AV&V™ Extreme Duty Valve Spring Kits for Yamaha
Manufactured from ultra clean high silicon Kobe alloy wire then micro shot peened and nitrided, these springs have been designed to be used with high performance cams and/or Steel conversion valves that replace Titanium valves.
When changing OEM titanium valves for AV&Vs Extreme Duty Stainless Steel Valves, you must also upgrade your springs for AV&Vs Extreme Duty Springs due to the need for higher pressure and toughness. To order Intake Springs only, choose kits VSKXXXX-i.
Yamaha YFZ450 (2004-2009)
| Part Number (VSK1110)Kit | TYPE | Max. Recommended Lift | Seat Pressure | Open Pressure (lbs@mm) | Coil Bing Height | O.D. | I.D. | Retainer | Lower Collar | Notes |
|---|---|---|---|---|---|---|---|---|---|---|
| VSK1317 | Intake and Exhaust | .380" | 38lbs @ 1.060" | 81lbs @ 0.680" | 0.625" | 0.756" | 0.560" | Use stock units | Use stock units | Steel valves |
| VSK1317-T | Intake and Exhaust | .380" | 32lbs @ 1.060" | 75lbs @ 0.680" | 0.625" | 0.756" | 0.560" | Use stock units | Use stock units | Titanium valves |
Note
- Complete kit for steel or titanium valves
- Valve shims available for the above.
Part number VSS1010-20 OD: .740” ID: .440” Thickness .020” (Package of 20 shims)
Yamaha Raptor and Grizzly 700 (2006-2012)
| Part Number (VSK1110)Kit | TYPE | Max. Recommended Lift | Seat Pressure | Open Pressure (lbs@mm) | Coil Bing Height | O.D. | I.D. | Retainer | Lower Collar | Notes |
|---|---|---|---|---|---|---|---|---|---|---|
| VSK1318 | Intake and Exhaust | .460" | 45lbs @ 1.450" | 195lbs @ 0.950" | 0.880" | 1.105" | 0.7420" | R1318 | LSC51 | Steel valves |
Note
- Complete kit for steel valves
- This kit comes with AV&Vs exclusive titanium top retainers and jumbo valve keepers.
- Valve shims available for the above.
Part number VSS1310-20 OD: 1.090” ID: .460” Thickness .020” (Package of 20 shims) - Maximum lift with AV&V™ Valves is .500″, otherwise it is .460″ with stock valves.