Reinforced chain kit with O-rings 13x51x118 KTM SX 125 Sunstar or

O-ring chain kit 13x51x118 Sunstar gold KTM SX 125

Transmission kit par Chain 520 complete new adaptable for motorcycle cross 125cc KTM SX.

This drive train kit includes:

• 1 x 520 rear sprocket
• 1 x 520 front sprocket
• 1 x 520 chain
• 1 x 520 split link
• 4 x Quick Coupling O-Rings

Technical characteristics and dimensions of the chain kit

• Kit brand: Sunstar
• Drive train type: 520

• Chain brand: Sunstar
• Number of chain links: 118
• Chain color: golden yellow
• Chain with quick coupler and O-rings

• Pinion brand: Sunstar
• Number of front sprocket teeth: 13
• Sprocket color: gray
• A - Inner width (outer diameter of gearbox shaft): 25mm
• B - Inner width: 22 mm

• Crown mark: Sunstar
• Number of rear sprocket teeth: 51
• Crown material: aluminum
• Crown color: black
• Number of fixing holes: 6
• A - Fixing center distance: 75 mm
• B - Fixing center distance: 130 mm
• C - Fixing center distance: 150 mm
• D - Diameter of fixing holes: 8 mm
• E - Inner diameter of the crown: 125 mm

Practical advice: to optimise your drive train, you could add a front sprocket to the one supplied in the kit:

• for more acceleration, take a smaller gear
• for higher top speed use a larger front sprocket

To mount a chain with a split link you just need multigrip pliers and perhaps a flat screwdriver. Otherwise you would need a motorcycle chain splitter tool for riveted chains.

To find out how to choose the right chain kit, refer to our guide in by clicking here.

Sunstar is a brand specialized in the design of transmissions for two-wheelers. To discover our range of products Sunstar, click on this link.