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Engines and Components› Pistons and Piston Rings

TB Parts

143cc Big Bore Kit

$204.99 $179.00 Save $25.99

SKU: TBW0986

In Stock
In Stock
Ships by Jul 29
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30 Days Return
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Description

The TB Parts 143cc Big Bore Kit is a performance engine upgrade designed for specific mini bikes. This kit increases displacement to 143cc with a 60mm bore, utilizing a high-compression domed piston. It features an all-aluminum, ceramic-coated cylinder for improved efficiency and longevity.

Fitment

Fitment Guaranteed

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on fit.

Log your build in the MOTORMIA app and we’ll guarantee this part fits your exact setup — or your money back, return shipping covered.

Available on iOS & Android

Specifications

BrandTB Parts
Part NumberTBW0986
CategoryEngines and Components

Buy with Confidence

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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