Kawasaki ZXR 250 R (ZX 250 D1) 91 DID ZVM-X Super Heavy Duty X-Ring Chain and JT Sprocket Kit
Chain and Sprocket Kit
DID ZVM-X Super Heavy Duty X-Ring Chain
DID's ZVM-X Chain uses patented X2-ring seals. Like O rings, X rings function to seal in lubrication and keep dirt out, and for the ZVM range the X rings have been redesigned to offer even greater wear resistance and even less friction than DID's original X rings.
Where the cross-section of an O ring is circular, the cross-section of an X ring is X or cross-shaped. This gives the seal additional contact points compared to the O ring, offering superior sealing and protection against dirt and grit getting stuck under the seal.
In addition, when under pressure an O ring becomes squashed and causes friction. An X ring, when under pressure, diverts this pressure by twisting instead, so an X ring decreases friction between side plates and reduces power loss by 50% of any other type O-ring chain.
DID's X rings have 40% greater wear resistance than their regular X ring chains (the VX range) and 34 times that of a DID standard chain. This means more resistance to stretching, bowing and warping and smoother handling. With proper maintenance, an X2-ring chain will last longer than any O-ring or unsealed chain.
|Pin Length||Roller Diameter||Plate Thickness||Weight||Tensile Strength||Colour|
|21.00||10.22mm||2.2mm||1.63kg per 100 links||38.9KN||Plain|
Sealed chains require lubrication every 500km (300 miles) in order to prevent surface rust and ensure performance.
JT is the best selling aftermarket sprocket in the world. Using the finest raw materials and cutting-edge technology in production, CNC computer design and precision machining, JT ensures maximum durability and performance.
JT front sprockets are made with SCM420 chromoly steel alloy, while the rear sprocket is manufactured with ultra-durable high-carbon C49 steel.
Related Products for DID and JT Chain and Sprocket Kit
DID ZVM-X drive chains are always supplied 'open' with a rivet link (included). You will need a specialised tool in order to rivet the chain, or take it to a mechanic who can do it for you. A spring link is available, but a spring link has only 65% of the strength of a rivet link and therefore, a rivet link is always recommended.
It is important to periodically inspect and lubricate the chain to maximise chain life.
Workshop tools and consumables
Delivery and Returns
We want you to be happy with your purchase. If you're not, just return the products to our warehouse. Unless faulty, we'd like this to be within 30 days of purchase. Exceptions apply to certain products.
Nearly all motorcycles have a drive system comprising of two sprockets: a front sprocket (also known as the counter-shaft or drive sprocket) and a rear sprocket (also known as the driven sprocket).
The front sprocket is attached to the engines transmission output shaft with the rear sprocket mounted to the rear wheel. Both sprockets have teeth which slot into the gaps in the motorcycle's drive chain.
The sprockets work in tandem with their teeth engaging between the drive chain links. The front sprocket rotates at the same time as the engine's transmission output shaft, and the teeth pull the drive chain, in turn rotating the driven sprocket as it traverses. This system transfers the power from the engine to the rear wheel, moving the motorcycle forward.
This pulling force is transmitted via the side plates of the chain through the chain's pins to the rollers. The distance between the centres of the pins is equal to the distance between the centres of the sprocket teeth. This means that the force pulling the chain is equally distributed among the rollers.