Exhaust Voca Racing BigBore 90cc AM6
incl. tax, plus shipping
Description
VOCA Racing 90 high-end exhaust Minarelli AM6
The VOCA Racing BigBore 90cc is an extremely well-made high-end racing exhaust from VOCA for 80 - 90cc big bore engines. The classic handmade expansion chamber exhaust is sold WITHOUT silencer, allowing you to select a matching silencer from the extensive range of Voca Racing silencers.
Voca Racing 90cc BigBore - high-end performance for racing engines
- Maximum performance: Delivers excellent results in combination with large-volume racing cylinders (80cc / 90cc). The Voca Racing BigBore is one of the most powerful exhausts on the market and is ideal for racing applications and performs best in the high to very high rpm range. We recommend the use of a larger carburetor (at least 28 mm), an internal rotor ignition and a tuning reed valve.
High-quality workmanship: Made from 0.8 mm thick sheet metal, carefully segment-welded by hand.
- Flexible installation: The exhaust is supplied with a 34 mm flange and can be adapted to most big bore cylinders.
Technical specifications Voca Racing big bore 90:
- High-end racing exhaust for 80cc - 90cc setups
- Low-mount exhaust
- Without road approval
- For 50cc motorcycles with AM6 engine such as Beta RR / Aprilia RS / RX / MX, Fantic XM / XE / Caballero, HM CRE Derapage, MBK X-Limit, Malaguti XSM / XTM, Motorhispania Furia, Peugeot XPS, Rieju MRT / SMX / MRX / RS2 / RS3, Sheerco SE-R / SM-R, Yamaha TZR / DTR / DTX
Exhaust scooter, moped, motorcycle
The exhaust has a major influence on the performance of scooters and mopeds. By replacing the original with a tuning exhaust, you can improve the gas flow and increase the engine power.
exhaust parts
- The headpipe or header is the connection between cylinder and exhaust, and an exhaust gasket provides the necessary seal. In street-legal systems, the headpipe is equipped with a legally required restriction. Some people remove this restrictor to increase power.
- The actual exhaust body or expansion chamber is connected to the header pipe. In a classic 2-stroke expansion chamber type exhaust, gas pressure waves are used to improve engine performance.
- At the end there us the silencer or muffler that discharges the exhaust gases and, with the help of damping wool, also reduces the noise generated by the vehicle.
Replacing the exhaust
As a general rule, please check if the exhausts fits BEFORE REMOVING THE RESTRICTOR, otherwise the exhaust cannot be returned.
For 2-stroke engines, various settings and components usually need to be adjusted when the original exhaust is replaced with a tuning version. These changes include:
- Adjusting the carburetor by replacing the main jet.
- Upgrading the clutch or replacing the clutch springs.
- For scooters, it may be necessary to reduce the weight of the variator weights.

Tuning Level: High End racing
We categorize our products into different performance levels Original, Sport, Racing and High End , so that our customers can choose the right parts for their setup. It is really important to combine parts that belong to the same tuning level, this is especially true for cylinders, crankshafts and exhausts.
High End Racing products are exclusively designed for racing and should only be handled by tuning pros with the appropriate technical know-how. High-end racing parts often require modifications or machining of certain elements to accommodate the often larger components (larger crank webs, larger intake, etc.). Whether you stick with 50cc or increase the displacement, high-end racing parts offer much higher performance than the original parts and are the most powerful tuning parts.
Note: To ensure the reliability of the engine, it is important that the parts are compatible and that you do regular maintenance on your two-wheeler.
Exhaust Voca Racing BigBore 90cc AM6 | |
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Article no. | VCR-RD35188 |
Weight | 3,56 kg |
Series | Carbon |
Brand | Voca Racing |
Product type | Exhaust |
Tuning level | High-end |
Homologation | No |
Exhaust restrictor | Welded restrictor |
Exhaust mount | Low |