Sym 125cc crox lost a bit of acceleration power after its first service. Its still new with 480 km on clock. What could be the cause of this??

SOURCE: where can i get a sym husky 125cc workshop manual

http://www.repairmanualclub.com/motomanuals/index.php

SOURCE: hi my names daniel ive

most of the times it is part of the fuel petcock. It would be more of a strainer then a filter. It is used to catch the larger particles that may be in the fuel. This usually requires no cleaning, unless you poured in really dirty fuel or your fuel tank has rust on the inside. Any sediment that makes it to the carb(s) is collected in the float bowl. You can drain this sediment by opening the float bowl drain screw. Use a screw driver of proper size as these screws are very soft. Draining of the float bowl should be done periodically.