Ratio Publishing
 
RATIO PUBLISHING
Rupert Ratio Books
 
 
Rupert Ratio - About the Author
BSA Specialist
 
 
The Rupert Ratio Unit Single Manual - Volume 1
BSA Unit Single Volume 1 Rupert Ratio
 
 
The Rupert Ratio Unit Single Manual - Volume 2 Everything but the Engine
BSA Unit Single Volume 2 Rupert Ratio
 
 
The Rupert Ratio Unit Single Manual - Volume 3 The Lesser Known Models
BSA Unit Single Volume 3 Rupert Ratio
 
 
Customer Feedback
Customer Feedback for Ratio Publishing
 
 
RATIO REBUILDS
BSA Unit Single Engine Rebuilds and Spares
 
 
B44 Engine Rebuild
B44 Engine Rebuild
 
 
Customer Feedback Ratio Rebuilds
Customer Feedback for Ratio Rebuilds
 
 
Useful Links
Web links
 
 
Gallery
Galery
 
 
CONTACT US
Email contact
 
 
BSA Unit Single Models
C15, B40, B25, B44, B50, Triumph25w
 
 
Purchase Volumes 1 and 2
Purchase Volumes 1 & 2
 
 
Purchase Volumes 1 and 3
Purchase Volumes 1 & 3
 
 
Purchase Volumes 2 & 3
Purchase Volumes 2 & 3
 
 
Purchase Volumes 1 2 & 3
Purchase Volumes 1 2 & 3
 
 

RATIO REBUILDS

PLEASE NOTE THAT DUE TO WORK ALREADY IN HAND EARLIEST AVAILABILITY IS NOVEMBER 2018 ONWARDS

Rupert Ratio is personally able to offer renovation and repair work for your Unit Single Engine.  Anything from a thread repair to a complete engine overhaul to full concourse specification can be undertaken.  All work is carried out with an attention to detail never originally possible at BSA.  Replacement parts used are original new old stock spares wherever possible to maintain the integrity and quality of your engine.  All customer requirements regarding state of tune modifications and finish for your engine can be accommodated.

Please contact Rupert directly through this website using the "Contact Us" tab to discuss your requirements.

Please note that due to volume of work in hand any new work commissioned will need to be scheduled 4 - 5 months ahead.

INDIVIDUAL SERVICES
AVAILABLE FOR YOUR ENGINE

  • CRANKSHAFT OVERHAULS - BIG ENDS FITTED/SMALL END FITTEDREBORES
  • CYLINDER HEAD OVERHAULS - VALVES/GUIDES/SEATS
  • GEAR BOX OVERHAULS
  • REBUSHING AND REAMING - SLEEVE GEAR/CAM BUSHES - C15 TIMING SIDE MAIN BUSH             
  • CASINGS AND FIN REPAIR
  • OIL PUMP OVERHAUL - 2 STUD ZINC PUMPS
  • THREAD REPAIRS



Ratio Rebuilds




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