O-ring to seal the starter motor to the left engine case
Part number: 0928024003
USD $1.50
Compare to a typical dealer price of USD $6.76 each.
Low $2.50 USA shipping and $4.00 International shipping on typical DR350 orders!
O-ring to seal the starter motor to the left engine case
Quick reference code: OR-15
O-ring to seal the starter motor to the left engine case (SPN# 09280-24003). One is required for electric start models. Sold each.

Photo courtesy of Gregory Bender.