Gy6 Air filter upgrade.

[Matt15022007]

I have a yerfdog spiderbox with a stock gy6. I want to put on a uni style air filter and eliminate the air box. What size jets do I need for the stock carb to avoid running lean and are there any concerns with the other air lines that run into the air box?

[ckau]

While using the stock exhaust and muffler , 118 to 122 would probably be the range. Letting a larger volume of air and fuel into the motor without a way to get that volume of air out will most likely cancel out any performance gain. Using larger exhaust pipe and a straight through muffler will complete the system. but using a UNI still beats the stock air box for dependability and service.

[Matt15022007]

Thank you for the info. Now I have to figure out the lights. No power coming to them, but everything else works.