Front Brake Master Cylinder schematic Honda Ns400rf (european Direct Sales)

Well if this is broken, you can't fix it! You have to buy a new one, but at least when you buy on line at CMS, the part is affordable and will be delivered promptly!
We try to make buying Honda spares a pleasure not a pain, and should take no more effort on your behalf than a click of your mouse!
Before specifying your order, try browsing the online catalogue for your model, you may find items that you may otherwise have overlooked, and help you take the best advantage of your shipping costs!

Keep road grit, water and other contaminates out of the master cylinder, as soon as you notice damage or degradation in this protective boot, replace it.
For your entire Honda brake parts requirements, check out the online catalogue for your model, remember at CMS we actually stock these parts in our substantial warehouse facility, this ensures you receive a speedy shipping service, competitive pricing, all backed up with our state of the art online purchasing system.

When purchasing this MASTER CYLINDER CAP why not order the screws and diaphragm required at the same time - check these items out for suitability:

93600040120G
45520MG7006

Renewing this item when replacing the diaphragm is not essential, but it is desirable to renew a many parts as possible during an overhaul of the braking system - For reliability and safety.

Simplify the overhaul of this area of your braking system, with this inexpensive kit of genuine Honda parts, which when fitted correctly will bring you brakes back showroom fresh effectiveness!
For other brake components that may need renewing, check the online 'parts list' fiche for your model, and see all the parts clearly with the 'zoomify' facility, where they fit and importantly the correct part numbers!

A new genuine Honda pivot-bolt is a guarantee of correct machining, original type finish and correct grade of materials used in the manufacturing process.
For your entire Honda parts requirements, access the on-line 'gallery' or where available the on-line schematic for your model, and take a more informed decision when placing your order!

Specifying only genuine Honda Brake-line bolts means buying bolts made in Japan to Honda quality control standards - With brake related parts would you take the chance on using any other make!

Don't use substitutes, choose only genuine Honda replacement parts, even a nut like this has a job to do, and when it is made by Honda, you know that job will be carried out perfectly, now and over the longer term.
You may be interested in this related item:

90441706000

Reusing the old screw is simply not worth the risk! The old item may have been stretched and have possible thread damage - Either way they will be difficult to torque up properly!
This is the 4 x 12 WASHER-HEAD(flanged head)SCREW.