Finding an original air filter for an old model Honda Activa can be challenging but is possible. Check authorized Honda dealerships first, as they are most likely to have genuine parts or be able to order them. Reputable online retailers specializing in two-wheeler parts are another good option, but carefully verify seller ratings to ensure authenticity. Local auto parts stores focusing on scooters might stock them or suggest compatible aftermarket options from well-known brands. You can also search online classifieds, but exercise caution due to the risk of counterfeits. Ensure you have the correct Honda part number for your specific model year, and look for Honda branding on the packaging and filter itself to confirm its originality. Be prepared that the part may be discontinued, in which case a high quality aftermarket replacement will be the best option.

Sourcing an original bore kit for an old model Honda Activa will be more difficult than an aftermarket one, but still possible. Your primary target should be authorized Honda dealerships, particularly those with a long history or a good reputation for parts service. They can check their inventory and potentially their network for old stock or NOS (New Old Stock) parts. Online retailers specializing in genuine Honda parts are also worth investigating. You'll need your Activa's exact model and year to ensure you're getting the precise kit. It's crucial to verify the authenticity of any "original" part you find online, as counterfeits exist. Be prepared for the possibility that the original bore kit may be discontinued; in that case, a high-quality aftermarket option, designed specifically for your model, from a reputable manufacturer would be a suitable alternative, and you may need to consult with a trusted mechanic specializing in older scooters to determine the best course of action.

Using Castrol engine oil in an old model Honda Activa is perfectly fine, as long as you choose the correct type and viscosity grade recommended for your scooter. Castrol is a reputable brand and offers a range of oils suitable for scooters. You'll want to consult your Activa's owner's manual to find the manufacturer's recommended oil specifications, typically a 10W-30 or 10W-40 JASO MB oil for scooters. Once you know the correct specifications, you can easily find a suitable Castrol engine oil at most automotive parts stores, online retailers, or even larger supermarkets. Castrol's popular options often include their "Power1" or "Activ" lines, with formulations designed for scooters that meet the JASO MB specification. Just ensure the oil you select matches the recommended grade and specifications for your specific Activa model year to ensure optimal performance and engine protection. Most likely it would be Castrol Activ 10w30.

Using Honda genuine engine oil in your old model Honda Activa is a great choice, as it's specifically formulated for Honda engines. You should be able to find it at authorized Honda dealerships and service centers. They will have the correct oil that meets the specifications recommended in your Activa's owner's manual. The specific type of Honda oil you need will likely be a 10W-30 or 10W-40 JASO MB designated for scooters, and it will typically be branded as "Honda 4-Stroke Motorcycle Oil" or something similar. While Honda genuine oil might be slightly more expensive than some aftermarket options, it provides assurance of quality and compatibility with your scooter's engine. You can also likely find Honda engine oil through online retailers specializing in genuine Honda parts, although availability might vary depending on your region.