Adapter: Bales Technical Service Oil Filter Adaptor
Recommended by: Motorcycle Oil Filter Comparison
From that site:
"I get a lot of emails from Suzuki owners asking me what the secret best filter is. They're all trash. All of them. You are forced by Suzuki's brain-damaged specification to buy and use trash oil filters. There's now an alternative, you can buy an adaptor for $15 that allows you to use PL14610 or Supertech ST7317 filters, the same thing used by Honda, Yamaha and Kawasaki bikers."
Any experience / thoughts?