SKU: 255436261573

Yamaha YZ85 Complete Engine Rebuild Kit – Stroker Crank + Big Bore Cylinder

Fits ALL Yamaha YZ85 models and years.

Kit Includes:

• BPR 52.50mm Cylinder

• Wiseco or Wossner Moly-Coated Race Piston

• Nitrite-Coated High-Temperature Piston Rings

• Chrome Wrist Pin and Circlips

• Hot Rods +2mm Stroker Crankshaft (assembled with rod)

• Crank Bearings

• Transmission Bearings

• Water Pump Bearing

• Clutch Arm Needle Bearing

• Complete Gasket Kit

• Crankcase Engine Oil Seal Kit

• Maxlock Head Stud Kit with Nuts

• Cylinder-to-Case Maxlock Allen Drive Studs

• Cylinder-to-Case Dowel Pins

• NGK Spark Plug

✅ All parts are 100% brand new
✅ Includes a 1-Year Limited Warranty (See warranty details below.)

Warranty Details:

• This kit is NOT DIY — installation and tuning must be done by a qualified, experienced mechanic.

• Stud Warranty: If a Maxlock stud fails during normal use (not during installation), we will replace the entire stud kit after inspection.

• Alpha Cub Cylinder Warranty: If the Alpha Cub cylinder fails and cannot be repaired, it will be replaced after inspection by Millennium Technologies.

• Important: Warranties do NOT cover failures due to improper installation, poor tuning, incorrect break-in, or misuse.

• Parts must be returned for inspection to qualify for any warranty replacement.

Take your Yamaha YZ85 to the next level with our most complete and reliable engine rebuild kit. Order today for unbeatable performance and durability!