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
 
 

Customer Feedback Ratio Rebuilds

"Good evening Dave, just to let you know the C15 got a proper test today at the VMCC trial at Chedworth.  The engine is an absolute treat, can't believe how nicely it runs."

  
Comment and photo from Jon Cull January 2018
who rides in the South Western Centre. 

Engine is 1967 C15 G fitted with 5TA piston giving 280cc, wide ratio gearbox and 18t crank sprocket. Electrex world ign.
Built to this spec by Ratio Rebuilds 2017.



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