<b>🌹Important note: The pulling force of this chain is 750-780 kg, which is easy to break beyond this pulling force.</b><br><br> <b>🌹Please no hesitation send the email to us if you have any question of the product or your order, we have a professional customer service team dedicated to you.</b><br><br> <b>🌹Perfect for 49cc to 80cc 2-Stroke Engine Motorized Bikes/Bicycle I CH15</b><br><br> <b>🌹Tips</b><br> Our 415 Chains are considered heavy duty chains and are only compatible with Replacement for Flying Horse and Replacement forMega Motors Bicycle Engine Kits. Most engin e kit's drive sprockets will need to be modified to fit these chains, including filing the teeth down. <br><br> <b>🌹Chain Breaker Tool</b><br> Universal Chain Breaker Tool.<br> Very solid, durable design.<br> Replaceable press pin is heat treated and hardened.<br> It is recommended to grind off the chain pin head before using this tool.<br> Please be sure to verify that the push pin is aligned properly with the chain pin.<br><br> <b>🌹Package include: </b><br> 1 x 415 Chain<br> 10 x Chain Master Link<br> 1 x Chain Breaker tool