DOMA Silencer ref. 200721 for HUSQVARNA TC 125, KTM SX 125 and GAS GAS MC 125 2023-2027

The DOMA 200721 exhaust silencer is designed for KTM SX 125, HUSQVARNA TC 125 and GAS GAS MC 125 from 2023 to 2027. On a two-stroke, the silencer cuts the noise while letting the exhaust gases through. Its rock wool packing compacts and burns away over the hours: the noise goes up and the engine loses efficiency.

Key features

• Steel inner tube and aluminium outer sleeve.
• Fits a Doma or stock expansion chamber.
• Handmade in Calais, France.

Specifications

• Brand: DOMA
• Manufacturer part number: 200721
• Engine: 2-stroke

When to replace it?

• Noise getting louder, metallic sound.
• Packing coming out, or black oil seeping from the end.
• Outer sleeve dented or cracked.

Competition use only, not road-legal. Plan to repack it roughly every 15 to 20 hours.

Fitting tips

1. Fit the silencer to the pipe with a gasket or connector in good condition.
2. Tighten the mounts without putting any strain on the silencer, then check them after the first ride.
3. To repack: drill out the end cap rivets, fill with loose packing and rivet it back on.

Why DOMA?

A French workshop based in Calais since 1992, Doma Racing designs and handbuilds two-stroke expansion chambers and silencers. A 125 world title in 2000 with Grant Langston and original equipment at KTM: a brand run by two-stroke enthusiasts.

Spare parts and items to plan

• Exhaust gasket : ATHENA S410270012020 · ATHENA M753004300094

Frequently asked questions

Will it fit my stock pipe?
Yes: it fits the stock expansion chamber as well as a Doma pipe.

Compatibility

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

Fits:
GAS GAS MC 125 2027
GAS GAS MC 125 2026
GAS GAS MC 125 2025
GAS GAS MC 125 2024
HUSQVARNA TC 125 2027
HUSQVARNA TC 125 2026
HUSQVARNA TC 125 2025
HUSQVARNA TC 125 2024
HUSQVARNA TC 125 2023
KTM SX 125 2027
KTM SX 125 2026
KTM SX 125 2025
KTM SX 125 2024
KTM SX 125 2023