750 ml for an oil change. it holds 900 ml. so 3/4 of a quart. yes its a gy6. same engine on scooters. i personally used 10w40 in the winter and 15w40 in the summer. there are tons of stuff you could do with the 150cc gy6. dont worry about the sprockets. the main mods for more power come from the transmission. which is a cvt belt driven style. and replacing the carburetor with one you can get access to clean and change the jets is recommended. for more torque and power off the line i recommend changing the variator , clutch, and belt. go on ebay or any scooter websites and look for a name brand performance variator. the stock variator comes with 14g weights. i suggest going down to 11 or 12 gram. the rear pulley has 3 main parts, the pulley itself, the spring, and the actual clutch disc. i replaced all of them, you dont have to replace the pulley if you dont want to, but i would recommend going to a 1500rpm spring, and getting a performance clutch. you can also replace the bell that goes around the clutch that the clutch pads grab on to, but you dont have to. look for a Bando brand kevlar belt or Gates brand premium belt. there are 2 types of gy6 engine. long case and short case. long case has 10 bolts that holds the cvt cover on, and the short case has 8 bolts. one uses a different size belt then the other. when you take the cover off, look at the belt, it should have the size on it. do these things and youll be amazed at how much dirt youll kick up. search videos on youtube if you dont know what you are doing or arent familiar with things. i actually have a link i found that helped me when i was modding my 150 gy6 thats on my coolster 3150-dx2. like i said there are tons of websites and brands, try to stay away from ebay if you can because you can get cheap knock off parts. where real scooter websites selling gy6 parts have the real stuff. hope this helps.
http://chineseatvperformance.blogspo...asian.html?m=1
http://www.scooterdynasty.com/150ccg...radestips.aspx