Twin Air Air Filter - 723.29.21
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Product Information
Full details
The Twin Air Air Filter 723.29.21 is designed for off-road enthusiasts and competitive riders who require uncompromising engine protection and optimal airflow. Its signature dual-bonded foam construction excels at capturing dirt and sand while boosting engine power, making it an essential upgrade for those who frequently ride in dusty or sandy conditions. While this filter offers superior filtration, it requires a consistent maintenance routine, including specific cleaning and re-oiling procedures to ensure its performance remains effective over its lifespan.
All features
| Model Part Number | 723.29.21 |
|---|---|
| Brand | Twin Air |
Extended Product Information
FAQs
Can I use engine oil to oil this filter?
No. You should use a dedicated foam air filter oil, which is designed to be sticky and hold fine dust better than standard motor oil.
How often should I clean the Twin Air filter?
Cleaning frequency depends on the conditions. In dusty conditions, check the filter after every ride and clean when the outer layer becomes visibly coated.
Does this filter come pre-oiled?
Unless specified as a pre-oiled variant, these filters usually come dry and must be oiled by the user before the first installation.
Is it safe to use compressed air to clean this filter?
No. Compressed air can tear the foam structure or force dirt deeper into the pores of the filter.
How do I know when the filter is reaching the end of its life?
If the foam begins to lose its elasticity, becomes brittle, or the adhesive seams start to separate after cleaning, the filter should be replaced.
Troubleshooting
Difficulty seating the filter seal
Ensure the airbox cage is clean and that the filter is not being stretched too tightly across the mounting points.
Fine dust appearing on the clean side of the intake
Check that the filter was oiled thoroughly; if the foam is dry, it cannot trap micro-particles. Also, ensure the seal is not pinched.
Pros and Cons
Pros
- Superior multi-stage dust and sand filtration
- Promotes increased engine power via higher airflow
- Durable foam construction survives repeated cleaning
- Precision-engineered seal prevents airbox bypass
Cons
- Requires professional-grade filter oil for proper function
- Not intended for 'dry' use; must be oiled to trap fine particles
- Requires more frequent cleaning in extremely muddy conditions
Setup, Compatibility & Care
To install the Twin Air 723.29.21, ensure the airbox intake track is wiped completely clean of any residual grit. Seat the greaseless foam ring firmly against the airbox flange, ensuring no gaps or folds exist in the foam interface.
For care, it is mandatory to use a high-quality foam filter oil. Submerge the filter in oil, squeeze out the excess (do not wring or twist), and allow it to sit until the oil is evenly distributed. To clean, use a dedicated foam filter cleaner; avoid harsh solvents like gasoline, as these will break down the adhesive and degrade the foam structure over time.