Spent the morning swapping out my front sprocket from a 14 to a 15 tooth one.
Obviously a very tight front socket nut....... had to remove back wheel and pin the chain (see Del Boy's Garage videos) (only snapped one screwdriver!) and had to use my trust impact wrench to get the nut off, after beating back the deformable metal washer.
Straight swap and, even better, with the chain adjusters right forward I did not need to alter the chain length
Bike feels much more likeable...... much less frantic at higher speeds and will easily do over 80mph now , well within the RPM limit.
Very pleased I have done it.
Even wonder if I might reduce the number of teeth on the Rear Sprocket (Wemoto do a 2-tooth reduced one) but this likely would involve a chain shortening procedure......may have to wait until Suzy needs a new rear tyre or new chain.