Did a little research on the twin Valley View 40cc that Scooter mentioned.
Looks like it might be a viable option.
VVRC 40cc twin
45.2oz with mufflers and ign module
7-7/8" or 8-1/2" wide depending on spark plugs used
4.7 hp
$395.00
DLE35cc single
40.83oz with muggler and ign module
no clearance issues
4.1hp
$349.00
BTW the cowl on the 30cc Ultimate is 9-1/2" wide as listed on the AW site.
If the horse power numbers are close to accurate the extra 4.37oz would not be a big issue. The $50 price difference seams like a bargain for a twin.
Please tell me if I am missing something.
David