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Welcome Offer : Use Code WELCOME5 for 5% OFF!
Free Shipping on Most USA Orders
Welcome Offer : Use Code WELCOME5 for 5% OFF!
Free Shipping on Most USA Orders
Welcome Offer : Use Code WELCOME5 for 5% OFF!
Free Shipping on Most USA Orders
Welcome Offer : Use Code WELCOME5 for 5% OFF!
Free Shipping on Most USA Orders
Welcome Offer : Use Code WELCOME5 for 5% OFF!
Free Shipping on Most USA Orders
Welcome Offer : Use Code WELCOME5 for 5% OFF!
Free Shipping on Most USA Orders
Welcome Offer : Use Code WELCOME5 for 5% OFF!
Free Shipping on Most USA Orders
Welcome Offer : Use Code WELCOME5 for 5% OFF!
Free Shipping on Most USA Orders
Welcome Offer : Use Code WELCOME5 for 5% OFF!
Free Shipping on Most USA Orders
⚠️ California Proposition 65 Warning : Some products sold on this website may expose you to chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm.
For more information, visit www.P65Warnings.ca.gov.
Reproduction Honda Rubber Diaphragm For The Front Or Rear Master Cylinder. This Is The Diaphragm That Seals Between The Brake Reservoir Cap And The Master Cylinder Assembly. If You Notice That Your Brake Fluid Reservoir Is Leaking Fluid Onto Your Gas Tank, It Could Be The Diaphragm That Isn'T Making A Tight Seal Or The Leak Could Be Coming From The Piston. Check The Fitment List Below To See Where It Was Used On Your Model. Brake Fluid Will Ruin Painted Surfaces, It'S Best To Keep It Where It Belongs! Sold Individually. We Also Carry The Plastic Washer Used On The Master Cylinder, Sold Separately And Available On Our Site, 4Into1. Honda Part Number: 45520-300-000 Fits Honda - (Note Front Or Rear):Atc250R - 1982 - Rearcb350F Four - 1972-1974 - Frontcb360K - 1974 - Frontcb360T - 1975-1976 - Frontcb360G - 1974 - Frontcb400A Hondamatic - 1978 - Frontcb400F Super Sport - 1975-1977 - Frontcb400Tii Hawk - 1978 - Frontcb450K - 1970-1974 - Frontcb500K Four - 1971-1973 - Frontcb500T Twin - 1975-1976 - Frontcx500 - 1978 - Frontcx500Tc Turbo - 1982 - Rearft500 Ascot - 1982-1983Vf500F Interceptor - 1984-1986 - Rearcb550F Super Sport - 1975-1977 - Frontcb550K - 1974-1978 - Frontcx650T Turbo - 1983 - Rearvf700F Interceptor - 1984-1985 - Rearvfr700F Interceptor - 1986-1987 - Rearcb750A Hondamatic - 1976-1978 - Frontcb750F Super Sport - 1975-1976 - Front + Rearcb750F Super Sport - 1977-1982 - Rearcb750K - 1969-1978 - Frontvf750F Interceptor - 1983-1984 - Rearvfr750F Interceptor - 1986, 1994-1997 - Rearvfr750R - 1990 - Rearvfr800 - 2002-2009 - Rearcb900C - 1980-1982 - Rearcb900F Super Sport - 1981-1982 - Rearcb1000C - 1983 - Rearcbx - 1979-1982 - Reargl1000 Gold Wing - 1975-1979 - Reargl1000 Ltd - 1976 - Rearvf1000F Interceptor - 1984 - Rearvf1000R - 1985-1986 - Rearcb1100F Super Sport - 1983 - Reargl1100 Gold Wing - 1980-1983 - Reargl1100A Gold Wing Aspencade - 1983 - Reargl1100I Gold Wing Interstate - 1983 - Rearst1100 - 1991-2002 - Rearvf1100C - 1983-1986 - Rearvf1100S - 1984-1985 - Reargl1200 Gold Wing - 1984 - Reargl1200A Gold Wing Aspencade - 1984-1986 - Reargl1200Sei Gold Wing - 1986Vfr1200F - 2010, 2012-2014Vfr1200X - 2016 - Rearvt1300Cx - 2010-2015 - Reargl1800 Gold Wing - 2001-2005Gl18003 - 2006-2008Gl18004 - 2006, 2009, 2010, 2012, 2013-2016Gl18005 - 2006-2010, 2012-2016Gl18007 - 2006-2010, 2012-2016Gl18008 - 2006-2010, 2012-2014 And Many Others....Fits Nearly 1000 Different Honda Models... &Nbsp;
Yes, we offer free standard shipping on all orders within the United States.
When will I receive my item?
Domestic orders typically arrive within 3-5 business days. Delivery times are estimated and may vary depending on your location, weather conditions, or other unforeseen factors.
Can I change or return my item?
We hope you love your purchase, but if you need to make a change or return your item, we’ve got you covered! You can initiate a return or exchange within 30 days of receiving your order. Please ensure the product is in its original condition and packaging. For more information on our return policy, please visit our Returns & Exchanges page.
Frequently Asked Questions
Q: What is the part number for the brake master cylinder diaphragm?A: The part number is four five five two zero dash three hundred dash zero zero zero.
Q: What models is the brake master cylinder diaphragm compatible with?A: This diaphragm fits nearly one thousand different Honda models, including the CB350, CB360, and CB750.
Q: What material is the brake master cylinder diaphragm made of?A: The diaphragm is made of high-quality rubber designed for durability and reliable sealing.
Q: How do you install the brake master cylinder diaphragm?A: To install, remove the brake reservoir cap, replace the old diaphragm with the new one, and ensure a tight seal.
Q: Can this diaphragm be used for both front and rear brake master cylinders?A: Yes, this diaphragm is suitable for both front and rear brake master cylinders.
Q: Is there a plastic washer available for the master cylinder?A: Yes, a plastic washer is sold separately and is also available on our site, four into one.
Q: How should I check if my diaphragm is leaking?A: Inspect for brake fluid leaks around the brake reservoir cap, indicating that the diaphragm may not be sealing properly.
Q: How do I keep the diaphragm in good condition?A: Keep brake fluid away from painted surfaces and regularly check for leaks to maintain the diaphragm's integrity.
Q: What should I do if my brake fluid reservoir is leaking?A: If leaking occurs, inspect the diaphragm for damage or improper installation, and replace it if necessary.
Q: Does this diaphragm come with a warranty?A: Yes, the diaphragm is covered under a manufacturer's warranty against defects in materials and workmanship.
Q: How do I clean the area before replacing the diaphragm?A: Use a clean, dry cloth to wipe the area around the brake reservoir and ensure no dirt or debris interferes with the seal.
Q: Is the installation of the diaphragm straightforward for beginners?A: Yes, the installation process is simple and can be done with basic tools, making it beginner-friendly.
Q: What happens if I install the diaphragm incorrectly?A: Incorrect installation can lead to improper sealing, resulting in brake fluid leaks and compromised brake performance.
Q: Can I use this diaphragm with aftermarket brake systems?A: Compatibility with aftermarket systems depends on the specific model; check fitment before purchase.
Q: Is it safe to use this diaphragm for racing applications?A: While it is designed for standard use, consult with a professional to determine suitability for racing applications.
Q: How long does the diaphragm typically last?A: With proper maintenance, the diaphragm can last several years before needing replacement.