# Motorcycle Service Interval Calculator > Works out when oil, filters, spark plug, chain, brakes and CVT belt are next due from current mileage and the last service, using general intervals. Service intervals depend on engine type, oil capacity and riding conditions. This calculator uses typical intervals from common manufacturer service schedules to show which job is due when. Important: these values are a general guide. The service schedule in your owner's manual always takes priority; for motorcycles under warranty, follow the intervals specified by the authorised service. ## How it is calculated For each item, next service = odometer when it was last done + interval. For items with a time limit, such as oil, brake fluid and coolant, months are added to the last service date; whichever comes first applies. With severe use selected (short city trips, hot and dusty conditions, a regular pillion or load, courier work), the km intervals of wear-sensitive items are shortened by 30%. An item is marked 'coming up' when less than 10% of its interval or fewer than 30 days remain, and 'due now' when it has been exceeded. You can also enter the odometer reading at which each item was last done. ### Formula - `Next service (km) = last done (km) + interval (km)` - `Severe-use interval = interval × 0.7 (rounded to 100 km)` - `Next service (date) = last service date + interval (months)` - `Status: remaining ≤ 0 → due now; remaining ≤ 10% of interval or ≤ 30 days → coming up` ## Worked example 1. 125 cc scooter at 12,500 km; last serviced at 10,000 km on 10 January 2026, every item done at that service, normal use 2. Engine oil: 10,000 + 3,000 = 13,000 km or 10 January 2027 → 500 km to go 3. Air filter: 10,000 + 12,000 = 22,000 km; spark plug: 10,000 + 8,000 = 18,000 km 4. Variator belt: 10,000 + 20,000 = 30,000 km; brake fluid: 10 January 2028 ## Good to know - Use the oil viscosity (e.g. 10W-40) and specification given in the manual: wet-clutch motorcycles need JASO MA/MA2, while some scooters specify JASO MB. - Clean and lube the chain after riding in the rain and after washing, without waiting for the interval. - Brake fluid (DOT 4) absorbs moisture and its boiling point drops, so replace it every 2 years even at low mileage. ## Frequently asked questions ### How often should motorcycle oil be changed? Small scooters and motorcycles typically every 3,000–4,000 km and large motorcycles every 6,000–10,000 km, and at least once a year. The exact value is in your owner's manual. ### When should a scooter drive belt be replaced? Typically every 15,000–25,000 km. Replace it earlier if it shows cracks, edge wear or a width below the service limit. Check the variator rollers and sliders at the same time. ### When should brake pads be replaced? When the friction material reaches the manufacturer's wear limit (on most pads, when the wear groove disappears, at roughly 1.5–2 mm). The calculator only shows when to inspect; pad life varies a lot with riding style. ### Why does the calculator say the owner's manual takes priority? Two engines of the same capacity can have different intervals because of oil capacity, cooling and design. These values are a general guide; follow the manual's table, the warranty terms and your service's advice. > Results are for information only and are based on theoretical calculations. For parts and maintenance, follow your motorcycle's owner's manual and the manufacturer's specifications. - **Page:** https://motorsikletparcasi.com/en/tools/maintenance-interval-calculator --- - Source page: https://motorsikletparcasi.com/en/tools/maintenance-interval-calculator - Last updated: 2026-10-08 - Türkçe sürüm: https://motorsikletparcasi.com/araclar/bakim-periyodu-hesaplayici.md - Site overview: https://motorsikletparcasi.com/en/llms.txt - Append .md to the URL of any product, category, motorcycle, brand, blog or company page on this site to get its Markdown version.