BOYESEN Reed Valve for KTM SX 65, HUSQVARNA TC 65 and GAS GAS MC 65 2009-2026

The BOYESEN BOYRAD-40B reed valve block is designed for KTM SX 65, HUSQVARNA TC 65 and GAS GAS MC 65 from 2009 to 2026. On a two-stroke, the reed valve block sits between the carburettor and the engine. Its petals open under suction and close again as soon as the pressure reverses: the engine's pick-up and power depend on how quickly they react and how much air gets through.

Specifications

• Brand: BOYESEN
• Manufacturer part number: BOYRAD-40B
• Weight: 300 g
• Engine: 2-stroke

Who is it for?

• Original cage damaged, or petals wearing out again and again.
• You want more pick-up and response when you open the throttle.

Good to know

Check the petals at every piston change and replace them as soon as a tip is chipped.

Fitting tips

1. Clean the gasket face of the cylinder or crankcase.
2. Fit the reed valve block with a new gasket, petals facing the engine.
3. Tighten the screws in a criss-cross pattern to the recommended torque.
4. Check the carburation and the colour of the spark plug after the first few rides.

Why BOYESEN?

Boyesen is an American brand specialising in the intake and the engine covers of two-stroke engines: reed petals, RAD Valve reed blocks, engine covers and Supercooler water pumps.

Spare parts and items to plan

• Reed block gasket : V FORCE
• Reed petals : TECNIUM · BOYESEN
• Spark plug : NGK LR8B · NGK

Frequently asked questions

Do I need to change the jetting?
Usually not; check the colour of the spark plug after the first few rides and adjust if needed.

Compatibility

Check the exact model and year of your bike in the list below before ordering.

Fits:
GAS GAS MC 65 2026
GAS GAS MC 65 2025
GAS GAS MC 65 2024
GAS GAS MC 65 2023
GAS GAS MC 65 2022
GAS GAS MC 65 2021
HUSQVARNA TC 65 2026
HUSQVARNA TC 65 2025
HUSQVARNA TC 65 2024
HUSQVARNA TC 65 2023
HUSQVARNA TC 65 2022
HUSQVARNA TC 65 2021
HUSQVARNA TC 65 2020
HUSQVARNA TC 65 2019
HUSQVARNA TC 65 2018
HUSQVARNA TC 65 2017
HUSQVARNA TC 65 2016
HUSQVARNA TC 65 2015
HUSQVARNA TC 65 2014
KTM SX 65 2026
KTM SX 65 2025
KTM SX 65 2024
KTM SX 65 2023
KTM SX 65 2022
KTM SX 65 2021
KTM SX 65 2020
KTM SX 65 2019
KTM SX 65 2018
KTM SX 65 2017
KTM SX 65 2016
KTM SX 65 2015
KTM SX 65 2014
KTM SX 65 2013
KTM SX 65 2012
KTM SX 65 2011
KTM SX 65 2010
KTM SX 65 2009