Hi Lola
Here is the suggested ratio's for a FF1600 on ACB10 (22"), since you're a Mono I resume you have slicks and wings, don't know if that makes a difference. Also depends on your CWP ratio
Are you on short or full circuit ?
Classic FF1600 ratios (Kent engine) Avon ACB10 22" CWP 9/31
Short
15/36 19/31(or 20/32) 22/29 24/26 (or 25/27)
Long
17/33(or 17/34) 20/31 22/29 24/26 (or 25/27)
of course this assumes you are made of money and have a complete selection of ratio's
I would suggest going to the Hewland site and downloading their free ratio selector. It's old DOS based but works fine. I use it a lot.
The aim is to get a linear line through the lower rev drop points
Have fun at Donny, say hello to Bev Comber for me.
