| Lighter Springs:
• 58N/mm (331 lbs/in) springs have the Ohlins’ stiffness code -13, rider weight 55-60Kg
• 1091 length spring is not available with Ohlins’ stiffness code -14, rider weight 60-65Kg
• 62N/mm (354 lbs/in) springs have the Ohlins’ stiffness code -15, rider weight 65-70Kg
• 64N/mm (365 lbs/in) springs have the Ohlins’ stiffness code -16, rider weight 70-75Kg
So, Ohlins doesn't make a -14 spring in the 1091mm length. They do make a -13, 58N/mm spring for a rider weight of 55-60 Kg which is too light for you assuming you're wearing 4Kg of gear.
You haven't mentioned the front forks. Have you re-sprung these also, and are you getting full travel? Also remember to set your sag measurements with a half tank of petrol. | 
Shazaam!
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