These adapters fit neatly into the stock plastic end cap by replacing an existing rubber grommet (see installation instructions for more info). The adapter provides just enough exposed tube length to mount the included TRS-1 spark arrestor external to the plastic end cap, just pick your spark arrestor color (Red, Black, or Blue) at checkout. The inside diameter of the adapter exposed to exhaust flow is equal to or greater than that of the existing tube so no additional flow restriction is created. Use of this adapter allows the spark arrestor to be mounted outside of the end cap for easy removal & cleaning.
Fits Sincro & Sincro Factory two stroke models 125-300cc engine sizes for years 2026-on. Includes required T15 tamper-resistant bit.
Note: Anodized colors will fade due to heat, UV light, & chemical exposure.
BT-5 Technical Data:
PATENT PENDING
Body-anodized 6061-T6 aluminum
Sealing/Fitting- (2X) size 122 Bunna-N O-rings
Weight- 39 grams/1.4 oz
TRS-1 Technical Data:
PATENT PENDING & USFS APPROVED (REF. FILE#0880-03)
USFS screen type spark arrestor
Body-anodized 6061-T6 aluminum
Screen-stainless steel
Sealing-size 125 viton O ring
Set screw- stainless steel 4X0.7mm metric 2mm allen head
Weight- 18grams/0.63oz
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 Sincro 2-stroke Spanish Fly Spark Arrestor Kit
Produced by Spanish Fly Racing of USA
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