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This genuine OEM Yamaha air intake expansion chamber (also known as a YEIS Boost Bottle or auxiliary air cleaner box) regulates airflow and intake pressure pulses to optimize low-to-mid range engine torque and throttle response. Constructed from high-density, impact-resistant molded black polypropylene, it features an integrated single-bolt chassis mounting tab and a ribbed hose attachment barb to ensure a secure, airtight seal.Compatible ModelsThis component is compatible with the following liquid-cooled models:Yamaha DT80LC / DT80 LC I (1983–1984)Yamaha DT80LC / DT80 LC II (1985–1997)Yamaha RD80LC / RD80 LC (1982–1986)
Please verify compatibility with your specific motorcycle model before purchasing.
Cleaning Status
partially_cleaned
Cleaning Notes
Used surface cleaner
Worldwide shipping available
Express shipping available at checkout
Estimated delivery: 2-5 business days
All items are carefully packaged for safe transit
Items can be insured — contact us for more information
30-day return policy on most items
Items must be in original condition and packaging
Contact support for return authorization
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Yes, all parts with OEM numbers are genuine manufacturer parts. Check the specifications tab for the OEM number.
We offer a 30-day return policy. Items must be in original condition. See the Shipping tab for complete details.
Yes, we ship to most countries worldwide. Shipping costs and delivery times vary by location.
Parts are sold separately. We recommend professional installation for safety and warranty purposes.
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