Boyesen Power Reed Dualstage Yamaha Tdr125, Tzr125 91-4 Polisport New Upload · Gas Gas EC300 2019

· Gas Gas EC300 2019

HUSQVARNA Year Pitch REAR SPROCKET CR 125 91-13 520 FXRS 60-50  CR 250 92-94 520 FXRS 60-48  CR 250 95-98 520 FXRS 60-48  CR 250 00-13 520 FXRS 60-48  CR 250 90-91 520 FXRS 60-50  CR 250 99 520 FXRS 60-50  TC 250 02-08 520 FXRS 60-50  TC 250 09-12 520 FXRS 60-50  TC 449 11-13 520 FXRS 60-53  TC 450 02-08 520 FXRS 60-50  TC 510 02-08 520 FXRS 60-47  TC 570 01-03 520 FXRS 60-52  TC 610 91-00 520 FXRS 60-52  TE 250 02-08 520 FXRS 60-50  TE 250 09-12 520 FXRS 60-50  TE 310 09-12 520 FXRS 60-50  TE 400 01-02 520 FXRS 60-50  TE 449 11-13 520 FXRS 60-50  TE 450 08-11 520 FXRS 60-47  TE 450 02-08 520 FXRS 60-50  TE 510 02-08 520 FXRS 60-50  TE 511 11-13 520 FXRS 60-51  TE 570 02-04 520 FXRS 60-48  TE 610 91-07 520 FXRS 60-48  WR 125 98-13 520 FXRS 60-50  WR 125 90-97 520 FXRS 60-52  WR 250 98-12 520 FXRS 60-48  WR 300 09-13 520 FXRS 60-48  GAS GAS Year Pitch Part Number EC 125 97-98 520 FXRS 60-52  EC 125 99-17 520 FXRS 60-51  EC 200 99-17 520 FXRS 60-51  EC 250 97-01 520 FXRS 60-47  EC 250 02-17 520 FXRS 60-48  EC 300 99-02 520 FXRS 60-47  EC 300 03-17 520 FXRS 60-51  Beta Year Pitch Part Number RR 450 4T 07-09 520 FXRS 60-52  RR 450 4T 10-12 520 FXRS 60-52

No further drilling required – perfect fit for your dirt bike

New smaller back for better fit

and the rider's skill level

Boyesen Power Reed Dualstage Yamaha Tdr125, Tzr125 91-4 Polisport New Upload · Gas Gas EC300 2019One reed petal is NOT enough! Boyesen's revolutionary dual stage reed design delivers more usable power than stock. Stock single stage reeds operate most effectively within a relatively narrow RPM range and are limited because of the single stage design. Boyesen's one soft reed on top of one firm flow through reed gives you a wide range of intake control, plus increased intake velocity. Your original reeds can't possibly duplicate that performance.