hi there,been reading a few of the experiences of people with chinese atv's and bikes,i bought a 150cc quad 2 1/2 years ago and the first thing i did after assembling it was to go right over the quad and check every nut and bolt i could get a spanner or scewdriver on and there were a few that needed tightning,its on my son's property and gets used all the time, in fact it is now my grandson's(10) and is still going strong.i put a decent driving light on it,took the crappy air cleaner of and fitted an after market pod filter and make sure the oil is changed regulary,it gets a fair hiding climbing up washed out bush tracks, racing on tracks cut into the bush and general riding,iv'e had a few minor issues but no more than you would expect with any quad and its always got me home.iv'e just up graded to a 250cc and did exactly the same to it as the 150.i also own a motor bike xr400 but thats a different story.as you can see ive had quite a bit of expereince with these quads and other vehicles 35yrs and if any one needs some tips or a bit of advice you can contact me thru ebay