The #1 Upgrade You Need - Ninja 400/500 Race Bike | Undercut Transmission Install
🧢 Merch & Support https://www.etsy.com/shop/MotorsportHats Dealer →   / ng.cycles  Personal →   / nathan.gravelle  Second Channel →    / @gripsanity2  Race Series: CVMA Classes: Formula ULW / 500SS 🔧 Parts Used (Spears Racing) Ninja 400 Undercut Transmission https://spearsenterprises.com/product... Ninja 500 Undercut Micro-Polished Transmission https://spearsenterprises.com/product... Spears Aluminum Core Rubber-Bonded Gasket Set https://spearsenterprises.com/product... Transmission Shift Kit Upgrade (Highly Recommended) https://spearsenterprises.com/product... The #1 Upgrade You Need - Ninja 400/500 Race Bike | Undercut Transmission Install Is your Ninja 400 or 500 slipping out of gear or hitting "false neutrals" on track? In this video, I walk you through a full undercut transmission install, explaining why this is the most critical internal upgrade for any Kawasaki race bike. Don't let a gear slip cost you a podium (or a DNF). I’ll show you the step-by-step process, pro tips for engine disassembly, and the specific parts I used from Spears Racing to get this bike race-ready for CVMA. 🧠Why Undercut? Standard budget gearboxes (Ninja 400/500, R3) often push gears apart under heavy load. Undercutting modifies the engagement angle so the gears lock together under power. More positive, consistent shifts Eliminates gear slip/false neutrals Improved durability for racing conditions Mandatory for high-stakes competition It’s one of those upgrades you don’t see — but absolutely feel on track. 🤝 Supported By: NG Cycles | Blud Lubricants | KYT Helmets | Cardo Systems | Kawasaki Team Green ⏱️ Timestamps 00:00 Intro 03:00 Pro Tips 04:40 Disassembly 07:44 Engine Removal 09:45 Engine Tear Down 14:44 Damage (Shift Fork & Gear) 15:35 Unboxing Undercut Transmission 20:15 Transmission Install / Engine Assembly 31:23 Engine Install 35:55 Troubleshooting: Fixing shifting Issue 38:04 Testing Transmission 39:11 Post-Race Results: Did it work? #Ninja400 #Ninja500 #CVMARacing #MotorcycleMaintenance #RaceBikeBuild #SpearsRacing #GripSanity #UndercutTransmission #KawasakiNinja #TrackBike #ClubRacing #EngineBuilding #MotoMechanic #DIYGarage #SportbikeLife
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