AV&V™ Extreme Duty Valve Spring Kits for Honda
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.
Honda CRF250R (2004-2007) and CRF250X (2004-2012)
| Part Number Kit | TYPE | Max. Recommended Lift | Seat Pressure | Open Pressure (lbs@mm) | Coil Bing Height | O.D. | I.D. | Retainer | Lower Collar | Notes |
|---|---|---|---|---|---|---|---|---|---|---|
| VSK1006 | Intake | .380" | 38lbs @ 1.309" | 116lbs @ 0.929" | 0.870" | .760" | 0.514" | Use stock units | Use stock units | Intake Only Kit for Steel valves (VSK1006-i) |
| Exhaust | .401" | 43lbs @ 1.525" | 168lbs @ 1.124" | 1.045" | .780" | 0.510" | Use stock units | Use stock units |
Note
These kits come with lower collars (LSC1010) included
- Complete kit for steel valves
- Valve shims available for the above.
Part number VSS1010-20 OD: .740” ID: .440” Thickness: .020” (Package of 20 shims)
Honda CRF450R (2002-2008) and TRX450R (2006-2012)
| Part Number Kit | TYPE | Max. Recommended Lift | Seat Pressure | Open Pressure (lbs@mm) | Coil Bing Height | O.D. | I.D. | Retainer | Lower Collar | NOTE |
|---|---|---|---|---|---|---|---|---|---|---|
| VSK1015 | Intake | .435" | 51lbs @ 1.337" | 179lbs @ 0.902" | 0.850" | .934" | 0.650" | Use stock units | LSC1010 | Intake Only Kit for Steel valves (VSK1015-I) |
| Exhaust | .385" | 52lbs @ 1.416" | 179lbs @ 1.031" | .960" | .934" | 0.650" | Use stock units | LSC1010 | ||
| VSK1015-T | Intake | .435" | 42lbs @ 1.337" | 170lbs @ 0.902" | 0.850" | .934" | 0.650" | Use stock units | LSC1010 | Titanium valves |
| Exhaust | .385" | 52lbs @ 1.416" | 179lbs @ 1.031" | .960" | .934" | 0.650" | Use stock units | LSC1010 | Titanium valves |
Note
These kits come with lower collars (LSC1010) included
- Complete kit for steel or titanium valves
- Valve shims available for the above.
Part number VSS1010-20 OD: .930” ID: .478” Thickness .020” (Package of 20 shims)