All Wiseco Rings Can Be Used in Cast Iron, Nickel Ceramic Platings (Nikasil), Boron Composite, and Electrofusion Bores. CAUTION: Unless Otherwise Noted, Wiseco Rings Can NOT Be Used in Chrome Plated Bores. Engine Damage Will Occur.

Only to Be Used With Wiseco Pistons
Set Is for One Piston Only
Amount and Type of Rings Included Is Dependent on Your Specific Application, and May Not Match What Is Shown in the Image. Do Not Purchase Based on Image Alone
Bore Size (In Mm): 73.5
Top Ring Thickness (In Mm): 1
2nd Ring Thickness (In Mm): 1.2
Oil Ring Thickness (In Mm): 2.8

Only Fits Models Listed With One of the Following Wiseco Pistons Installed (P/N Located on Piston):4066M07350, 4689M07350, 4466M07350

Honda Fitment:XR250R 1986-2004
XR250L 1991-1996

Yamaha Fitment:TT-R250 1999-2006
Includes 2 Piston Rings and 1 Oil Ring