery box is VERY small, only 7" tall.  The ONLY battery which
>will fit under the front seat is a group 42, which is NOT available as a 
>deep cycle; only as a conventional starter battery.  
>
>I posted a query on this list asking if anyone knew where to get a deep
cycle
>battery which would fit and got no responses.  The only "fix" is to get out
>the old cutting torch and deepen the battery box.  For the moment, I just
>gave
>up and purchased a "conventional" group 42 battery.  If all goes well with
my
>'80 Westy (a recent acquisition) maybe next year I will perform the required
>surgery.
>
>

Actually,  agroup 41 is larger than a 42 and it will fit under the seat.
 Depending on how often it is drained down, will last about 2 years.  For the
extra capacityof a larger battery, I don ot think it is worth the effort.
 Remember that if you do modify the compartment for a larger battery, you
need to secure it in the box in case of rollover or something.
Dennis.