Because even the parts you can't see make a big difference.
 
If you’re riding a Suzuki DR650, there’s a good chance you’ve never checked the secondary air filter—the small foam insert buried inside the plastic cover above your carburetor. But this little piece plays a crucial role in engine performance and longevity. When it gets clogged or deteriorates, your throttle response suffers, and worse, fine dust can get drawn into the vacuum side of the carburetor, risking long-term engine damage.
 
This simple upgrade replaces the stock foam plug (often crumbling or totally missing by now) with a high-quality, oversized breather filter that provides better airflow and protection. The larger surface area means it’s less likely to clog quickly, and it can be easily cleaned and re-oiled alongside your main filter.
 
Installation is a breeze—just slip it into the existing hose, trim the tubing slightly for best fitment, and zip-tie it neatly under the airbox or frame harness. No clamps or fancy fittings needed. Once in place, it helps restore crisp throttle response by allowing the carb diaphragm to move freely, especially noticeable under quick acceleration. It also keeps dust and grime out of the choke circuit, which improves cold-start reliability—something every DR rider can appreciate when out on the trail or in remote backcountry.
 
Riders report smoother response, more predictable fueling, and peace of mind knowing that their bike is better protected in dusty conditions. It’s a small part with a big impact—and one of the easiest ways to improve the performance and longevity of your trusty DR650.
 
Don’t overlook this hidden weak point. Upgrade with the UNI Secondary Air Filter Kit and keep your pig breathing clean.