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Part # BT-4 Technical Data:
USFS "centrifugal" style spark arrestor
1 End Caps are completely flat on the bottom mating surface and are compatible with Gen
Since mid-2025 Beta started using Tamper Resistant T15 screws for the endcap
Adapter- 304L stainless steel
Beta 2020-2026 2-stroke Enduro Bike USFS Approved Spark Arrestor Gen. 2 Color:Red Part # BT-4 Technical Data:Non screen type state of the art USFS approved turbine style spark arrestor specifically designed and tested to flow exactly the same as the stock OEM silencer thus providing zero reduction in performance. This Gen. 2 version gets a 150 gram (5. 3 oz) weight reduction over Gen. 1 via improved machining & manufacturing techniques with no changes to internal flow area dimensions (no changes to flow). Note Gen. 1 & Gen. 2 endcaps are not interchangeable.
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