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A high efficiency single circuit, short push type master cylinder. Fixed through a trunnion system running in needle roller bearings and with a one piece piston / push rod it offers a significant improvement in efficiency over traditional cylinder designs.
Ranging from 14mm to 7/8" with 30mm stroke and 15/16" to 1.00" with 28mm stroke.

The following master cylinder part numbers have larger body dimensions, please check customer drawing before cylinder selection.
CP7854-93 / -94 / -95 & -96.

Engineering changes to CP5855 Master Cylinders which have been superceded by CP7855.
Repair Kits for all CP5854 bores sizes are still available, part number e.g. CP5854-88RK etc, for more information please contact AP Racing Technical Section.

- Hard anodised Aluminium Alloy body.
- Compact Design. 
- Extra Short travel to cut-off standard.
- One piece piston and push rod.
- Use with CP5520-3, -4 or -13 Trunnion type balance bar or purpose designed pedal box.
- Full range of 10 bore sizes. 
- Rubber boots fitted as standard.
- Replaces CP5854 family

Weight.28 to .293Kg (.61 to .64lbs)
Full Stroke14mm to 7/8" Bores - 30mm (1.18")
- 15/16" to 1.0" Bores - 28mm (1.10")
Travel To Cut-OffExtra Short - .48 to .63mm (.19" to .25")
Inlet Hydraulic Thread7/16" x 20UNF
Outlet Hydraulic Thread3/8" x 24UNF
Push Rod ThreadsPRTE = 5/16" x 24UNF
Bore Sizes AvailablePart Numbers
15.9mm (.625") 5/8"CP7854-90PRTE
17.8mm (.70")CP7854-91PRTE
19.1mm (.75") 3/4"CP7854-92PRTE
20.6mm (.812") 13/16"CP7854-93PRTE
22.2mm (.875") 7/8"CP7854-94PRTE
23.8mm (.937") 15/16"CP7854-95PRTE
25.4mm (1.00")CP7854-96PRTE
Click on the link to download the relevant drawing
CP7854 Customer Drawing