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
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
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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