Can't see your brake fluid level? This Universal 18mm Brake Master Cylinder Reservoir Sight Glass is the simple, affordable fix you need! It's a direct replacement for the cloudy, cracked, or faded plastic window on many motorcycle brake fluid reservoirs. This one is made from clear glass so you can easily check your fluid level and keep your brakes safe.
It's a universal 18mm size, which fits a huge range of dirt bikes, sport bikes, cruisers, and ATVs from brands like Honda, Yamaha, Kawasaki, Suzuki, and more (as long as your old sight glass measures 18mm). The kit includes one glass lens and one rubber sealing gasket—everything you need for a proper, leak-free seal.
Installation is pretty straightforward for a DIYer:
1. Drain and clean your brake reservoir.
2. Remove the old sight glass and gasket.
3. Place the new rubber gasket in the hole.
4. Gently press the new glass into place.
5. Use a soft cloth and a hammer to tap it flush (be careful!).
6. Refill with brake fluid and bleed the brakes.
Note: Always double-check the size (18mm) and shape matches your old part before ordering. This is for the sight glass ONLY, not the entire reservoir. A small part that makes a big difference in maintenance and safety! Get a clear view and ride with confidence. 🏍️
