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Chain kits

Yosoo Health Gear T8F 11T/44T

A T8F chain and sprocket set with an 11-tooth front and 44-tooth rear in steel, supplied as one chain and two sprockets, for modified karts and mini bikes.

Yosoo T8F chain and sprocket set

Yosoo Health Gear T8F 11T/44T

A T8F chain and sprocket set with an 11-tooth front and 44-tooth rear in steel, supplied as one chain and two sprockets, for modified karts and mini bikes.

Chain type
T8F (from the title)
Gearing
11 teeth front, 44 teeth rear (from the title)
Contents
1 chain + 1 T8F 11T front sprocket + 1 rear sprocket (maker’s bullet)
Sprocket material
Steel, stated for maximum power transmission (maker’s bullet)
Stated vehicles
Modified karts, off-road vehicles, mini bikes (maker’s bullet)
Chain length
The maker puts nothing in writing on this.
Amazon reference
B0C5JL6535 (one reference across 4 Amazon marketplaces)
  • Contents itemised piece by piece, so what arrives is known before opening the box
  • Sprocket material named as steel
  • Chain length not published, so the set may need shortening or may not reach

Best for: A T8F-chained mini bike or modified kart needing chain and both sprockets at once.

≈ €18
Check price on Amazon

Specifications

Chain type
T8F (from the title)
Gearing
11 teeth front, 44 teeth rear (from the title)
Contents
1 chain + 1 T8F 11T front sprocket + 1 rear sprocket (maker’s bullet)
Sprocket material
Steel, stated for maximum power transmission (maker’s bullet)
Stated vehicles
Modified karts, off-road vehicles, mini bikes (maker’s bullet)
Chain length
The maker puts nothing in writing on this.
Amazon reference
B0C5JL6535 (one reference across 4 Amazon marketplaces)

What the seller commits to paper

T8F chain with an 11-tooth front and a 44-tooth rear sprocket, in steel. Contents: one chain, one front sprocket, one rear sprocket. For modified karts, off-road vehicles and mini bikes.

The itemised contents are worth having

“Kit” means different things to different sellers, and the difference between a chain with two sprockets and two sprockets alone is the whole purchase. One bullet listing the three pieces removes the ambiguity.

T8F, and why the standard is the first check

There are three small-pitch chain standards in this one family — T8F here, 25H on the kit beside it, 420 on two more. They share no dimension. A sprocket from one will not run a chain from another, and the pitch is what has to match before anything else is considered.

The rows this seller leaves empty

The chain length. Too short and it will not join at the gearing supplied; too long and it needs breaking with a chain tool. Two kits in this family publish a link count.

Availability

Between 18 € and 27 € across the German, French, Italian and Spanish Amazon stores, in the single reading behind this page.

Nothing whatever came back from the British and American Amazon stores, so the buy button there opens a search instead of an empty page.

What Keepa returned in the single reading behind this page. Availability and prices move without notice.

Prices quoted in this text were read on 18 September 2026. The live price is at the top of the page.

More chain kits

  • 2EXTREME chain kit for Derbi and Gilera 50 cc machines

    2EXTREME 4200868

    A chain and sprocket kit for the Derbi Senda, GPR and Gilera SMT 50, at stock gearing of 11 and 53 teeth, with a 140-link 420 chain and a clip joining link.

    Pitch
    420 (maker’s bullet)
    Gearing
    Front sprocket 11 teeth, rear sprocket 53 teeth — stated as the factory ratio (maker’s bullet)
    Chain length
    140 links (maker’s bullet)
    Joining link
    Clip link (maker’s bullet)
    Stated fitment
    Derbi Senda, Derbi GPR, Gilera SMT 50 (from the title)
    Ring type
    Not published — no O-, X- or Z-ring is stated.
    Amazon reference
    B09C8S2C4R (one reference across 2 Amazon marketplaces)
    EAN
    4064553034925
    • The only kit here that publishes pitch, both sprocket counts, chain length AND the joining link type
    • States the gearing is the factory ratio, so the speedometer stays honest
    • A clip link is the weaker of the two joining methods

    Best for: A Derbi Senda, GPR or Gilera SMT 50 going back to standard gearing.

    ≈ €41
    Check price on Amazon
  • Akozon 420 chain and sprocket kit for ATV and quad

    Akozon 420 15T/37T

    A 420-pitch chain and sprocket kit with 15 front and 37 rear teeth in 45 steel and steel alloy, whose own bullet translates the tooth counts as tonnes.

    Pitch
    420 (from the title)
    Gearing
    15 teeth front, 37 teeth rear (from the title). The maker’s own bullet renders these as "a 15-tonne front sprocket" and "a 37-tonne rear sprocket" — a machine translation of 15T and 37T.
    Material
    45 steel and steel alloy, stated for strength, hardness and resistance to splitting (maker’s bullet)
    Contents
    Front sprocket, rear sprocket and 420 chain (maker’s bullet)
    Stated vehicles
    Pit, Pro, Trail, Dirt, Pocket, ATV quads (maker’s bullet)
    Maker’s instruction
    Confirm compatibility with your vehicle before buying, to avoid returns (maker’s bullet)
    Amazon reference
    B0DTJCBQHK (one reference across 5 Amazon marketplaces)
    • Names the steel grade — 45 steel — which no other kit in this family does
    • Contents itemised as three pieces
    • Its own bullets describe the sprockets in tonnes, which is a mistranslation of the tooth counts in its own title

    Best for: An ATV or quad on 420 chain, where the steel grade matters more than the prose.

    ≈ £18
    Check price on Amazon
  • EVGATSAUTO 420 chain and sprocket kit

    EVGATSAUTO 420 chain kit 37/17

    A 420-pitch chain and sprocket kit with 17 front and 37 rear teeth, published for 17 mm countershafts on 50 to 125 cc dirt bikes, mini bikes, ATVs and go-karts.

    Pitch
    420 (from the title)
    Gearing
    17 teeth front, 37 teeth rear (from the title)
    Front sprocket
    0.235 inch thick, 17T; centre mounting holes 1.18 inch apart; compatible with 17 mm engine countershafts (maker’s bullet)
    Treatment
    Sprockets heat-treated, stated to increase strength and wear resistance (maker’s bullet)
    Stated vehicles
    50 cc to 125 cc dirt bikes, mini bikes, ATVs, four-wheel go-karts (maker’s bullet)
    Supplied
    Front sprocket with mounting bolts (maker’s bullet)
    Amazon reference
    B0B2PVTNVP (one reference across 5 Amazon marketplaces)
    • Publishes the countershaft diameter — 17 mm — which is the measurement that decides whether the front sprocket goes on
    • Sprocket thickness and bolt spacing both given
    • Chain length in links is not published, and it is the other half of a chain kit

    Best for: A 50–125 cc machine with a 17 mm countershaft, replacing a worn 420 set.

    ≈ €31
    Check price on Amazon

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