BT-3

Beta Trial 2-stroke Spanish Fly Spark Arrestor

Beta

Regular price $85.95

Big news! We have just received USFS approval for our new trials spark arrestor models. These new models maintain the same aluminum body but have a new patent pending pleated screen design to increase open surface area to meet USFS requirements.

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.

USFS approved spark arrestor end cap insert for Beta EVO two stroke models 125-300cc for years 2009-2019. These inserts fit neatly into the stock plastic end cap by replacing an existing rubber grommet (see installation & service instructions page for more info).

Technical Data:
-PATENT PENDING & USFS APPROVED (REF. FILE#0880-01)
-USFS screen type spark arrestor insert
-Body-anodized 6061-T6 aluminum
-Screen-stainless steel
-Sealing- (2X) size 123 viton O ring
-Weight- 49 grams/1.73 oz

Scott pro tip: Use some plumbers tape over the o-rings to ease installation!

Looking for anything at all for your Beta that isn't listed? Please write tom@sierrabmw.com and I'll get it added for you!

Beta Trial 2-stroke Spanish Fly Spark Arrestor
Beta Original Parts by Spanish Fly Racing of USA