
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
REBUILD ADVICE BSA Unit Single Engine Advice & purchase of parts
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 & 2 Purchase Volumes 1 & 2
Purchase Volumes 1 & 3 Purchase Volumes 1 & 3
Purchase Volumes 2 & 3 Purchase Volumes 2 & 3
Purchase Volumes 1 2 & 3 Purchase Volumes 1 2 & 3
Something Alternative! Not just an Author and a Unit Single fan! WW2 Themed Wedding

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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