Hi there guys i bought a 2010 atomik 125cc moto x with the ducar engine 7 months ago . its been running sweet and gets a floggin every now n then but i reciently went to the frankston mx track did like 10 12 laps of the medium track and on the last lap it started making a clunking grupping sound when in 2 gear o and its slow to engage from first to 2 gear. i snaped the ****ty stock chain about 4 months ago n it kinda makes the same noise when ya chain has gottin stretched n bout to break? Sorry to ramble on but trying to explain it the best i could.. Any help would be great!