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               Originally Posted by 
              Old Git Ray  
              A lot of riders put a 14T sprocket on the front, <snip> 
              
 or increase the fuel consumption much.
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         After extensive 'testing', with multiple bikes, I have to disagree with that. 
         
        
 At cruising speed, the bike is running more revs, this in turn means more fuel - lots more fuel.
         
        
 Over a couple of thousand miles with the following bikes;
         
        
 Bike 1: Akrapovics & K&N Filter, 15T sproket
        
 Bike 2: Single can (no Cat) , Kev Fuel Mod & Foam filter, 15T Sproket
        
 Bike 3 : Completely Stock
        
 Bike 4 : DNA Filter, PC-V, Stock cans and 14T
         
         
        
 Bike 4 was consistantly using .5 to 1 litre of fuel per full tank over the others. With the DNA filter and PC-V I think it is going to be a little richer, but compared to Bike 2 I think the comaprison should be about the same. 
         
        
 The riding was alot of fast off-road and some open road work.
         
        
 After looking at what the 14T delivers over the 15T I am now of the opinion that gearing down is totally un-neccasary as the bike is happier at speed over rough ground anyway, and it revs too high when cruising (with a 14T)
         
        
 I have a 14T that has 2500 miles on it, it will be off the bike today and free to any home that will pay postage - a PM will secure it.