Boyesen 2 stage power reeds for motorcycles using the Yamaha 125cc engine.

Boyesen reeds feature a 2 stage design, the upper petals work at lower engine speeds and the lower reeds come into play at higher engine speeds.

Airflow is improved and air velocity is improved which results in increased power throughout the rev range.

Fitment:
Derbi GPR 125
Yamaha TZR 125 R / RR
Yamaha DT 125 R/RE/X
Yamaha TDR 125

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