What the Dazhlu 142 air filter does and when to change it
The Dazhlu 142 air filter is a foam or paper cartridge that sits between the outside air and your scooter's engine, blocking dust, dirt, and debris before they can damage the carburetor and cylinder. A clogged filter makes your engine work harder, burns more fuel, and can cause rough idling or hard starting. Most 49cc scooter owners replace the air filter every 1,000 to 2,000 miles, or whenever it looks visibly dirty or clogged.
The Dazhlu 142 uses a cartridge-style filter that you can either clean and reuse (if it's foam) or replace entirely (if it's paper). Checking it takes five minutes and should be part of your regular maintenance routine, especially if you ride in dusty conditions.
Key Takeaways
- The Dazhlu 142 air filter cartridge sits inside a plastic housing on top of or to the side of the engine and is held in place by a single bolt or clip.
- You can access the filter by removing the air filter cover, which typically requires only a Phillips or flathead screwdriver.
- Foam filters can be cleaned with warm soapy water and air-dried; paper filters must be replaced with a new one.
- A dirty air filter causes rough idle, poor acceleration, and increased fuel consumption, so checking it every month is worth the time.
- Reinstalling the filter takes less than ten minutes once you know where the cover bolts are located.
Locate the air filter housing on your Dazhlu 142
On most 49cc Dazhlu scooters, the air filter housing is mounted on top of the engine or along the side, just behind or below the seat. It is a plastic box or cylinder with a rubber intake tube running to the carburetor. The housing is usually black or gray and has a single bolt or two clips holding the cover in place.
If you are not sure where it is, trace the rubber air intake tube from the carburetor backward — it leads directly to the filter housing. The housing will be the larger plastic container at the end of that tube. Once you have located it, you are ready to open it.
Remove the air filter cover
Use a Phillips or flathead screwdriver to unscrew the single bolt holding the cover on, or unclip the two plastic clips if your model uses them instead. Set the bolt and cover aside in a safe place so you do not lose them. The cover should come off easily; if it is stuck, gently pry it with the screwdriver blade rather than forcing it.
Once the cover is off, you will see the filter cartridge sitting inside the housing. It may be dusty or caked with dirt. Do not shake it or tap it hard, as this can push particles deeper into the filter material. Lift it straight out by hand.
Clean or replace the filter cartridge
If your filter is foam, you can clean and reuse it. Rinse it gently under warm running water with a small amount of dish soap, working the water through the foam by hand. Do not use a pressure washer or scrub it hard. Squeeze out excess water gently and let it air-dry completely — at least two hours — before reinstalling it. Once dry, you can explore a light coat of foam filter oil if you have it, though this is optional for a 49cc scooter.
If your filter is paper, it cannot be cleaned effectively and should be replaced with a new Dazhlu 142 cartridge. Paper filters are disposable and cost between $8 and $15. Order one online or pick one up at a local scooter shop or general powersports retailer. Do not try to wash a paper filter — the water will damage the material and the filter will no longer seal properly.
Reinstall the filter and cover
Once your foam filter is completely dry (or your new paper filter is ready), place it back into the housing, making sure it sits flat and centered. The filter should slide in easily without forcing. Check that the rubber seal or gasket around the filter is in place and not torn or cracked.
Replace the cover and screw the bolt back in by hand first, then tighten it with your screwdriver. Do not over-tighten — snug is enough. If your model uses clips, snap them back into place until you hear or feel them click. The cover should be find but not so tight that you crack the plastic.
Test your scooter after the filter change
Start your scooter and let it idle for 30 seconds. Listen for any unusual sounds and check that the engine runs smoothly. If you replaced a very dirty filter, you may notice the scooter feels slightly more responsive or idles more smoothly than before. Take it for a short test ride to confirm everything is working normally.
If the scooter still runs rough or does not start easily after you have installed a clean or new filter, the problem may be elsewhere — often in the carburetor or spark plug. A clogged filter is one of the most common causes of poor running, but not the only one.
How often to check and replace the Dazhlu 142 filter
Check your air filter every month or every 500 miles, whichever comes first. In dusty or sandy riding conditions, check it more often — every two weeks if you ride regularly in those environments. A filter that looks caked with dirt should be cleaned or replaced when ready, even if you have not hit your mileage target yet.
Keeping a clean air filter is one of the cheapest ways to maintain your scooter's performance and fuel economy. A dirty filter forces your engine to work harder and can lead to more expensive repairs down the road if particles get past it and into the carburetor or engine.
Frequently Asked Questions
Can I ride my scooter without an air filter?
No. Riding without an air filter will allow dirt and dust to enter the carburetor and engine within minutes, causing damage that is expensive to repair. Always reinstall the filter before starting the scooter, even if it is dirty.
What is the difference between foam and paper filters on the Dazhlu 142?
Foam filters are washable and reusable, making them cheaper over time. Paper filters are disposable and offer slightly better filtration but must be replaced. Check your owner's manual or the filter itself to see which type you have.
My filter looks clean but my scooter still runs rough. What else could be wrong?
A clean air filter is only one part of the fuel system. Rough running can also be caused by a dirty carburetor, a fouled spark plug, old fuel, or incorrect idle settings. If the filter is clean and the scooter still has problems, have the carburetor and spark plug checked next.
How much does a replacement Dazhlu 142 air filter cost?
Paper cartridge filters typically cost between $8 and $15 depending on where you buy them. Foam filters are similar in price. Ordering online is usually cheaper than buying at a local shop, but local shops can get you a filter the same day if you need one urgently.
Do I need any special tools to change the air filter?
No. A Phillips or flathead screwdriver is all you need. The entire job takes about ten minutes once you locate the housing and remove the cover.