Vacuum and fuel lines
 

Ive had my scoot for about 3+ months now. I bought it new. It now has 350 miles. I've changed out the oil and gear oil at both 100 and 300 miles for break in. I changed out the CDI to an after market and coil and wire. The only issue I am really having is ...I dont think the auto choke is working right. it turns off too soon before the engine is warm enough to not stall. I want to change out all the fuel and vacuum lines. What size and how much should I need...length wise.

2013 BMS Chelsea 150cc GY6 clone

3/16" for the fuel line, dont know about the vacuum line thou, havent change that YET as far as length goes you have measure the old hoses with the new hoses, i just ordered a fuel line and it comes with 3 ft. but if i need more i will just reorder

Also, the choke may not be working properly if your idle mixture isn't right. I would make sure that's dialed in so you can trouble shoot your original problem, then move on the hoses. That way if changing the hoses creates a problem you're not chasing your tail with 2 different problems. One old problem and one new problem.

Good idea. I went to the dealer I bought it from. We are going to make an appointment under the warranty. Ill let them play with the idle

The people at BMS usually order their scooters from China with better quality materials. It's why they cost a few hundred more than comparable models. You might try running a little Seafoam or fuel system cleaner. It is always possible that a bad batch of fuel found its way into your scooter and micro crud is leaning out the fuel flow. Just a thought.

Funny I just tried that before reading this. Putting some through it right now. Also... The air/fuel screw is capped and I cant get to it. Is the screw under that cap.... and does the cap come off so I can adjust?

On a BMS yes. The a/f mixture screw is under that cap. You might have to CAREFULLY drill a small hole in it and pry the cap out.