Rotax Technical Documents

Rotax Max Sr. evo 125

30+ Horsepower Designed for ages 15+

Rotax MY20 evo 125

Micro & Mini version designed for long-life & high performance

Rotax Max Jr. evo 125

23+ Horsepower for drivers looking for excitement

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NOTICE: All regulations are downloadable via .pdf file transfer. We recommend following all @racerotax and @j3competition outlets to stay up to date on all the latest Rotax Racing news as well as any technical and sporting updates! × Dismiss alert

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Latest Technical Updates & Notifications

MY20 Overview

Micro & Mini Max MY20 FYI Document

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Did You KNOW

MY20 Mini Fact Sheet

MY20 Mini Full Dyno Overview

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Notification

MY20 Micro Fact Sheet

MY20 Micro Full Dyno Overview

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Notification

Engine Tuning

General Tips on Max Jr. | Sr. | DD2 Engine Settings

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Tuning Tips

Misfire Prevention

Insight on how to prevent any misfires

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Tech tip

Function Switch

Operational Instructions & Longevity

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tech tip

NGK Spark Plug Update

Clarifications & General Updates

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tech tip

Crankshaft Tolerance

Discover the correct tolerance for assembly

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tech tip

News Coming

New Release to be posted

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MY20 Tuning Tips

General Tips for MY20 Micro & MY20 Mini

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Rotax Engine Serial Number / Seal Check

Discover if your engine is eligible for competition.

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