The stroke of SR400 is extended from 67.2mm to 92mm. The crank weight circumference is 141.7mm, the same as the SR500 except the early model.
Caution
*If you install with stock bore and stock piston, you can't use it because piston and crank circumference collide with each other.You may need to widen the bore or use a short skirted piston. *This is not a product that can be installed without modification.
![【MIZUNO MOTOR】[ZETH] 92mm Long Stroke Crankshaft for SR400/500 - Webike Thailand](https://img.webike-cdn.net/500x500/catalogue/images/36544/3-y-t_sr400_01.jpg "【MIZUNO MOTOR】[ZETH] 92mm Long Stroke Crankshaft for SR400/500 - Webike Thailand")
![【MIZUNO MOTOR】[ZETH] 92mm Long Stroke Crankshaft for SR400/500 - Webike Thailand](https://img.webike-cdn.net/500x500/catalogue/images/36544/3-y-t_sr400_02.jpg "【MIZUNO MOTOR】[ZETH] 92mm Long Stroke Crankshaft for SR400/500 - Webike Thailand")
![【MIZUNO MOTOR】[ZETH] 92mm Long Stroke Crankshaft for SR400/500 - Webike Thailand](https://img.webike-cdn.net/500x500/catalogue/images/36544/3-y-t_sr400_03.jpg "【MIZUNO MOTOR】[ZETH] 92mm Long Stroke Crankshaft for SR400/500 - Webike Thailand")
![【MIZUNO MOTOR】[ZETH] 92mm Long Stroke Crankshaft for SR400/500 - Webike Thailand](https://img.webike-cdn.net/s52/catalogue/images/36544/3-y-t_sr400_01.jpg "【MIZUNO MOTOR】[ZETH] 92mm Long Stroke Crankshaft for SR400/500 - Webike Thailand")
![【MIZUNO MOTOR】[ZETH] 92mm Long Stroke Crankshaft for SR400/500 - Webike Thailand](https://img.webike-cdn.net/s52/catalogue/images/36544/3-y-t_sr400_02.jpg "【MIZUNO MOTOR】[ZETH] 92mm Long Stroke Crankshaft for SR400/500 - Webike Thailand")
![【MIZUNO MOTOR】[ZETH] 92mm Long Stroke Crankshaft for SR400/500 - Webike Thailand](https://img.webike-cdn.net/s52/catalogue/images/36544/3-y-t_sr400_03.jpg "【MIZUNO MOTOR】[ZETH] 92mm Long Stroke Crankshaft for SR400/500 - Webike Thailand")
![【MIZUNO MOTOR】[ZETH] 92mm Long Stroke Crankshaft for SR400/500 - Webike Thailand](https://img.webike-cdn.net/catalogue/images/36544/3-y-t_sr400_01.jpg "【MIZUNO MOTOR】[ZETH] 92mm Long Stroke Crankshaft for SR400/500 - Webike Thailand")
![【MIZUNO MOTOR】[ZETH] 92mm Long Stroke Crankshaft for SR400/500 - Webike Thailand](https://img.webike-cdn.net/catalogue/images/36544/3-y-t_sr400_02.jpg "【MIZUNO MOTOR】[ZETH] 92mm Long Stroke Crankshaft for SR400/500 - Webike Thailand")
![【MIZUNO MOTOR】[ZETH] 92mm Long Stroke Crankshaft for SR400/500 - Webike Thailand](https://img.webike-cdn.net/catalogue/images/36544/3-y-t_sr400_03.jpg "【MIZUNO MOTOR】[ZETH] 92mm Long Stroke Crankshaft for SR400/500 - Webike Thailand")
![【MIZUNO MOTOR】[ZETH] 92mm Long Stroke Crankshaft for SR400/500 - Webike Thailand](https://img.webike-cdn.net/catalogue/images/36544/3-y-t_sr400_01_TS.jpg "【MIZUNO MOTOR】[ZETH] 92mm Long Stroke Crankshaft for SR400/500 - Webike Thailand")
![【MIZUNO MOTOR】[ZETH] 92mm Long Stroke Crankshaft for SR400/500 - Webike Thailand](https://img.webike-cdn.net/catalogue/images/36544/3-y-t_sr400_02_TS.jpg "【MIZUNO MOTOR】[ZETH] 92mm Long Stroke Crankshaft for SR400/500 - Webike Thailand")
![【MIZUNO MOTOR】[ZETH] 92mm Long Stroke Crankshaft for SR400/500 - Webike Thailand](https://img.webike-cdn.net/catalogue/images/36544/3-y-t_sr400_03_TS.jpg "【MIZUNO MOTOR】[ZETH] 92mm Long Stroke Crankshaft for SR400/500 - Webike Thailand")