Big Boyz Head Porting  

 

                     
  Drive Ratio Comparator  
   
           
   Tire Diameter   Select Year    Optional Transmission   
   in    
       
  Sprocket Teeth   Alternate Sprocket Teeth Drive Ratio    
  Engine  <<>> Alternates Over-Ride Preselected Values   Primary     
  Clutch      Secondary     
Trans Pulley     
Rear Pulley  <<>>   Overall Drive Ratio  
  1st  
Transmission Gear Ratio   Alternate Gear Ratio   2nd  
  1st  <<>>   3rd  
  2nd    Alternates Over-Ride Preselected Values   4th  
  3rd      5th  
  4th      6th  
  5th      7th  
  6th           
  7th  <<>>     Travel Speed MPH  
      RPM   
Belt Calculator Tire Calculator   1st  
  2nd  
Mainshaft to Axle   in Tire Size   mm 3rd  
Belt Pitch   mm  % 4th  
      Rim Size   in 5th  
Belt Size   Teeth       6th  
      Tire Dia.   in 7th  
           
         
               
         
         
             
         
         
  7th    
  6th    
  5th    
  4th    
  3rd    
  2nd    
  1st    
  RPM 1000 2000 3000 4000 5000 6000 7000    
     
     
                     
                     
         
  This calculator is supplied as a convenience and intended to be used for estimates only.  We make no warranties, implied or expressed, to the accuracy of any data or calculations presented here.  
   
   
         










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