WOSSNER SINGLE RING PISTON KIT YZ125 1998-2001, WR125 1998-2001 PART 8091D100 MC350-F Notice how the stock cover

Notice how the stock cover does nothing to protect the clutch system Nihilo has fixed this problem with a tough Billet cover

Airfoil shape added to cage tip to increase air velocity from outer ports

bearing journals and other critical areas at temperatures much higher than other lubricants

Piston crown shape                     Dome

Use in combination with VHM head AA33080

WOSSNER SINGLE RING PISTON KIT YZ125 1998-2001, WR125 1998-2001 PART 8091D100 MC350-F Notice how the stock coverALL PISTON KITS INCLUDE PISTON, RINGS, WRIST PIN, AND RETAINING CLIPS UNLESS NOTED. REPLACEMENT COMPONENTS LISTED BELOW ITEM BORE SIZE PISTON SIZE RING RING QTY NEEDED CLIP WRIST PIN SE BEARING 8091DA 54. 00 53. 95 RSB5400 1 CW15 WP032 N1043 8091DB 54. 01 53. 96 RSB5400 1 8091DC 54. 02 53. 97 RSB5400 1 8091D050 54. 50 54. 45 RSB5450 1 8091D100 55. 00 54. 95 RSB5500 1 8091D200 56. 00 55. 95 RSB5600 1