|  |  |  | 
|  | 
|  | 
| 
               #
            1   
            | |||
| 
 | |||
|  
            Xt660R 2004 Co- stock? 
            
             Hello frends!
             I have on me 2004 yamaha c1=47. Im not the first owner and not sure this number is from the factory. As i know from this forum normal C1 for the 2004-2006 year is 5-15 for xtx. Is this number same for xtx and xtr? ps my bike is full stock. Now i tune c1 to 15 and hardly see any difference. What would be the optimal c1 for my engine? | 
|  | 
| Thread Tools | |
| Display Modes | |
| 
 | 
 |