Collection: USFS Approved Trials Spark Arrestors & Kits

These are the only USFS approved spark arrestors specifically designed for trials bikes.... so now you have an option to trying to sweet talk your local USFS LEO (law enforcement officer) out of that $700+ spark arrestor ticket.  You can also feel better about protecting the forest to the letter of the law.  Click on the link above if you need a copy of the USFS approval letter.

The new USFS approved spark arrestor screen design incorporates a pleated conical screen shape.  This patent pending shape provides two major benefits:

(1) The pleated shape allows for a significant increase in active open screen surface area, approximately 230% more than our previous screen.  This allows the screen to easily meet USFS open screen area requirements and also reduces clogging by providing more area for exhaust flow.

(2) The conical shape places the majority of the screen surface area parallel to exhaust gas flow rather than perpendicular, this ensures that in stream particulate is not forced into the screen openings but rather across the conical surface where it is collected at the bottom of the screen.  This localization of particulate helps to further reduce clogging & increase time between service/cleaning intervals.