# Blog – maintenance and parts guides > 14 guides on motorcycle maintenance and choosing spare parts. - [Motorcycle Brake Fluid: DOT 3, DOT 4 and DOT 5.1 Differences and When to Change](https://motorsikletparcasi.com/en/blog/motorcycle-brake-fluid-change-dot-4) (2026-10-09): Brake fluid absorbs moisture and its boiling point drops, which can cause brake fade under hard braking. We explain DOT grades, which fluids can be mixed and the steps of a fluid change. - [Motorcycle Charging System: How to Diagnose Stator and Regulator Faults](https://motorsikletparcasi.com/en/blog/motorcycle-charging-system-stator-regulator-faults) (2026-10-09): If the battery keeps going flat, the charging system is usually to blame. We explain how the stator, regulator rectifier and battery work together, simple multimeter tests and the most common causes of failure. - [Motorcycle Chain Sizes: 428, 520, 525 and 530, Link Count and Gearing](https://motorsikletparcasi.com/en/blog/motorcycle-chain-sizes-428-520-525-530) (2026-10-09): In a chain code the first digit gives the pitch and the last two the width. We explain 428, 520, 525 and 530 chains, how link count is worked out, O-ring/X-ring types and what changing the gearing does. - [Scooter Drive Belt Sizes Explained: Belt Codes, Measuring Width and When to Replace](https://motorsikletparcasi.com/en/blog/scooter-drive-belt-size-guide) (2026-10-09): A scooter drive belt is chosen by length, width and angle. We explain belt codes, measuring belt width with a caliper, signs a belt needs replacing and how Bando, Mitsuboshi and Gates belts cross-reference. - [Genuine or Aftermarket? OEM, Pattern and “OEM Quality” Motorcycle Parts Explained](https://motorsikletparcasi.com/en/blog/genuine-vs-aftermarket-motorcycle-parts) (2026-10-09): Genuine (OEM), aftermarket (pattern) and “OEM quality” don't mean the same thing. We explain the differences, when each makes sense and how our product pages show the part type. - [How to Read Motorcycle Tyre Sizes: 120/70-17, Load Index, Speed Rating and DOT Code](https://motorsikletparcasi.com/en/blog/how-to-read-motorcycle-tyre-sizes) (2026-10-09): The size on a tyre sidewall gives width, aspect ratio, construction and rim diameter. Learn to read load index, speed rating, TL/TT and the production date, and what happens if you fit a different size. - [Motorcycle Winter Care: Storage Steps and a Checklist for Winter Riding](https://motorsikletparcasi.com/en/blog/motorcycle-winter-storage-and-care) (2026-10-09): Preparing a motorcycle for winter means protecting the battery, fuel system, tyres and chain for the lay-up. For those who keep riding, we also list what to watch in cold weather. - [Choosing Motorcycle Oil: 10W-40 or 15W-50? JASO MA, MA2 and MB Explained](https://motorsikletparcasi.com/en/blog/motorcycle-oil-guide-10w-40-15w-50-jaso) (2026-10-09): Motorcycle oil is chosen by viscosity (10W-40, 15W-50) and JASO standard together. We explain the numbers, wet vs dry clutch requirements, mineral vs synthetic oil and what to watch during an oil change. - [Choosing a Motorcycle Spark Plug: NGK Codes, Heat Range and When to Replace](https://motorsikletparcasi.com/en/blog/motorcycle-spark-plug-guide-plug-codes) (2026-10-09): A spark plug code describes thread size, reach, heat range and electrode type. Learn to read NGK codes, the difference between iridium and standard plugs, what plug colour tells you and how to fit plugs correctly. - [How to Choose a Motorcycle Battery: What Codes Like YTX7A-BS and YTZ10S Mean](https://motorsikletparcasi.com/en/blog/motorcycle-battery-guide-battery-codes) (2026-10-09): The right motorcycle battery is chosen by code, terminal layout, capacity and technology. We explain battery codes, how to prepare a dry-charged battery, voltage checks and how to make a battery last. - [Motorcycle Service Checklist: Oil, Filters, Spark Plugs and More](https://motorsikletparcasi.com/en/blog/motorcycle-service-checklist) (2026-09-29): Regular servicing extends engine life, lowers fuel consumption and keeps you safe. A checklist covering oil choice, filters, spark plugs, brake fluid, tyre pressure and more. - [Motorcycle Chain and Sprocket Kits: Maintenance, Slack Adjustment and Replacement](https://motorsikletparcasi.com/en/blog/motorcycle-chain-and-sprocket-maintenance) (2026-09-22): A regularly cleaned and lubricated chain lasts longer and transmits power efficiently. Chain types, slack checks, wear signs and why the kit should be replaced together. - [Scooter Variator Maintenance: When to Replace Rollers, Belt and Clutch](https://motorsikletparcasi.com/en/blog/scooter-variator-maintenance-rollers-belt-clutch) (2026-09-15): Judder when pulling away, lost acceleration or a low top speed usually point to the variator. Here's how a scooter CVT works, the warning signs and which parts should be replaced together. - [When to Replace Motorcycle Brake Pads: 6 Signs and a Simple Check Guide](https://motorsikletparcasi.com/en/blog/when-to-replace-motorcycle-brake-pads) (2026-09-08): Worn brake pads increase stopping distance and can damage the disc. Learn the warning signs, how to check pad thickness, the difference between sintered and organic pads and how to pick the right set. - RSS feed: https://motorsikletparcasi.com/feeds/blog.xml?locale=en --- - Source page: https://motorsikletparcasi.com/en/blog - Last updated: 2026-11-11 - Türkçe sürüm: https://motorsikletparcasi.com/blog.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.