Exterior Components› Body Panels and Components
RK Racing
RK Chain GB420MXZ-90L - Gold
SKU: R05K GB420MXZ-90
Advanced — 4+ hours
Description
This chain is heat-treated using RK's exclusive HIT (Heat Induction Transfer) process. It offers the strongest performance in its class and is ideal for professional-level racing in 50cc to 125cc open classes, with a maximum tensile strength of 5000 foot-pounds and a weight of 1.76 pounds per 100 links.
Fitment
Fitment Guaranteed
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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
| Brand | RK Racing |
| Part Number | R05K GB420MXZ-90 |
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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