Renewing O-rings, when they have to be removed and replaced, will make doubly sure the seal is maintained. The old one may seem O.K, but heat and pressure after tightening, will make them brittle and hard.
To help you order the correct quantity and type of seals, gaskets and other consumables, why not check our online schematic, or if your machine is not supported this way, simply browse the Product Gallery; which will list everything you need for a successful overhaul.
Other O-rings you may wish to consider:
Don't take any chances insist on only genuine Honda OIL SEALS, O-RINGS and GASKETS. Our pro-workshop gasket sealant: 08C70K0234M to complete the job like a professional!