That balancer is made by ProSport. It's made in Australia and meet SFI 18 specs. There isn't one made directly for the inliners, (no V-belt pulley groove) but I'm modifying my belt setup anyway!
My machinist ran mine up pretty high on his high speed rig and he says it's well balanced and very true.
They're available on Evil-bay. Be sure to specify the SFI approved units. They make a cheaper one but it's not SFI rated!! I think they're available from Speedway as well.
