1. ZT310 single rocker sprocket seat outer shell assembly (including bearing/oil seal) 
                                                
                                             
                                            
                                         
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                                                        Remarks: Containing DA355520-2RS angular contact bearing, ZT310 single rocker arm Φ45×Φ55×5 oil seal.  
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                                                        2. Bushing Φ45×Φ35×5.5+Φ54×Φ35×2 
                                                
                                             
                                            
                                         
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                                                        3. ZT310 single rocker arm Φ45×Φ55×5 oil seal 
                                                
                                             
                                            
                                         
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                                                        4. DA355520-2RS angular contact bearing 
                                                
                                             
                                            
                                         
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                                                        7. ZT310 single rocker sprocket seat inner shell 
                                                
                                             
                                            
                                         
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                                                        8. ZT310-R1 single rocker sprocket buffer rubber 
                                                
                                             
                                            
                                         
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                                                        9. ZT310 single rocker arm 520-42T sprocket 
                                                
                                             
                                            
                                         
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                                                        Remarks:This is a 42 tooth sprocket,before pruchasing,you can see whether the surface of the sprocket has "42T-520" lettering or count the number of sprocket teeth.   
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                                                        10. ZT310-R1 114 section chain (520 oil seal chain/open type) 
                                                
                                             
                                            
                                         
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                                                        Remarks: Please make sure that the card is facing outwards.ZT310-R / X / T, ZT250-S upgraded version, ZT250-R original car assembled chain is non-open type (ring riveted).Non-open type (ring riveted type) can be purchased open type to facilitate chain replacement. Open-type chains require special chain installation tools. This chain does not include tools and must be purchased separately.Single rocker series models can only purchase this open type chain, not non-open type (ring riveted).  
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                                                        11. Non-standard nut M10×1.5(Dacromet) 
                                                
                                             
                                            
                                         
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                                                        12. Non-standard bolt M10×1.5×30 (environmental color) 
                                                
                                             
                                            
                                         
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