| Genuine Yamaha Yz450f Wr450f Yz426f Wr400f Yz400f Water Pump Shaft | | $104.52 | $37.56 | | US | <1m |
| Wiseco 4650M09200 Forged 13.5:1 Piston 92Mm Std Bore Yamaha Yz400f Wr400f 4650Ps | | $295.67 | $30.83 | | US | 3m |
| Fits 2000 Yamaha Wr400f Ultralite Steel Rear Sprocket Pro X 3903501 Most Orders Ship Same Business Day | | $75.35 | $39.05 | | US | 12m |
| Fits 1999 Yamaha Wr400f Ultralite Steel Rear Sprocket Pro X 0362501 Most Orders Ship Same Business Day | | $75.35 | $39.05 | | US | 12m |
| Fits 1999 Yamaha Wr400f Swing Arm Bearing Kit 8663501 Most Orders Ship Same Business Day | | $117.58 | $32.13 | | US | 15m |
| Fits 1998 Yamaha Wr400f Aluminum Rear Sprocket Pro X 7974501 Most Orders Ship Same Business Day | | $97.97 | $31.56 | | US | 18m |
| Prox Piston Kit Yz400f '98-99 + Wr400f '98-00 12.5:1 | | $330.33 | $44.23 | | US | 19m |
| Fits 1999 Yamaha Wr400f Shock Bearing Kit 5806501 Eliminates play, includes bearings and seals | | $91.94 | $26.19 | | US | 21m |
| Fits 2000 Yamaha Wr400f Aluminum Rear Sprocket Pro X 3985501 Most Orders Ship Same Business Day | | $97.97 | $31.56 | | US | 21m |
| Namura Top End Gasket Kit For Yamaha Wr400f Yz426f & Wr426f Nx-40041T Fast Ship | | $74.38 | $25.67 | | US | 23m |
| Fits 1999 Yamaha Wr400f Swing Arm Linkage Bearing Seal Kit 6886501 Most Orders Ship Same Business Day | | $135.68 | $32.66 | | US | 24m |
| Fits 1998 Yamaha Wr400f Aluminum Rear Sprocket Pro X 1797501 Most Orders Ship Same Business Day | | $97.97 | $31.56 | | US | 29m |
| Fits 2000 Yamaha Wr400f Shock Bearing Kit 1778501 Eliminates play, includes bearings and seals | | $87.41 | $26.05 | | US | 29m |
| Moose Complete Gasket Kit Yamaha Wr400f, Yz400f - [M808675] Same Day Ship - eBay Prime! | | $135.68 | $32.66 | | US | 36m |
| Moose Complete Gasket Kit Yamaha Wr400f, Yz400f - [M808676] Same Day Ship - eBay Prime! | | $135.68 | $32.66 | | US | 36m |
| Fits 2000 Yamaha Wr400f Aluminum Rear Sprocket Pro X 6641601 Most Orders Ship Same Business Day | | $97.97 | $31.56 | | US | 38m |
| Fits 2000 Yamaha Wr400f Piston Kit 2601601 Most Orders Ship Same Business Day | | $286.49 | $37.11 | | US | 38m |
| Fits 1998 Yamaha Wr400f Shock Bearing Kit 8861601 Eliminates play, includes bearings and seals | | $81.38 | $25.87 | | US | 41m |
| Fits 1999 Yamaha Wr400f Piston Kit 5103601 Most Orders Ship Same Business Day | | $286.49 | $37.11 | | US | 43m |
| Fits 1998 Yamaha Wr400f Piston Kit 6234601 Most Orders Ship Same Business Day | | $286.49 | $37.11 | | US | 46m |