94-01 Yamaha YZ125 Top End Rebuild Full - REAL TIME | #yz125 #yamaha #fixyourdirtbike

This is how to perform a Yamaha YZ125 Top End Rebuild. For this service, you might not need a new piston, but you WILL need a new piston ring, wrist pin clips, and gasket set. Which you can buy here: New Piston Kit → https://amzn.to/3KXHY1w (Check Your Size) Piston Ring → https://amzn.to/47cDyLx Wrist Pin Clips → 93450-16068-00 Top End Gasket Set → https://amzn.to/4hlHG0D Point-to-Point Top End Service Video →    • 1994 - 2001 Yamaha YZ125 Top End Rebuild -...   Full Top End Service Video →    • 1994 - 2001 Yamaha YZ125 Top End Rebuild -...   Complete Walkthrough on FixYourDirtBike.com → Coming Soon! Top End Specifications Chart → https://bit.ly/3KXxQ95 Follow Me! Youtube    / @fixyourdirtbike   Instagram   / fixyourdirtbike   Facebook   / fixyourdirtbike   ---------------------------------------- The Tools You Will Need To Service Your Yamaha YZ125 Top End Rebuild: Foot-Pound Torque Wrench → https://amzn.to/3FVEdr3 Inch-Pound Torque Wrench → https://amzn.to/4j9LDpC Safety Glasses → https://bulltru.com Dremel with Sanding Disc → https://amzn.to/407t6l3 2-Stroke Oil → https://amzn.to/3WnyXSl Assembly Lube → https://amzn.to/4ar8mty Calipers → https://amzn.to/3BRoCXX Brake Cleaner → https://amzn.to/4jv9v7a Telescoping Bore Gauges → https://amzn.to/4g5reiE Feeler Gauge → https://amzn.to/4hd7qen Cylinder Brush → https://amzn.to/3W7Trhv Socket Extension 6mm Hex Socket 13/16” Box Wrench 8mm Socket 10mm Socket ¼” Socket Wrench ⅜” Socket Wrench The Specialty Tools You Will Need Are: Motion Pro Torque Wrench Adapter → https://amzn.to/3IUQnSg Machinists Straight Edge → https://amzn.to/4g4fSM1 Leak Down Tester → https://bit.ly/leakdown ---------------------------------------- 1994 - 2001 Yamaha YZ125 - Top End - Service Steps: 1994 - 2001 Yamaha YZ125 - Top End - Service Steps: Individual Steps: – Removal – 1 - Cylinder Head Removal →    • 94-01 Yamaha YZ125 Cylinder Head REMOVAL |...   2 - Cylinder Removal →    • 1994 - 2001 Yamaha YZ125 Cylinder REMOVAL ...   3 - Piston Removal →    • 1994 - 2001 Yamaha YZ125 Piston REMOVAL | ...   4 - Exhaust Valve Removal →    • 1994 - 2001 Yamaha YZ125 Exhaust Valve REM...   – Inspection – 5 - Cylinder Head Inspection →    • 1994 - 2001 Yamaha YZ125 Cylinder Head INS...   6 - Cylinder Inspection →    • 1994 - 2001 Yamaha YZ125 Cylinder INSPECTI...   7 - Piston Inspection →    • 1994 - 2001 Yamaha YZ125 Piston INSPECTION...   – Install – 8 - Exhaust Valve Installation →    • 1994 - 2001 Yamaha YZ125 Exhaust Valve INS...   9 - Piston Installation →    • 1994 - 2001 Yamaha YZ125 Piston INSTALL | ...   10 - Cylinder Installation →    • 1994 - 2001 Yamaha YZ125 Cylinder INSTALL ...   11 - Cylinder Head Installation →    • 1994 - 2001 Yamaha YZ125 Cylinder Head INS...   – Governor – 12 - Exhaust Valve Governor →    • 1994 - 2001 Yamaha YZ125 Exhaust Valve Gov...   13 - Exhaust Valve Governor Installation →    • 1994 - 2001 Yamaha YZ125 Exhaust Valve Gov...   ---------------------------------------------------------------------------------------- 1994 - 2001 Yamaha YZ125 Top End Rebuild Torque Specifications: Cylinder Base Nuts: 21 ft-Lbs Cylinder Head Nuts 21 ft-Lbs Cylinder Head Hanger Nuts: 25 ft-Lbs Intake Manifold Mounting Bolts: 88 in-lbs Spark Plug: 15 ft-Lbs Power Valve - 1994 - 1995: /Operating Rod Screw: 44 in-lbs /Arm Screw: 44 in-lbs 1996 - 2001 /Operating Rod Screw: 35 in-lbs /Arm Screw: 35 in-lbs ---------------------------------------------------------------------------------------- 00:00 - Intro 00:58 - Service Prep 01:18 - Head Removal 06:56 - Cylinder Removal 10:23 - Piston Removal 11:20 - Exhaust Valve Removal 20:36 - Head Inspection 32:18 - Cylinder Inspection 1:04:10 - Piston Inspection 1:12:49 - Clearance Calculations 1:13:32 - Piston Prep 1::15:29 - Exhaust Valve Installation 1:22:52 - Piston Installation 1:26:27 - Cylinder Installation 1:31:29 - Head Installation 1:36:52 - Leak Down 1:39:09 - Exhaust Valve Governor 1:56:07 - Break-in ---------------------------------------------------------------------------------------- You Can Get All The Dirt Bike Parts And Tools You Need HERE! → https://amzn.to/3gM6L6Z Check Out My New Merch! → https://bit.ly/FYDBMerch #FixYourDirtBike ----------------------------------------------------------- Questions? Website: FixYourDirtBike.com Directory: FixYourDirtBike.com/Directory Facebook: FaceBook.com/FixYourDirtBike Forums: FixYourDirtBike.com/Forums Instagram:   / fixyourdirtbike   All media, unless otherwise specified, are the property of Mantle Media & Consulting, Inc., 2025. As an Amazon Associate, I earn from qualifying purchases.