check air filter.if u have a filter for the gas on the line, make sure its not clogged up
a bike that is small
The filter on an aquarium should always be running. Your filter is what will primarily contain all your good bacteria from the cycling of your tank, this is what helps keep the water clear, and along with regular water changes in your tank, it keeps the ammonia, nitrites, and nitrates at or near 0.
You should change a filter once a month or when airflow lessens, unless it is a reusable filter then clean weekly.
100% legal in nearly every country everywhere. that's if the motor is under 50cc. most pocket bikes are 49cc.
also do I change it befor the 3rd month?
1 a month
http://willapse.hubpages.com/hub/Best-Electric-Scooter
Your tank filter should be changed every month. If your filter becomes clogged, it should be changed right away.
Every month or so. Depending on what type of filter it is. Some go as long as 3 months.
no NEW ANSWER: The above answer is correct if yours is the early month of 87 and has a carburetor. If it is a LATE month of 87 then it will be a fuel injected engine and the heads WILL interchange.
You wait a month and check your filter
One every month if you have allergies.