Re: gts bolt head sizes

[RSRBOB]

Yamaha's in general use 8, 10, 12, 14, 17 for bolt head sizes. This of course
is fasteners up to 12 mm bolt size. In stock config, they do not use any head
sizes between what I listed here. Gear wrenches are great, cheap and come in
a stubby length and a longer version. Extremely handy and seem to be rather
durable too. Many tool trucks are selling them now as are some auto parts
stores and Sears.
RSRBOB