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Summary: Compliance above all
In competition Rotax, The technical regulation is extremely strict concerning the diagrams and the height of the exhaust channel. This gauge is not a "forbidden" performance accessory, but a verification tool. It makes it possible to accurately measure the height of the exhaust channel.
Whether you are moving a motor, inspecting a used cylinder or prepare the advanced technical checks, this tool allows you to confirm in a few seconds if your cylinder complies with specifications Rotax for Junior, Max and DD2 categories.
- Why do you have this gauge in your toolbox ?
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Serenity with technical control: Nothing is more frustrating than being disqualified or having to disassemble its emergency engine for minor non-compliance. Check your ratings yourself before going to the track.
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Cylinder inspection: Used during maintenance, it can detect if a cylinder has been "retouched" or has undergone excessive wear over the hours, which could have varied the height of the exhaust.
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Precision Rotax : Made with official ratings, it ensures reliable reading that improvised tools can not guarantee.
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Versatility: Only one tool for the whole range Rotax 125 (Junior, Max, DD2), because they share the same high engine architecture.
💡 Michel's trick
"It's the tool that every race team should have in its drawer. The trick: It is often thought that the exhaust height does not move, but with the temperature mounted and the heating cycles, a cylinder can wear out, or worse, to be improper after a cylinder head or base surfacing. My Pro Council: Use this gauge systematically after each trial or when buying a used cylinder. If the measurement is up to high or low, you will know immediately if you need to adapt your valve setting or carburet to compensate, or if you have to change cylinder to stay competitive. "
- Technical specifications
| Feature | Specification |
| Compatibility | Rotax 125 Junior, Max, DD2 |
| Function | Exhaust height measurement |
| Material | High precision steel (or anodized aluminum according to series) |
| Use | Verification Technical Compliance / Maintenance |
| Reliability | Ratings Rotax GENUINE PARTS |
❓ FAQ SEO (Frequently Asked Questions)
Q: Does this gauge change performance ?
A: No, it's a measuring tool. It does not allow to modify the engine, it only allows you to check whether the actual exhaust channel is the tolerances of the regulation Rotax.
Q: Why is it important for Junior and Max categories ?
A: These categories are called "monotypes" or "controlled". The slightest gap on the exhaust height can cause immediate exclusion. Preventive verification is an obligation for any serious pilot.
✅ Ready for technical control ?
To complete your engine verification equipment, we also have in stock:
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[Kit de joints haut moteur Rotax] (To change after any verification or disassembly).
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[Jauge d'épaisseur de valve d'échappement] (To complete your control of diagrams).
FR421.022
2 Items
Specific References
In competition RotaxThe technical regulation is extremely strict concerning the diagrams and the height of the exhaust channel. This gauge is not a "forbidden" performance accessory, but a verification tool. It makes it possible to accurately measure the height of the exhaust channel.
Whether you are moving a motor, inspecting a used cylinder or prepare the advanced technical checks, this tool allows you to confirm in a few seconds if your cylinder complies with specifications Rotax For Junior, Max and DD2 categories.