O-rings, U-rings and plugs
Mikuni and Keihin
| MIKUNI O-Ring description |
Size inside diameter (mm) & thickness | Mikuni reference | Order number |
| 1.80mm I.D. x 1.15 mm | N124.063 | 007-163 | |
| 2.4mm I.D. x 1.6mm | 18-4636 | ||
| Pilot Air Screw | 2.70mm I.D. x 1.13 mm | N133.037 | 002-858 |
| 3.7mm I.D. x 1.8 mm | 18-4634 | ||
| N208.099 jet | 4.0mm I.D. x 1.2 mm | 616-12001 | 007-790 |
| 4.8mm I.D. x 1.9mm | 18-4635 | ||
| Fuel Joint | 6.25mm I.D. x 1.83 mm | 616-23002 | 007-182 |
| 6.6mm I.D. x 1.5mm | 18-4638 | ||
| Needle Valve | 6.70mm I.D. x 1.35 mm | VM24/559 | 002-838 |
| Fuel Joint & Needle Vlv. | 7.5mm I.D. x 1.53 mm | KV/10 | 002-709 |
| BSR-36 Float needle valve seat | 7.5mm I.D. x 1.53 mm | KV/10 | 002-709 |
| Needle Valve | 8.47mm I.D. x 1.53 mm | 616-33003 | 007-470 |
| Starter Plunger | 8.50mm I.D. x 1.55 mm | VM18/249 | 002-672 |
| 19.60mm I.D. x 2.43 mm | VM26/227 | 002-825 | |
| Air box seal | 66mm I.D. x 5.3 mm | 007-454 | |
| 40 mm I.D. x 2.6 mm | 18-4610 | ||
| Keihin O-Ring description |
Size inside diameter (mm) & thickness | Keihin reference | Order number |
| 2.65mm I.D. x 1.90 mm | 0901-006-6000 | 018-722 | |
| Pilot Screw | 2.8mm I.D. x 1.3mm | 18-4617 | |
| 2.8mm I.D. x 1.9 mm | 18-4601 | ||
| 3.2mm I.D. x 1.1mm | 18-4604 | ||
| U-Ring | 3.55mm I.D. x 1.95 mm | W9353-36000 | 021-067 |
| Accelerator Pump | 4.0mm I.D. x 1.05 mm | W9353-11042 | 021-070 |
| 4.2mm I.D. x 1.1mm | 18-4609 | ||
| 4.47mm I.D. x 1.78mm | 18-4603 | ||
| 4.8mm I.D. x 1.9mm | 18-4624 | ||
| 5.0mm I.D. x 1.3mm | 18-4613 | ||
| U-Ring | 6.35mm I.D. x 2.95 mm | W9353-6500 | 021-097 |
| 7.90mm I.D. x 1.40 mm | 16075-MB0-0030 | 018-694 | |
| Choke O-Ring | 8.95mm I.D. x 1.35 mm | 0901-069-6000 | 021-527 |
| M1 Needle Seat | 9.10mm I.D. x 1.30mm | 16958-397-7710 | 021-047 |
| 11.75mm I.D. x 1.94 mm | 16978-ZB9-0050 | 021-732 | |
| 18.60mm I.D. x 2.4mm | 18-4641 | ||
| 38mm I.D. x 2 mm | 0901-012-6000 | 018-601 | |
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| U-Ring description | Size inside diameter (mm) & thickness | Keihin reference | Order number |
| Oval shape | 18-4642 | ||
| 3 x 5.2 x 2mm | 18-4643 | ||
| 4 x 6.3 x 2mm | 18-4644 | ||
| 6.5 x 9.5 x 3mm | 18-4645 | ||
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| Carb passage rubber plug | Manufacturer part number | Order number | |
| Honda 16010-371-004 | 18-4688 | ||
| Honda 16010-425-671 16010-461-781 16010-469-004 |
18-4690 | ||
| Kawasaki 92068-006 | 11-4972 | ||