S3 Stars Cylinder Head Insert - Beta Evo (2009 on)
Part Number
S3-ST-42*-*
Change compression of your S3 STARS cylinder head or your original Beta head, available for the Beta Evo 250 and 300cc trials bikes.
The primary use of higher compression heads are when riding at high altitude due to the air being less dense, they can also be used to increase the torque of the engine but be careful as raising the compression to much may lead to pre-ignition (pinking) and detonation which can damage your engine, a higher octane fuel may be required to prevent this from happening.
The Low compression head is great for riders who want a soft power delivery, it makes the bike easier to ride especially in slippy muddy conditions. Great for beginner riders.
The primary use of higher compression heads are when riding at high altitude due to the air being less dense, they can also be used to increase the torque of the engine but be careful as raising the compression to much may lead to pre-ignition (pinking) and detonation which can damage your engine, a higher octane fuel may be required to prevent this from happening.
The Low compression head is great for riders who want a soft power delivery, it makes the bike easier to ride especially in slippy muddy conditions. Great for beginner riders.
| Manufacturer | S3 |
|---|---|
| Beta Part Code | 1218630 000, 1218610 000, 007.11.017.00.00, 007.11.030.00.00, 007110050 000, 007.11.050.00.00, 007.11.216.00.00, 007.11.023.00.00, 007.11.024.00.00 |
| Year | 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021 |
| Model | 250, 300 |
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