KustomTech Custom Pumps

KustomTech custom pumps, also called external master cylinders, mount away from the handlebar, under the tank or along the frame. The cockpit is then left completely clear, with a short lever and a hose running back.

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When KustomTech custom pumps make sense

On a slim bar or a stripped build there is simply no room left for a housing. A remote mount solves that and allows a shorter lever, so a cleaner line. It also makes hydraulic clutch conversions much easier to plumb.

What to plan for

A longer hose, a solid bracket and a clean run. The body has to stay reachable for bleeding and level checks. On the other hand, avoid mounting it too low: the reservoir must sit above the bleed point.

Bore and feel

As on a handlebar model, the bore decides how hard the lever feels. A small diameter suits a single piston caliper, a large one a multi-piston setup. The figure appears on each listing, in inches and in millimetres.

Bleeding and fluid

A remote circuit traps an air bubble more easily. So take the time for a slow bleed, and repeat it the next day if needed. DOT 4 suits the whole range and should be replaced every two years.

Stock and shipping

The five references are held in France and leave within forty-eight hours, in a tracked parcel. Payment runs in euros, by card or PayPal, with no customs charge inside the European Union. If you are converting to a hydraulic clutch and hesitate over the bore, send us your slave cylinder reference: we check the volume ratio before dispatch.

These 5 references belong to the KustomTech custom motorcycle parts range. See also the handlebar master cylinders. Official dimensions are published on the Kustom Tech website.

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